| Entries |
| Document | Title | Date |
|---|
| 20080197022 | GAS SENSOR CONTROL APPARATUS DESIGNED TO ENSURE ACCURACY OF MEASUREMENT IN GAS SENSOR - The gas sensor control apparatus develops a first voltage based on a first reference voltage at a negative terminal of a gas sensor device through a resistor and a second voltage based on a second reference voltage at a positive terminal of the gas sensor device. A controller samples through the resistor a sensor current, as created upon the development of the first and second voltage for measuring the concentration of gas. When the impedance of the gas sensor device is measured, the controller alternates the first voltage across the first reference voltage. The value (i.e., a zero-point) of the voltage applied to the gas sensor device when the sensor current is zero (i.e., 0 mA) depends upon the first and second reference voltages. The zero-point is corrected by regulating the second reference voltage to match an applying voltage characteristic to the gas sensor device correctly. | 08-21-2008 |
| 20080202943 | Particulate Sensor and Method For Operating a Particulate Sensor - A sensor for determining the concentration of particulates in gas mixtures is described, a soot sensor in particular, having a ceramic sensor body surrounded by a metallic housing and having a first and a second measuring electrode. In this instance, the first measuring electrode is connected to the metallic housing of the sensor or the metallic housing of the sensor is designed as the first measuring electrode. By additional electrodes on the ceramic body, the sensor is operable also as a lambda sensor. | 08-28-2008 |
| 20080202944 | Method for Use of an Electrochemical Sensor and Electrodes Forming Said Sensor - A method for in situ self-calibrating of an electrochemical sensor for measuring the concentration of one or more species in an aqueous medium. The method includes: taking a first measurement of the current of a working electrode representative of the concentration of dissolved oxygen in the medium, applying an anode current of predetermined density and duration to a generating electrode to produce a defined increase in the local concentration of the dissolved oxygen, taking a second measurement of the current of the working electrode representative of the concentration of oxygen after applying the anode current to the generating electrode, and computing from the first and second measurements a calibration factor for one or more species that relates the oxygen concentration of the medium to be analyzed and the actually measured current between the working electrode and its counter electrode. | 08-28-2008 |
| 20080223732 | Electrochemical detection method - There is disclosed a method of measuring formation of a barrier to restrict or reduce movement of an electroactive species. The method comprises providing an electrochemical cell having a working electrode and a counter electrode spaced from the working electrode, providing a subject component, a testing component and at least one electroactive species within the cell, the subject and testing components being intended to cause the formation of a barrier to restrict or reduce movement of an electroactive species, applying a potential between the working electrode and the counter electrode sufficient to produce a current proportional to the concentration of the electroactive species being measured, and measuring the current at the working electrode to obtain a measure of the formation of the barrier to restrict or reduce movement of the electroactive species. | 09-18-2008 |
| 20080237061 | Electronic methods for the detection of analytes - The present invention is directed to the detection of target analytes using electronic techniques, particularly AC techniques. | 10-02-2008 |
| 20080264801 | Systems And Methods For Monitoring Plating And Etching Baths - Methods and systems for monitoring electrolyte bath fluids are provided. The electrolyte bath fluids can be electroplating, electroless plating or etching solutions. The monitoring systems employ microfluidic devices, which have built in microfluidic channels and microfabricated thin-film electrodes. The devices are configured with fluid pumps to control the movement and mixing of test fluids through the microfluidic channels. The microfabricated thin-film electrodes are configured so that the plating or etching bath fluid composition can be characterized by electrochemical measurements. The monitoring methods and system provide faster measurement times, generate minimal waste, and occupy dramatically reduced physical space compared to conventional bath-monitor systems. The monitoring systems and method also provide low-cost system and methods for measuring or monitoring electroless plating bath rates. | 10-30-2008 |
| 20080277290 | Gas Sensor - The present invention provides a unique solution to the problems of both steady-state and transient signals produced by a variety of interfering stimuli, including humidity, which relies upon the inclusion in a gas sensing electrode in an electrochemical gas sensor of a catalyst material in addition to a first catalyst material reactive to the target gas, the additional, or second, catalyst material producing a response to an interfering stimulus which is of the opposite polarity to that generated by the first catalyst material. | 11-13-2008 |
| 20080302672 | SYSTEMS AND METHODS FOR SENSING - A sensor system for measuring a plurality of chemical species is disclosed. The sensor system includes a plurality of semiconductor device sensor elements, wherein each sensor element includes at least one wide band gap semiconductor layer and at least one catalytic layer configured to have an electrical property modifiable on exposure to an analyte including one or more chemical species; and an acquisition and analysis system configured to receive sensor signals from the plurality of sensor elements and to use multivariate analysis techniques to analyze the sensor signals to provide multivariate analyte measurement data. | 12-11-2008 |
| 20080302673 | Devices, systems and methods for testing gas sensors and correcting gas sensor output - A method of adjusting the output of an electrochemical sensor including a working electrode and a counter electrode, includes: electronically causing a current flow between the working electrode and the counter electrode via an electrolyte without introducing a test analyte to the electrochemical sensor; measuring a response of the sensor to the current demand resulting from the electronically generated current flow; and using the measured response to adjust the sensor output during sampling of an analyte gas. | 12-11-2008 |
| 20080314765 | Method for detecting defective electrodes in a micro-electrode matrix - Method for detecting defective electrodes in a micro-electrode matrix The method for detecting defective electrodes in an electrode matrix comprises measurement of an electrochemical impedance spectrum for each of the electrodes. Modeling of the spectrum impedance relative to each electrode by means of an implicit non-integral frequency model is performed in the form of a parameter matrix. Principal components analysis of the matrix is performed to transform said parameter matrix into a final matrix containing decorrelated variables representing the parameter matrix in a new space. The distance between each electrode and a reference point is calculated. These calculated distances are compared with a preset threshold distance and the electrodes having a distance greater than the threshold distance are classified as being defective. | 12-25-2008 |
| 20090026090 | METHOD AND APPARATUS FOR MEASURING PROPERTIES OF WEAK ELECTROLYTIC, ORGANIC FLUIDS SUCH AS HYDROCARBON-BASED FLUIDS - A method and system for determining chemical properties of a fluid. The method and system include providing a weak electrolyte fluid, a container for the fluid, a detection method performed by a device having at least two electrodes, a detection and amplification device coupled to the electrodes and a sensed current compared to an uncontaminated, base fluid or compared to data characteristic of fluid contaminated or chemically changed in order to monitor and characterize the fluid. | 01-29-2009 |
| 20090084685 | DESIGN OF AN IC-PROCESSED POLYMER NANO-LIQUID CHROMATOGRAPHY SYSTEM ON-A-CHIP AND METHOD OF MAKING IT - Embodiments in accordance with the present invention relate to packed-column nano-liquid chromatography (nano-LC) systems integrated on-chip, and methods for producing and using same. The microfabricated chip includes a column, frits/filters, an injector, and a detector, fabricated in a process compatible with those conventionally utilized to form integrated circuits. The column can be packed with supports for various different stationary phases to allow performance of different forms of nano-LC, including but not limited to reversed-phase, normal-phase, adsorption, size-exclusion, affinity, and ion chromatography. A cross-channel injector injects a nanolitre/picolitre-volume sample plug at the column inlet. An electrochemical/conductivity sensor integrated at the column outlet measures separation signals. A self-aligned channel-strengthening technique increases pressure rating of the microfluidic system, allowing it to withstand the high pressure normally used in high performance liquid chromatography (HPLC). On-chip sample injection, separation, and detection of mixture of anions in water is successfully demonstrated using ion-exchange nano-LC. | 04-02-2009 |
| 20090095641 | SAMPLE FLUID TESTING DEVICE AND METHOD FOR ANALYZING A SAMPLE FLUID - The invention refers to a sample fluid testing device for analyzing a sample fluid, comprising a test media tape ( | 04-16-2009 |
| 20090120806 | Method for Detecting Sample Supply Condition, and Analyzer - The present invention relates to an analytical tool | 05-14-2009 |
| 20090120807 | Device and Method for Performing Maintenance on an Apparatus in a Flow Duct - The invention relates to a device and a method for performing maintenance on an apparatus. The device has a flow duct with a wall section in which at least one apparatus which projects into the flow duct and which is to be reworked after a certain operating time is arranged. A vessel which is open towards the wall section is arranged to as to be movable relative to the wall section in such a way that in an open position it is arranged at a distance from the apparatus, and in a second position forms, together with the wall section, a sealed volume which is separated from the rest of the flow duct and in which the maintenance of the apparatus is performed. | 05-14-2009 |
| 20090127133 | Apparatus and Method for Measuring Hydrogen Concentration in Molten Metals - The present invention concerns a probe for measuring hydrogen concentration in molten metals comprising a probe body and a hydrogen sensor. The sensor structure is based on a sensor body having a wall within which a sealed cavity is defined. The cavity contains a solid reference material for generating a reference partial pressure of hydrogen within the cavity. At least a portion of the wall of the cavity is formed from a solid electrolyte material carrying a measurement electrode on a surface of the solid electrolyte outside the cavity and a reference electrode on a surface of the solid electrolyte within the cavity, exposed to the reference partial pressure of hydrogen. An electrical conductor extends from the reference electrode through the wall of the cavity to an external surface of the sensor body. The probe body comprises a chamber for receiving the sensor and a reference-signal connection for connecting to the electrical conductor when the sensor is received in the chamber. | 05-21-2009 |
| 20090139876 | Apparatus and Method for Measuring Hydrogen Concentration - The subject invention pertains to an apparatus for measuring hydrogen concentration, wherein the apparatus comprises a sensor comprising a sensor wall enclosing a cavity containing a metal/hydrogen reference. A portion of the wall is formed of a proton-conducting solid electrolyte, connected to a reference electrode on its surface within the cavity and a measurement electrode on its surface outside the cavity. The apparatus comprises a hygroscopic material in the region of the sensor, to enable rehydration of the sensor following hydrogen concentration measurements. | 06-04-2009 |
| 20090166220 | MICROCHIP AND ANALYSIS METHOD USING THE SAME - Provided is a microchip including a substrate, a channel on the substrate, a lid sealing the channel, and an upper lid bonded to the lid. The lid is formed of an elastic material. The lid is detachable from the substrate. The upper lid is formed of a material harder than the elastic material. The area of the upper lid surface that is bonded to the lid is smaller than the area of the upper surface of the lid. | 07-02-2009 |
| 20090183999 | GAS SENSOR ELEMENT AND METHOD - Disclosed herein is a gas sensor cell comprising a solid electrolyte layer comprising a first solid electrolyte layer surface, a sensor electrode disposed on the first solid electrolyte layer surface, a reference electrode disposed on the first solid electrolyte layer surface, and an insulating layer comprising a first insulating layer surface and a second insulating layer surface opposite the first insulating layer surface, wherein the first insulating layer surface is disposed on the first solid electrolyte layer surface, and wherein the sensor electrode is in fluid communication with a gas. Also disclosed is a method of adjusting an impedance of the gas sensor cell, comprising adjusting a structural dimension of a sensing end of the gas sensor cell, wherein the sensing end comprises the sensor electrode and the reference electrode. | 07-23-2009 |
| 20090184000 | Electrochemical Sensor System Using a Substrate With at Least One Aperture and Method of Making the Same - An electrochemical sensor system is adapted to assist in determining an analyte concentration of a fluid. The electrochemical sensor system comprises a substrate, conductive material and a hydrogel or liquid. The substrate having porosity therethrough. The conductive material includes at least one electrode. The at least one electrode is coupled to the substrate. The at least one electrode has a first surface and an opposing second surface. The hydrogel or liquid is adapted to assist in carrying the analyte of the fluid to the first and second surfaces of the at least one electrode. | 07-23-2009 |
| 20090184001 | Sensor Apparatus for an Electrochemical Measuring Device and Method for Carrying Out Electrochemical Measurements - A sensor apparatus for an electrochemical measuring device. The apparatus has at least one electrode, which can be heated using a heating current in the form of an alternating current, and a first and a second connection for the supply line for the heating current. The electrochemical measuring device is connected to the electrode by a third connection. In this case, the apparatus has the third connection connected to the electrode by a bridge circuit, which is also connected to the first and second connections. There also is provided a method for carrying out electrochemical measurements at elevated temperature. The sensor apparatus and the method for carrying out electrochemical measurements enable electrochemical measurements with little interference and directly heated electrodes in conjunction with a simplified design of the electrodes. | 07-23-2009 |
| 20090184002 | BIOSENSOR DEVICE - A biosensor device ( | 07-23-2009 |
| 20090188811 | PREPARATION AND MAINTENANCE OF SENSORS - Apparatus and methods are described for preparing, maintaining, and stabilizing sensors. The apparatus and methods for preparing sensors for use are utilized in advance of the sensor being removed from a sealed, sterilized package. The apparatus include packaging materials having electrical circuits capable of stabilizing a sensor to prepare the sensor for use. The methods for preparing a sensor for use includes methods of providing a solution to a sterilized packaging that contains a sensor connected to a sensor activating circuit, activating the circuit, and allowing the sensor to stabilize. These methods can be performed without compromising the packaging. The apparatus for stabilizing a sensor that is in use include a circuit connectable to the sensor that provides a signal to the sensor that prevents the sensor from becoming destabilized when disconnected from a monitoring device. | 07-30-2009 |
| 20090205976 | BIOSENSOR MEASUREMENT SYSTEM AND METHOD FOR DETECTING ABNORMAL WAVEFORM IN BIOSENSOR - A biosensor measurement system and a method for detecting abnormal measurement in a biosensor, which can significantly enhance the measurement precision without depending on the user's operation manner or the like, can be provided. A voltage application pattern for applying a voltage to a working electrode, a counter electrode, and a detection electrode has a halt period between a first application period and a second application period, and a reduction current measurement value obtained in the first application period is compared with a reduction current measurement value obtained in the second application period, and the measurement values are not outputted when a difference between the measurement values is outside a predetermined range. | 08-20-2009 |
| 20090218235 | Gas sensor - Metal-oxide gas sensor. According to one embodiment, the sensor includes a layer or pellet of tungsten trioxide (WO | 09-03-2009 |
| 20090255829 | APPARATUS AND METHOD FOR DETERMINING THE COMPOSITION OF A MATERIAL BEING EXAMINED - A method includes identifying first data associated with cyclic voltammetry measurements of a material being examined. The cyclic voltammetry measurements include applying a varying first voltage to the material and measuring a first current. The method also includes identifying second data associated with impedance measurements. The impedance measurements include applying a second voltage to the material and measuring a second current. The second data includes a scaling factor. The method further includes adjusting at least part of the first data using the scaling factor and identifying a composition of the material using the adjusted first data. The first data could include a current versus voltage curve that associates values of the first current to values of a sweep voltage. The first data could be adjusted by normalizing the curve using the scaling factor, and the normalized curve could be used to generate a current derivative curve. | 10-15-2009 |
| 20090277805 | ELECTROCHEMICAL SENSORS, SENSOR SYSTEMS AND METHOD OF SENSING ANALYTES - A sensor, includes a working electrode including a first layer formed of a polymeric material. The first layer includes a first surface across which an analyte in a sample can be transported and a second surface generally opposite of the first surface. The first layer satisfies the formula l≦(σD | 11-12-2009 |
| 20090283421 | Invention Concerning Gas Sensors - The invention at hand concerns a novel class of gas sensors, in particular for hydrogen or hydrogen-containing fluids (gases or liquids), such as hydrocarbons, hydrogen sulphides or more complex gas mixtures or gas compositions which contain hydrogen or hydrogen compounds. | 11-19-2009 |
| 20090294301 | Reference Electrodes Having An Extended Lifetime for Use in Long Term Amperometric Sensors - The present application provides Ag/AgCl based reference electrodes having an extended lifetime that are suitable for use in long term amperometric sensors. Electrochemical sensors equipped with reference electrodes described herein demonstrate considerable stability and extended lifetime in a variety of conditions. | 12-03-2009 |
| 20090314660 | Novel Electropolymerisable Monomers, Soluble in an Aqueous Solution and Comprising a Metalloporphyrin - The invention relates to novel electropolymerisable monomers which are to be polymerised in an aqueous solution and comprise: an electropolymerisable pattern selected from acetylene, pyrrols, thiophenes, indols, anilines, azines, p-phenylene vinylenes, p-phenylenes, pyrenes, furanes, selenophenes, pyrridazines, carbazoles, acrylates, methacrylates and the derivatives thereof, and a metalloporphyrine which is substituted by at least two ionised or ionisable entities in an aqueous solution. The invention also relates to a method for the polymerisation of such monomers, to the electroactive probe that can be obtained by the polymerisation of such monomers, and to a method for detecting a target ligand in a biological sample using one such electroactive probe. | 12-24-2009 |
| 20100032316 | Systems and Methods Including Amperometric and Voltammetric Duty Cycles - A sensor system including devices and methods for determining the concentration of an analyte in a sample is described. Input signals including amperometric and voltammetric duty cycles of excitations and relaxations may provide a shorter analysis time and/or improve the accuracy and/or precision of the analysis. The disclosed system may reduce analysis errors, thus improving measurement performance, by adjusting the potential and/or scan rate in response to output currents obtained from voltammetric scans. The disclosed system also may determine the concentration of more than one ionizable species in the sample by adjusting the potential and/or scan rate in response to output currents obtained from voltammetric scans. The multiple, determined concentrations may be used to determine the concentration of multiple analytes or to correct the concentration determined for an analyte, thus improving the measurement performance of the system. | 02-11-2010 |
| 20100038262 | Detection of Analytes Using Reorganization Energy - The invention relates to novel methods and compositions for the detection of analytes using the nuclear reorganization energy, λ, of an electron transfer process. | 02-18-2010 |
| 20100044246 | PARTICULATE MATTER SENSOR WITH A HEATER - An apparatus to detect particulate matter. The apparatus includes a sensor electrode, a shroud, and a heater. The electrode measures a chemical composition within an exhaust stream. The shroud surrounds at least a portion of the sensor electrode, exclusive of a distal end of the sensor electrode exposed to the exhaust stream. The shroud defines an air gap between the sensor electrode and the shroud and an opening toward the distal end of the sensor electrode. The heater is mounted relative to the sensor electrode. The heater burns off particulate matter in the air gap between the sensor electrode and the shroud. | 02-25-2010 |
| 20100051478 | HIGH-THROUGHPUT SCREENING AND DEVICE FOR PHOTOCATALYSTS - The disclosure relates to compositions, devices and methods for screening of photocatalysts for water-splitting. | 03-04-2010 |
| 20100072079 | Electrochemical method for detecting boron in water - The invention relates to a method for detecting the presence of boron in water comprising the production of a conductive buffer solution comprising water and at least one boron complexing agent, the introduction into an electrochemical cell of said solution in the presence of at least one work electrode ( | 03-25-2010 |
| 20100084285 | PROCESS ANALYTIC SENSOR WITH MOISTURE-SCAVENGING ELECTRODE BACKFILL - A process analytic sensor for sensing a characteristic of a process fluid is disclosed. The sensor includes a housing including a sensing portion having an electrical characteristic that varies with a characteristic of the process fluid. An instrument cable has at least one electrical conductor. An electrode connection space is located within the housing and the at least one electrical conductor is electrically coupled to a respective conductor of a sensing element of the sensing portion. A fill material is disposed in the electrode connection space. The fill material cures through exposure to moisture and the fill material is uncured and sealed within the electrode connection space. | 04-08-2010 |
| 20100084286 | MICROFLUIDIC SYSTEMS AND METHODS FOR SCREENING PLATING AND ETCHING BATH COMPOSITIONS - Methods and systems for screening for the effect of bath composition on the performance of electroplating, electroless-plating, electrochemical-etching, electropolishing, and chemical-etching processes are provided. The methods and systems use microfluidic channels that allow for etching or plating studies on an electrode exposed to a multitude of bath compositions at different positions on its surface. After deposition or etching, the electrode surface can be quickly and easily detached from the device for analysis of deposited or etched film properties. | 04-08-2010 |
| 20100089769 | METHOD OF DERIVATISING AN ANALYTE FOR SUBSEQUENT DETECTION THROUGH A NUCLEIC ACID BASED SENSOR - A method of derivatising an analyte for subsequent detection through a nucleic acid based sensor and a sensor based thereon. | 04-15-2010 |
| 20100089770 | Microfluidic device for detection of charged analytes contained in an electrolyte and a method for detecting charged analytes contained in an electrolyte - A device for selective preconcentration/detection of charged analytes contained in an electrolyte having at least two reservoirs separated by at least one rectilinear microchannel with no lengthwise axis X intersection and having at least one controllable voltage source configured to generate a potential difference between the ends of the rectilinear microchannel. The device has means for generating a controllable pressure that is associated with at least one of the reservoirs and is able to generate a pressure gradient between the two ends of the microchannel. The microchannel has, in its median part, means that are configured to generate at least one change in the surface area to volume ratio charge, the device configured to selectively concentrate the charged analytes in the median part of the microchannel upstream and/or downstream of the means configured to generate at least one change in the surface area to volume ration charge. | 04-15-2010 |
| 20100101965 | METHOD FOR DETECTING OR QUANTIFYING TARGET SUBSTANCE USING APPARATUS FOR ELECTROCHEMICAL MEASUREMENTS, APPARATUS FOR ELECTROCHEMICAL MEASUREMENTS, AND ELECTRODE PLATE FOR ELECTROCHEMICAL MEASUREMENTS - To provide an electrode plate for electrochemical measurements that enables detecting and quantifying the concentration of a target substance contained in a sample solution with rapidity and favorable sensitivity using an apparatus for electrochemical measurements is objected to. | 04-29-2010 |
| 20100126880 | DNA COMPLEXING AGENTS - The invention provides a compound of structure (I): wherein X is S, O or NR | 05-27-2010 |
| 20100126881 | Method for Determination of Analyte Concentrations and Related Apparatus - A method is provided for determining analyte concentrations, for example glucose concentrations, that utilizes a dynamic determination of the appropriate time for making a glucose measurement, for example when a current versus time curve substantially conforms to a Cottrell decay, or when the current is established in a plateau region. Dynamic determination of the time to take the measurement allows each strip to operate in the shortest appropriate time frame, thereby avoiding using an average measurement time that may be longer than necessary for some strips and too short for others. | 05-27-2010 |
| 20100133116 | GAS SENSOR CONTROL DEVICE AND GAS SENSOR CONTROL METHOD - A gas sensor control apparatus | 06-03-2010 |
| 20100140108 | ELECTRODE PRECONDITIONING - A method for improving the precision of electrochemical measurements made using an electrochemical cell is provided. The method comprises preconditioning a working electrode of the cell by (i) baking the working electrode; and/or (ii) incubating the working electrode; and/or (iii) applying a preconditioning potential across the cell; and/or (iv) treating the working electrode with a UV laser. | 06-10-2010 |
| 20100140109 | NANOSCALE SPINTRONIC CHEMICAL SENSOR - In general, the present disclosure is directed toward a novel hybrid spintronic device for converting chemical absorption into a change in magnetoresistance. This device uses a novel magnetic material which depends on the attachment of an organic structure to a metallic film for its magnetism. Changes in the chemical environment lead to absorption on the surface of this organometallic bilayer and thus modify its magnetic properties. The change in magnetic properties, in turn, leads to a change in the resistance of a magnetoresistive structure or a spin transistor structure, allowing a standard electrical detection of the chemical change in the sensor surface. | 06-10-2010 |
| 20100140110 | MICROFLUIDIC-BASED LAB-ON-A-TEST CARD FOR A POINT-OF-CARE ANALYZER - A microfluidic-based lab-on-a-test card is described. The test card is used with a point-of-care (POC) analyzer. The test card is designed to receive a sample and then, with the use of the POC analyzer, quantify or count a particular substance in the sample. The test card may be comprised of multiple layers. In one embodiment, the test card includes a primary separation chamber with a filtration surface, a trapping channel, and a particle detector. The test card may also include a nanowire sensor. | 06-10-2010 |
| 20100163429 | GAS SENSING MATERIAL AND GAS SENSOR EMPLOYING THE SAME - Gas sensing material and gas sensor employing the same are provided. The gas sensing material includes an inorganic metal oxide and an organic polymer, wherein the organic polymer includes a repeat unit having the structure of | 07-01-2010 |
| 20100163430 | EROSION AND WEAR RESISTANT SONOELECTROCHEMICAL PROBE - The present invention, in one set of embodiments, provides methods and systems for integrating conducting diamond electrodes into a high power acoustic resonator. More specifically, but not by way of limitation, in certain embodiments of the present invention, diamond electrodes may be integrated into a high power acoustic resonator to provide a robust sensing device that may provide for acoustic cleaning of the electrodes and increasing the rate of mass transport to the diamond electrodes. The diamond electrodes may be used as working, reference or counter electrodes or a combination of two or more of such electrodes. In certain aspects, the high power acoustic resonator may include an acoustic horn for focusing acoustic energy and the diamond electrodes may be coupled with the acoustic horn. | 07-01-2010 |
| 20100181209 | METHOD OF ELECTRICALLY DETECTING BIOMOLECULE - Provided is a method of sensing biomolecules using a bioFET, the method including: forming a layer including Au on a gate of the bioFET; forming a probe immobilized on a substrate separated from the gate by a predetermined distance, and a biomolecule having a thiol group (—SH) which is incompletely bonded to the probe; reacting the probe with a sample including a target molecule; and measuring a current flowing in a channel region between a source and a drain of the bioFET. | 07-22-2010 |
| 20100193375 | SEMICONDUCTOR GAS SENSOR HAVING ADDITIONAL FUNCTIONALITIES OF THE SIGNAL-GENERATING ELECTRODE - In a method for operating a semiconductor gas sensor, the gas sensor including at least one gas-sensitive electrode, the method may provide for impression of a voltage sequence on the gas-sensitive electrode. The operation may take place in a measuring cycle which is subdivided into at least one initialization phase and at least one subsequent measuring phase, a first voltage sequence being impressed on the gas-sensitive electrode during the initialization phase, a second voltage sequence being impressed on the gas-sensitive electrode during the measuring phase, and the first voltage sequence differing from the second voltage sequence. A semiconductor gas sensor may be provided for implementing the method according to the invention, and a method may relate to the use of such a sensor. | 08-05-2010 |
| 20100193376 | ELECTRODES SELECTIVE FOR SOLID-CONTACT IONS BASED ON CARBON NANOTUBES - The invention defines an all-solid-contact ISE which comprises a transducer layer of carbon nanotubes which brings the sensing layer and conducting element into contact. The invention also defines a method for the preparation of said all-solid-contact ISE and the use of the same for the qualitative, quantitative or semi-quantitative analysis of analytes. Said all-solid-contact ISE makes it possible to detect or quantify highly diverse chemical species in a reliable and reproducible manner, with the added advantages derived from its simplicity and low construction cost. | 08-05-2010 |
| 20100200427 | SOLID ELECTROLYTE, METHOD OF PRODUCING THE SOLID ELECTROLYTE, AND GAS SENSOR EQUIPPED WITH GAS SENSOR ELEMENT USING THE SOLID ELECTROLYTE - A solid electrolyte is made of zirconia grains containing yttria and alumina grains dispersed in the zirconia grains. In the solid electrolyte, the yttria content per zirconia content is within a range of 2 to 10 mol. %, the relative density is not less than 93%, and the average particle size Rz of the zirconia grains is not more than 2 μm, an average particle size Ra of the alumina grains is not more than 1 μm. The average particle size Ra of the alumina grains is smaller than the average particle size Rz of the zirconia grains. An average distance value A | 08-12-2010 |
| 20100213079 | MICROSECOND RESPONSE ELECTROCHEMICAL SENSORS AND METHODS THEREOF - A system for the measurement of analyte concentration includes an electrochemical cell having a working electrode coated with a protein layer and a diffusion limiting barrier covering the protein layer, and a counter electrode; a voltage source which provides a voltage between the working electrode and the counter electrode when electrically connected by a conductive medium; and a computing system which measures the dynamic voltage output to the counter electrode within a time period prior to a response from the working electrode and method for use is disclosed. | 08-26-2010 |
| 20100219083 | Method and apparatus for processing electrochemical signals - Systems and methods are provided herein for improving the selectivity and productivity of sensors via digital signal processing techniques. According to one illustrative embodiment, in an electrochemical method for monitoring of a select analyte in a mixed sample with an interfering analyte, an improvement is provided that includes applying a large amplitude potential stimulus waveform to the sample to generate a nonlinear current signal; and resolving a signal contribution from the select analyte in the generated signal by a vector projection method with an analyte vector comprising a plurality of real and imaginary parts of one or more Fourier coefficients at one or more frequencies of a reference current signal for the select analyte. | 09-02-2010 |
| 20100236941 | ELECTRICAL CONNECTION SYSTEM FOR AN ELECTROCHEMICAL ANALYSIS SYSTEM - An electrical connection system for an analysis system and a method for analysis of a liquid sample on an analytical test element using the described analysis system are disclosed. The analysis system provides an evaluation appliance for evaluation of electrical signals, a test element holder for holding and positioning of an analytical test element in a measurement position, and an electrical contact element which makes electrical contact with an electrical contact surface of an analytical test element to produce an electrical connection between the contact surface and the evaluation appliance. The contact element is moved by means such that contact with the electrical contact surface of the test element is made when the test element holder is in the measurement position. | 09-23-2010 |
| 20100252450 | ELECTRODE AND SENSOR HAVING CARBON NANOSTRUCTURES - An active electrode structure is disclosed that includes fullerenes produced by conversion from a carbide. Also disclosed is an electrode that includes a fullerene covalently bonded to a carbide, the fullerene being an aligned or non-aligned array. The fullerene is included in an active electrode structure of the electrode that also includes about 50% or less non-crystalline carbon and about 5% or less of a transition metal that interferes with the ability of the active electrode structure to transfer electrons or detect an analyte. The active electrode substrate or the electrode may be included in a sensor. | 10-07-2010 |
| 20100276302 | CHEMIRESISTOR FOR USE IN CONDUCTING ELECTROLYTE SOLUTION - The present invention provides a chemiresistor-based sensor for measuring the presence or amount of analyte in an electrolyte solution; said chemiresistor comprising (i) a chemiresistor film wherein the impedance of said nanoparticle film changes in the presence of an analyte; and (ii) two electrically conducting electrodes in electrical contact with said nanoparticle film; wherein said electrically conducting electrodes are adapted to be connected to a device for measuring the impedance of said chemiresistor film under a voltage signal and wherein the impedance of the double layer capacitor formed by the two electrically conducting electrodes in the presence of the electrolyte solution, is larger than the impedance of the chemiresistor film either before or after exposure of the chemiresistor film to the analyte. A method of using said chemiresistor-based sensor to measure the presence or amount of analyte is also provided. Further provided is a method of determining the partition coefficient of an analyte using said chemiresistor-based sensor. | 11-04-2010 |
| 20100300895 | APPARATUS AND METHODS FOR PERFORMING ELECTROCHEMICAL REACTIONS - The invention is directed to apparatus and methods for delivering multiple reagents to, and monitoring, a plurality of analytical reactions carried out on a large-scale array of electronic sensors underminimal noise conditions. In one aspect, the invention provides method of improving signal-to-noise ratios of output signals from the electronic sensors sensing analytes or reaction byproducts by subtracting an average of output signals measured from neighboring sensors where analyte or reaction byproducts are absent. In other aspects, the invention provides an array of electronic sensors integrated with a microwell array for confining analytes and/or particles for analytical reactions and a method for identifying microwells containing analytes and/or particles by passing a sensor-active reagent over the array and correlating sensor response times to the presence or absence of analytes or particles. Such detection of analyte- or particle-containing microwells may be used as a step in additional noise reduction methods. | 12-02-2010 |
| 20110000795 | ELECTROCHEMICAL DATA REJECTION METHODOLOGY - A method is provided for determining the concentration of an analyte in a sample which comprises: a) performing an electrochemical test comprising: (i) contacting the sample with an electrochemical cell comprising at least two electrodes; and (ii) obtaining at least one group of three or more measurements of an electrochemical parameter from the cell, wherein each measurement in each at least one group is obtained at a different time; b) deriving from said at least one group of three or more measurements a single value that is indicative of the time-dependent behavior of the measured parameter; c) comparing the single value indicative of the time-dependent behavior of the measured parameter with a pre-determined range of acceptable time-dependent behaviors; d) determining whether the test is acceptable based on the result of said comparison; e) optionally repeating the above-mentioned steps; and 0 determining the concentration of the analyte from the measurements obtained from the acceptable test or acceptable tests. Also provided is a device on which such a method can be performed and a computer program suitable for performing the data rejection methodology comprised in the method. | 01-06-2011 |
| 20110000796 | Ion Selective Electrode Module for Clinical Diagnostics - A method of determining an electrolyte in a sample including adding the sample to an electrolyte module, the electrolyte module including a dilution cup, a flow cell, and a pump, the flow cell having a flow channel with a first end and a second end, the first end fluidically coupled to the dilution cup, and the second end fluidically coupled to the pump; combining the sample with a diluent in the dilution cup to produce a diluted sample; operating the pump to aspirate the diluted sample into the flow cell; measuring the electrolyte in the diluted sample in the flow cell; and reversing the pump to dispense fluid through the second end to displace the diluted sample from the flow cell back into the dilution cup. | 01-06-2011 |
| 20110024305 | Differential Amplifier Sensor Architecture for Increased Sensing Selectivity - A differential amplifier and method of sensing includes a first carbon nanotube field effect transistor (CNTFET) that selectively detects an analyte from an environment comprising analytes and nonspecific interferences, and produces a first signal associated with the detected analyte and any nonspecific interferences; a second CNTFET adjacent to the first CNTFET, wherein the second CNTFET detects the nonspecific interferences of the environment, and produces a second signal associated with the detected nonspecific interferences; and means for generating a differential output signal using the first signal and the second signal as input, wherein the differential output signal is completely devoid of the second signal. | 02-03-2011 |
| 20110042237 | ELECTROCHEMICAL SENSOR DEVICE AND ELECTROCHEMICAL MEASURING METHOD USING THE SAME - Provided is an electrochemical sensor device capable of micromachining a channel while maintaining its measurement sensitivity and of reliably quantitating an analyte in a trace amount of a sample. An electrochemical sensor device includes: a channel portion formed in a substrate; and working electrodes for subjecting an analyte in a solution flowing in the channel portion to electrochemical measurement, the electrochemical sensor device includes a plurality of measuring portions individually provided with the working electrodes, and each of the working electrodes has a plurality of conductive protrusion portions formed to protrude from a bottom surface of each of the measuring portions. | 02-24-2011 |
| 20110048969 | ELECTROCHEMICAL SENSOR - An electrochemical sensor and a method for using an electrochemical sensor are described where the electrochemical sensor comprises a working electrode having thereon one or more redox species that are sensitive to an analyte to be measured and a polymer coating that provides for interaction between the redox species and the analyte. | 03-03-2011 |
| 20110056844 | ELECTROCHEMICAL MOLECULAR RECOGNITION PROBES - Constitute a molecular recognition probe comprising: an electrochemically active group; an activity suppression group that suppresses an electrochemical activity of the electrochemically active group; a receptor area where a molecule of a target substance is specifically recognized; and a molecule area where a steric structure is changed as a result of molecular recognition; wherein the electrochemically active group is suppressed of its activity by the activity suppression group before the molecule is recognized and restores its activity after the molecule is recognized; or constitute a molecular recognition sensor by providing an anchor area on the molecular recognition probe and fixing it on a surface of an electrode. | 03-10-2011 |
| 20110089050 | METHOD AND APPARATUS FOR CHEMICAL ANALYSIS OF FLUIDS - An apparatus and method for electrochemical fluid analysis comprises a chamber ( | 04-21-2011 |
| 20110132773 | APPARATUS AND METHOD FOR DETECTING SUBSTANCES - An apparatus for detecting at least one substance present in a fluid flow includes at least one field effect transistor which acts as a measuring sensor, and at least one field effect transistor which acts as a reference element, the field effect transistors each having at least one source electrode, one drain electrode, and one gate electrode. The gate electrode of the field effect transistor which acts as the measuring sensor is sensitive to the at least one substance to be detected, and the gate electrode of the field effect transistor which acts as the reference element is essentially insensitive to the at least one substance to be detected. The source electrode of one of the field effect transistors and the drain electrode of the other of the field effect transistors are connected to one another and to a signal line. A method for detecting at least one substance present in a fluid flow by using the apparatus is also described, a potential of 0 volt being applied to the signal line and the current flowing on the signal line being measured. | 06-09-2011 |
| 20110139633 | PROCESS FOR VERIFYING AN ELECTROCHEMICAL SUBSTANCE IN A GAS SAMPLE - A process is provided for verifying an electrochemical substance in a gas sample. The process generates in an electrochemical sensor a measured electric value changing over time with a characteristic rising from a reference line to a maximum and again declining to the reference line. The percentage of the electrochemical substance in the gas sample is determined in an analysis circuit by setting a first interval and a second interval in the range of the characteristic after the maximum has been exceeded. The first interval includes the range of the characteristic in the vicinity of the maximum and the second interval includes the range of the maximum in the vicinity of the reference line. The electrochemical substance is determined by determining the ratio of the slopes of the first and second intervals and by comparison with a reference value of the ratio of the slopes of the first and second intervals. | 06-16-2011 |
| 20110162977 | ELECTROCHEMICAL SENSOR UTILISING A DUAL REDOX SYSTEM CONTAINED WITHIN A SINGLE MOLECULE - An electrochemical sensor utilises a chemical compound which is not a macromolecule but rather is a single chemical compound of determinate structure, incorporating two redox systems which differ in their response to a species to be detected. In one form, one redox system displays a voltammetric wave which is pH dependent while another displays a voltammetric wave which is pH independent and acts as an internal reference. The sensor comprises a solid substrate, which may be carbonaceous, on which the compound is immobilized. The sensor may be incorporated into a tool to be suspended in a wellbore. | 07-07-2011 |
| 20110168573 | APPARATUS AND METHOD FOR CONTROLLING A GAS SENSOR - A gas sensor control apparatus including internal resistance detection means for detecting an internal resistance value of one of cells of a gas sensor, concentration detection means for detecting a concentration value of a specific gas component in a gas to be measured and outputting the detected concentration value, heater current supply control means for controlling a current to be supplied to a heater of the gas sensor such that the detected internal resistance value becomes a target value, determination means for determining whether or not the detected internal resistance value is within a permissible range including the target value, nullification information generation means for generating nullification information to nullify the detected concentration value, when it is determined that the target value is out of the permissible range, and nullification information output means for outputting the nullification information to an external device connected to the gas sensor control apparatus. | 07-14-2011 |
| 20110168574 | APPARATUS AND METHOD FOR CONTROLLING A GAS SENSOR - A gas sensor control apparatus including internal resistance detection means for detecting an internal resistance value of one of cells of a gas sensor, concentration detection means for detecting a concentration value of a specific gas component in a gas to be measured and outputting the detected concentration value, heater current supply control means for controlling a current to be supplied to a heater of the gas sensor such that the detected internal resistance value becomes a target value, determination means for determining whether or not the detected internal resistance value is within a permissible range including the target value, and nullification setting means for setting the detected concentration value to a predetermined nullification concentration value to nullify the detected concentration value, when it is determined that the target value is out of the permissible range. | 07-14-2011 |
| 20110203941 | ELECTROCHEMICAL SENSOR AND METHOD FOR MANUFACTURING - A sensor includes a sheath that is elongated along a longitudinal axis; a spacer positioned within the sheath and defining first and second channels having lengths that extend along the longitudinal axis; a first elongated member positioned within the first channel; and a second elongated member positioned within the second channel. The first elongated member includes an active surface forming a working electrode and the second elongated member including an active surface defining a counter electrode. | 08-25-2011 |
| 20110210013 | SELECTIVE GAS SENSOR DEVICE AND ASSOCIATED METHOD - A detection system is presented. The detection system includes a sensing component and a data analyzer. The sensing component includes a first sensor and a second sensor in fluid communication with the first sensor. The first sensor is disposed to allow operation at a predetermined temperature T | 09-01-2011 |
| 20120043225 | Method and Apparatus for Electrocatalytic Amplification on Pre-Oxidized Measuring Electrode - The present invention includes methods and compositions having at least one nanoparticle for analyzing a chemical analyte. The device includes an electrochemical cell connected to a measuring apparatus, wherein the electrochemical cell comprises a container and at least one electrode comprising a surface modification; a solution within the container comprising one or more chemical analytes and one or more metal nanoparticles in the solution, wherein one or more electrocatalytic properties are generated by the one or more metal nanoparticles at the at least one electrode and the contact of individual nanoparticles can be measured. | 02-23-2012 |
| 20120055809 | ASSAY CARTRIDGES AND METHODS OF USING THE SAME - Assay modules, preferably assay cartridges, are described as are reader apparatuses which may be used to control aspects of module operation. The modules preferably comprise a detection chamber with integrated electrodes that may be used for carrying out electrode induced luminescence measurements. Methods are described for immobilizing assay reagents in a controlled fashion on these electrodes and other surfaces. Assay modules and cartridges are also described that have a detection chamber, preferably having integrated electrodes, and other fluidic components which may include sample chambers, waste chambers, conduits, vents, bubble traps, reagent chambers, dry reagent pill zones and the like. In certain preferred embodiments, these modules are adapted to receive and analyze a sample collected on an applicator stick. | 03-08-2012 |
| 20120067741 | APPARATUS AND PROCESS FOR IMPROVED MEASUREMENTS OF A MONITORING DEVICE - Methods and devices for improving measurements of test meter, and in particular for detecting a presence of an electrochemical sensor or strip in the test meter and a start time of an electrochemical reaction, are provided. In one exemplary embodiment of an electrochemical system includes an electrochemical sensor , a test meter, and a circuit. The circuit is configured to form an electrical connection with the electrochemical sensor such that the circuit can detect three distinct voltage ranges. The voltage ranges can be indicative of an absence of the electrochemical sensor, a presence of the sensor that is devoid of a sample, and a presence of the sensor with a sample. Test meters, methods for detecting when a sample starts to fill an electrochemical sensor for establishing when a reaction starts, and circuits for use with electrochemical strips, are also provided. | 03-22-2012 |
| 20120073986 | Electrochemical Test Device - An assay module for an electrochemical test device, said assay module comprising: at least one channel for transporting a liquid to be tested from a deposition zone, where a sample of said liquid to be tested can be deposited, to a testing zone, the testing zone being spaced apart from said deposition zone; and electrodes for measuring an electrical property of liquid in said testing zone, an electrochemical test device comprising such an assay module and a method of testing a liquid sample using such an electrochemical test device. | 03-29-2012 |
| 20120080323 | SYSTEMS AND METHODS OF DISCRIMINATING BETWEEN A CONTROL SAMPLE AND A TEST FLUID USING CAPACITANCE - Methods for distinguishing between an aqueous non-blood sample (e.g., a control solution) and a blood sample are provided herein. In one aspect, the method includes using a test strip in which multiple current transients are measured by a meter electrically connected to an electrochemical test strip. The current transients are used to determine if a sample is a blood sample or an aqueous non-blood sample based on characteristics of the sample (e.g., amount of interferent present, reaction kinetics, and/or capacitance). The method can also include calculating a discrimination criteria based upon these characteristics. Various aspects of a system for distinguishing between a blood sample and an aqueous non-blood sample are also provided herein. | 04-05-2012 |
| 20120080324 | METHOD OF ELECTROCHEMICALLY DETECTING TARGET SUBSTANCE, METHOD OF ELECTROCHEMICALLY DETECTING ANALYTE, TEST CHIP, AND DETECTION SET - The present invention provides a method for electrochemically detecting a target substance and a method for electrochemically detecting an analyte using a probe holding substrate with a probe for trapping a target substance or an analyte held on the substrate body as well as a test chip and a detection set using the above detection methods. | 04-05-2012 |
| 20120091011 | BIOCOMPATIBLE ELECTRODE - A biocompatible electrode formed from an integrated circuit, the electrode comprising: a semiconductor substrate; and an electrode layer at least partially comprising porous valve metal oxide. | 04-19-2012 |
| 20120097552 | REFERENCE ELECTRODE HAVING A FLOWING LIQUID JUNCTION AND FILTER MEMBERS - A flowing junction reference electrode comprising a liquid junction member matched with a filter. The junction member and the filter are situated between a reference electrolyte solution and a sample solution. An array of nanochannels spans the junction member and provides fluid communication between the electrolyte solution and the sample solution. The filter is configured to allow a greater flux of electrolyte than that associated with the junction member. Preferably, the number of pores is greater than the number of nanochannels. The filter is preferably configured to have pores with an inner diameter that is the same or less than the inner diameter of the nanochannels. In some embodiment, the resistance of the filter is made lower relative to the resistance of the junction member by selecting suitable length, number, and inner diameter size for the pores of the filter relative to the nanochannels of the junction member. | 04-26-2012 |
| 20120111738 | GAS SENSOR TESTING DEVICE - Techniques are generally described for a gas sensor testing device. In some examples, the gas sensor testing device comprises a chamber including a wall having an inside surface and an outside surface, the inside surface defining a gas channel, the wall including at least one water molecule. In some examples, the gas sensor testing device includes a first electrode wire coupled to the outside surface of the wall. In some examples, the gas sensor testing device includes a second electrode wire coupled to the inside surface of the wall. In some examples, the wires are operable to generate a current through the wall when a voltage is applied across the wires. In some examples, the current is effective to electrolyze the at least one water molecule to generate a gas. | 05-10-2012 |
| 20120125788 | ELECTROCHEMICAL AFFINITY BIOSENSOR SYSTEM AND METHODS - The present invention provides novel osmium-based electrochemical species for the detection of wide variety of analytes using immunological techniques. The present invention also provides diagnostic kits and test sensors supporting electrode structures that can be used with the osmium-based electrochemical species. The test sensor can be fabricated to support interdigitated arrays of electrodes that have been designed to provide amplification of the electrical signal amplification desired to analyze analytes that may be present at low concentrations. | 05-24-2012 |
| 20120132540 | METHOD FOR AUTOMATICALLY AND RAPIDLY DISTINGUISHING BETWEEN CONTROL AND SAMPLE SOLUTIONS IN A BIOSENSOR STRIP - The present invention is directed to electrochemical sensors and systems and methods for electrochemically sensing a particular constituent within a fluid through the use of a diagnostic test. The methods provide for automatic discrimination of sample from control or standard solutions. A device and system used to determine a constituent level within a fluid that employ such automatic sample discrimination methods or specially formulated solutions is also provided. | 05-31-2012 |
| 20120138483 | METHOD AND SYSTEM FOR ELECTROLYSER SINGLE CELL CURRENT EFFICIENCY - There is described a method for determining single cell current efficiency in an electrolyser, the method comprising: measuring voltage of a plurality of single cells in the electrolyser; measuring electrolyser current feeding the single cells; detecting one of a shutdown period and a start-up period; and for each single cell: determining a time t taken for a voltage level to reach a predetermined occurrence in a voltage curve after a polarization current has been triggered; and calculating cell current efficiency as a function of the time t. | 06-07-2012 |
| 20120160707 | PROCESSES AND SYSTEMS FOR CHARACTERIZING AND BLENDING REFINERY FEEDSTOCKS - A method for characterizing refinery feedstocks according to their corrosivity is provided. The characterization is based on any of: dissociation of acids in the crude, breakup of naphthenic acid molecular associations, and/or dissociation of sulfur compounds in the feedstocks. In one embodiment, the characterization is done via vibrational spectroscopic measurements over a range of temperature, e.g., from ambient to 700° F. The method can be practiced in any of refinery, terminal, and laboratories. It can be used in conjunction with models and hardware to optimize the usage of refinery feedstocks in the blending and valuation of the feedstocks. | 06-28-2012 |
| 20120168321 | ELECTROCHEMICAL HALF CELL, ELECTROCHEMICAL SENSOR AND METHOD FOR MEASURING AT LEAST ONE MEASURED VARIABLE OF A MEASURED MEDIUM WITH AN ELECTROCHEMICAL SENSOR - The invention relates to an electrochemical half cell for application in an electrochemical sensor, wherein a fill electrolyte ( | 07-05-2012 |
| 20120181184 | MICROFLUIDIC, ELECTROCHEMICAL DEVICES - Microfluidic, electrochemical devices are described. The microfluidic, electrochemical device comprises one or more electrode(s) on a substrate and a patterned porous, hydrophilic layer having a fluid-impermeable barrier which substantially permeates the thickness of the porous, hydrophilic layer and defines boundaries of one or more hydrophilic channels within the patterned porous, hydrophilic layer, wherein the hydrophilic channel(s) comprises a hydrophilic region which is in fluidic communication with the electrode(s). In some embodiments, the electrodes comprise a working electrode, a counter electrode, and a reference electrode. In some embodiments, the microfluidic, electrochemical device further comprises a fluid sink. The method of assembling the microfluidic, electrochemical device is described. The method of using the device for electrochemical analysis of one or more analytes is also described. | 07-19-2012 |
| 20120181185 | CONFIGURATION, A SENSING ELEMENT WITH SUCH CONFIGURATION, ELECTROCHEMICAL SENSOR COMPRISING SUCH SENSING ELEMENT AND METHOD FOR ELECTROCHEMICAL SENSING USING SUCH ELECTROCHEMICAL SENSOR - A configuration is disclosed. In one aspect, the configuration includes a substantially planar electrode layer, in a first plane. The configuration further includes a substantially planar two-dimensional electron gas (2DEG) layer electrically connected in series with the electrode layer. The 2DEG layer is provided in a second plane substantially parallel with the first plane and located at a predetermined distance, in a direction orthogonal to the first plane, from the first plane. The 2DEG layer and the electrode layer are patterned such that the electrode layer overlays a part of the 2DEG layer, wherein the predetermined distance between the first plane and the second plane is selected to be sufficiently small for allowing electrostatic interaction between the electrode layer and the 2DEG layer. | 07-19-2012 |
| 20120186994 | FLUID DISTRIBUTION ASSEMBLY FOR TESTING SYSTEMS - Disclosed herein are fluid distribution methods and assemblies for supplying fluid to test assemblies. One embodiment of a fluid distribution assembly comprises at least two input lines each configured to supply a fluid. A source selection component is connected to the input lines and configured to receive the fluid of the input lines and select from the fluids a target fluid. A range selection component is configured to receive the target fluid and to select a flow range of the target fluid, outputting the target fluid to a flow component comprising a first flow adjustment component having a first flow rate resolution and a second flow adjustment component having a second flow rate resolution. The range selection component is configured to selectively output the target fluid to one of the first flow adjustment component and the second flow adjustment component based on the selected flow range. | 07-26-2012 |
| 20120199496 | Analyzing Device, Sensor Testing Device, Testing Method and Computer-Readable Storage Medium - There is provided a sensor testing method including: applying at least one of a first voltage that obtains a response caused by a substance and a second voltage that either obtains no response or substantially no response caused by the substance across a first electrode and a second electrode of a sensor; measuring current flowing between the first electrode and the second electrode; and determining whether or not there is a defect present in the sensor based on a quantity related to an amount of change per specific period of time of a current measured when the first voltage and/or the second voltage have been applied. | 08-09-2012 |
| 20120205258 | DIGITAL POTENTIOSTAT CIRCUIT AND SYSTEM - A small, portable, and inexpensive potentiostat circuit that is suitable for wide-spread electrochemical analysis is disclosed. The potentiostat may be fabricated as a stand-alone electrical component or it may be fabricated in conjunction with a Programmable System-on-Chip (SoC) to facilitate on-the-fly calibration and configuration. | 08-16-2012 |
| 20120211371 | PARTICULATE MATTER AMOUNT DETECTION SYSTEM - A porous structure including a pair of electrodes disposed in a flow direction of exhaust gas and a solid electrolyte interposed between the electrodes is arranged in an exhaust passage of an internal combustion engine, and the amount of a particulate matter in exhaust gas is specified based on a potential difference generated between the electrodes. | 08-23-2012 |
| 20120217171 | Sensor with Movable Part and Biasing - Methods and apparatuses are provided wherein a sensor which comprises at least two electrodes and a movable part is alternately biased with at least two different voltages. | 08-30-2012 |
| 20120228154 | GAS SENSOR ELEMENT AND METHOD OF DETECTING CONCENTRATION OF TARGET DETECTION GAS - A gas sensor element has a first cell, a second cell, and a solid electrolyte layer having proton conductivity commonly used by the first cell and the second cell. The first cell has a first cathode and a first anode exposed to the target detection gas containing hydrogen atoms. The second cell has a second anode, a second cathode, and a shield layer with which the second anode is covered. A voltage is supplied to the first and second cells. A gas concentration of the target detection gas is calculated on the basis of a difference between a current of the first cell and a current of the second cell because the current in the first cell is a sum of proton conductivity current and an electron conductivity current. The current in the second cell is an electron conductive current only. | 09-13-2012 |
| 20120234696 | ELECTRODES, SENSORS AND METHODS FOR MEASURING COMPONENTS IN WATER - Improvements in references electrodes, halogen sensors, pH sensors, TDS sensors, combinations thereof, and related methods. | 09-20-2012 |
| 20120234697 | SENSOR CONTROL APPARATUS, SENSOR CONTROL SYSTEM, AND SENSOR CONTROL METHOD - A sensor control apparatus is disclosed, including a preliminary control for supplying a constant current to a second oxygen pump cell of a gas sensor for a constant period of time so as to control to a constant level the amount of oxygen pumped out from a second measurement chamber (S | 09-20-2012 |
| 20120234698 | METHODS FOR TESTING IMPURITY CONTENT IN A PRECIOUS METAL - A precious metal testing apparatus and methods adapted to analyze impurities in a precious metal test sample is described. The testing apparatus contains a test probe that has a replaceable portion and that is connected to a meter to measure resistance. The replaceable portion contains or forms a reservoir that includes at least one electrolyte component, a conductive member, and a fibrous tip. The electrolyte component is fluidly associated with a fiber tip and the conductive member contacts an electrical contact located outside the reservoir. Methods of testing and instructions regarding such methods are also included. | 09-20-2012 |
| 20120273368 | Analysis Device - An analysis device is disclosed which includes an electron detection medium to obtain information needed for analyzing an analyte in correlation with an electron transfer level, and a reagent part which is disposed on the electron detection medium and includes an electron transporting substance to transport electrons between the analyte and the electron detection medium, the electron transporting substance including a water-soluble aromatic heterocycle compound, and being free of a metal complex. An analysis method using the analysis device is also disclosed. | 11-01-2012 |
| 20120273369 | GAS SENSOR APPARATUS AND METHOD FOR CONTROLLING THE SAME - When a detection signal obtained from the cell of a gas sensor (S | 11-01-2012 |
| 20120298528 | BIOSENSOR AND ANALYSIS METHOD USING SAME - The present invention provides a biosensor including a working electrode or working electrodes on which a reaction material or a bonding material is immobilized, where the reaction material is reactive with a target material so as to produce a product, and the bonding material is bondable with a target material; a counter electrode; and a reaction section for holding a sample liquid containing the target material, the working electrode and the counter electrode being provided on a bottom surface of the reaction section, and the working electrode occupying the bottom surface of the reaction section by a ratio of 0.7 or greater. | 11-29-2012 |
| 20130075275 | METHOD AND APPARATUS FOR SIMULTANEOUS SPECTROELECTROCHEMICAL ANALYSIS - An apparatus and method of simultaneous spectroelectrochemical analysis is disclosed. A transparent surface is provided. An analyte solution on the transparent surface is contacted with a working electrode and at least one other electrode. Light from a light source is focused on either a surface of the working electrode or the analyte solution. The light reflected from either the surface of the working electrode or the analyte solution is detected. The potential of the working electrode is adjusted, and spectroscopic changes of the analyte solution that occur with changes in thermodynamic potentials are monitored. | 03-28-2013 |
| 20130146478 | Analyte Test Strip and Analyte Meter Device - A test strip with an incorporated optical waveguide and deflectors punched through the optical waveguide allows light to exit through a layer of the test strip and be detected by a photo detector. Using light and a photodetector, these uniquely coded strips are identified. The waveguide can be constructed by sandwiching two layers of the test strip around a light transmissible layer. This configuration allows light to be transmitted through the test strip and out the other end, as well as allowing some light to escape the deflector. This light is detected by a photodetector mounted in the analyte test meter. The deflectors may be placed in patterns such that detection of this light indicates certain characteristics of the strip, such as non-counterfeit, regional identification, type of analyte tested, and coding information. | 06-13-2013 |
| 20130161203 | MONITORING LEVELER CONCENTRATIONS IN ELECTROPLATING SOLUTIONS - Provided herein are methods and apparatus for determining leveler concentration in an electroplating solution. The approach allows the concentration of leveler to be detected and measured, even at very low leveler concentrations. According to the various embodiments, the methods involve providing an electrode with a metal surface, exposing the electrode to a pre-acceleration solution with at least one accelerator, allowing the surface of the electrode to become saturated with accelerator, measuring an electrochemical response while plating the electrode in a solution, and determining the concentration of leveler in the solution by comparing the measured electrochemical response to a model relating leveler concentration to known electrochemical responses. According to other embodiments, the apparatus includes an electrode, a measuring apparatus or an electrochemical cell configured to measure an electrochemical response, and a controller designed to carry out the method outlined above. | 06-27-2013 |
| 20130193003 | METHOD AND APPARATUS FOR SENSING A PROPERTY OF A FLUID - A device for sensing a property of a fluid comprising a first substrate having formed thereon a sensor configured in use to come into contact with a fluid in order to sense a property of the fluid, and a wireless transmitter for transmitting data over a wireless data link and a second substrate having formed thereon a wireless receiver for receiving data transmitted over said wireless link by said wireless transmitter. The first substrate is fixed to or within said second substrate. Additionally or alternatively, the device comprises a first substrate defining one or more microfluidic structures for receiving a fluid to be sensed and a second substrate comprising or having attached thereto a multiplicity of fluid sensors, the number of sensors being greater than the number of microfluidic structures. The second substrate is in contact with the first substrate such that at least one of the sensors is aligned with the or each microfluidic structure so as to provide an active sensor for the or each structure, and such that one or more of the sensors is or are not aligned with any microfluidic structure and is or are thereby redundant. | 08-01-2013 |
| 20130199941 | CONDITIONING APPARATUS AND METHOD FOR ION-SELECTIVE ELECTRODE - Ion-selective electrodes (ISE's) optimised for analyte determinations and provides methods and apparatus for conditioning ion selective electrodes. The conditioning methods and apparatus are particularly useful for ISE's selective for, difficult to condition, less stable and temperature sensitive products, an are based on a concentration gradient and/or a short exposure to an increased temperature. | 08-08-2013 |
| 20130248379 | Systems and Methods for Integrated Electrochemical and Electrical Detection - An integrated sensing device is capable of detecting analytes using electrochemical (EC) and electrical (E) signals. The device introduces synergetic new capabilities and enhances the sensitivity and selectivity for real-time detection of an analyte in complex matrices, including the presence of high concentration of interferences in liquids and in gas phases. | 09-26-2013 |
| 20130277232 | MULTIPLE LAYER GEL - A multiple layer gel and method for forming a multiple layer gel are provided. The multiple layer gel includes an isolation layer and an electrolyte layer. The isolation layer provides a molecular weight screen, to prevent proteins or other molecules from contacting a reference cell covered by the isolation layer. The electrolyte layer covers the isolation layer, and provides a source of ions that place the reference cell in ionic and/or electrical contact with a fluid sample. The multiple layer gel can be used to maintain a reliable reference voltage from an associated reference cell while an electrical potential or other electrical characteristic of a sample fluid is being determined. | 10-24-2013 |
| 20130292264 | TEST STRIP AND METHOD FOR HUMIDITY DETECTION - The present invention related to a test strip and a method for humidity detection. The test strip comprises two humidity detecting materials for detecting humidity change and one of the humidity detecting materials is exposed to outer environment. Detect the two humidity changes to obtain a ratio that is used for comparing with a value and then it can prevent from exceeding a predetermined humidity value, and whereby the test strip and the method could achieve the goal of simple humidity detection. | 11-07-2013 |
| 20130334061 | SENSOR FOR SENSING THE PRESENCE OF AT LEAST ONE FLUIDUM - A Sensor for sensing the presence of at least one fluidum in a space adjoining the sensor is disclosed. In one aspect, the sensor has a two-dimensional electron gas (2DEG) layer stack, a gate electrode overlaying at least part of the 2DEG layer stack for electrostatically controlling electron density of a 2DEG in the 2DEG layer stack and a source and a drain electrode contacting the 2DEG layer stack for electrically contacting the 2DEG, wherein a detection opening is provided in between the gate electrode and the 2DEG layer stack and wherein the detection opening communicates with the space through a detection opening inlet such that molecules of the fluidum can move from the adjoining space through the detection opening inlet into the detection opening where they can measurably alter a electric characteristic of the 2DEG. | 12-19-2013 |
| 20140014531 | SAMPLE DEPENDENT SELECTION OF PARAMETERS FOR USE IN ELECTROKINETIC TREATMENT OF THE SAMPLE - Performing an electrokinetic treatment on different samples includes identifying an electrical signal that is appropriate for use in the treatment of each sample. The identification of the electrical signals results in different electrical signals being identified for different samples. The electrokinetic treatment of a sample results in that sample being exposed to the electrical signal identified for that sample. Accordingly, different samples are exposed to different electrical signals. An electrokinetic treatment employs one or more electrokinetic phenomena to cause movement of one or more agents within the sample relative to the sample. In some instances, the method also includes using each of the electrokinetically treated samples to generate an electrochemical sample and then performing an electrochemical analysis on each of the electrochemical samples. | 01-16-2014 |
| 20140014532 | ADJUSTABLE, RETRACTABLE PROBE INSERTION ASSEMBLY - An adjustable insertion assembly for an electrochemical sensor includes an electrode holder to receive the sensor, having a distal aperture to permit process fluid to contact the sensor. A receptacle slidably receives the holder, for a sliding range of motion extending from fully inserted to fully retracted positions. An open distal end portion of the receptacle extends through a wall of a process fluid vessel, so that the aperture is open to the process fluid when fully inserted, and closed when fully retracted. A leverage member is releasably movable relative to the receptacle, and moves with a captured extension. An abutment of the receptacle engages the extension so that movement of the leverage member in opposite directions alternately clamps and releases the electrode holder relative to the receptacle to substantially prevent and permit movement at substantially any point within the range of movement. | 01-16-2014 |
| 20140021064 | SYSTEMS AND METHODS OF FAST POWER UP FOR ELECTROCHEMICAL SENSORS - Systems and methods of fast power up for electrochemical sensors are provided. A system can include an electrochemical sensor, and a potentiostat circuit, wherein, upon startup, the potentiostat circuit drives the electrochemical sensor to the electrochemical sensor's normal operating condition at a rate that is not limited by voltage and/or current supply. A method can include a potentiostat circuit driving an electrochemical sensor to the electrochemical sensor's normal operating condition at a rate that is not limited by voltage and/or current supply. | 01-23-2014 |
| 20140042036 | SENSING METHOD OF ELECTROCHEMICAL SENSOR - A sensing method of an electrochemical sensor including the following steps is provided. First, a fluorescent material is immobilized on a surface of an electrode so as to form a sensing electrode. The sensing electrode is then used to execute an electrochemical test of a target in a light-shielding environment. | 02-13-2014 |
| 20140042037 | METHOD AND APPARATUS FOR NANOPARTICLE ELECTROGENERATED CHEMILUMINESCENCE AMPLIFICATION - Methods and devices for analyzing a chemical analyte using an electrochemical cell connected to a measuring apparatus are provided. The electrochemical cell contains a solution having one or more conductive or redox active NPs, one or more chemical analytes, and an indicator. In addition, the electrochemical cell contains one or more electrodes in communication with the solution. One or more catalytic ECL properties are generated by the interaction of the one or more conductive or redox active NPs and the liquid sample and measured at the one or more electrodes or with an optical detection system. | 02-13-2014 |
| 20140102914 | ANALYTE SENSOR WITH SPENT GAS FLUSHED ENDCAPS - A sensor for detecting a target analyte in a gaseous sample at ultra-low concentrations wherein access opening(s) provided through the sensor housing are plugged with endcap(s) and spent gas (i.e., gaseous sample post detection) is channeled along the interface between the sensor housing and the endcap(s) prior to venting of the spent gas, for flushing any environmentally introduced target analyte from this interface. | 04-17-2014 |
| 20140138259 | NANOPARTICLE-BASED GAS SENSORS AND METHODS OF USING THE SAME - Gas sensors are provided. The gas sensors include a gas sensing element having metal oxide nanoparticles and a thin-film heating element. Systems that include the gas sensors, as well as methods of using the gas sensors, are also provided. Embodiments of the present disclosure find use in a variety of different applications, including detecting whether an analyte is present in a gaseous sample. | 05-22-2014 |
| 20140138260 | CARTRIDGE FOR DIAGNOSTIC TESTING - The present invention relates to a cartridge for conducting diagnostic assays. The cartridge consists of an assembly of components that are easily assembled. The cartridge provides means for receiving a patient sample, precisely controlling fluid introduction, onboard storage of assay fluid and conducting different assay protocols and detection of a plurality of analytes. Methods of use for the cartridge are described. The disclosed invention is suitable for point of care environments or any place where rapid, ultrasensitive testing is required. | 05-22-2014 |
| 20140151242 | LEAK DETECTION FORMULA, ANALYZER AND METHODS OF USE - Detecting a leak from a site in a sealed system with a source of pressurized gas which is capable of passing through the site, a composition of matter which adheres to the surfaces of the system and which is capable of showing the presence of the gas escaping from the site. The method includes: injecting gas into the system to a pressure in excess of the surrounding pressure, and covering the external surface with the composition to identify the location of the site by the interaction of the escaping gas with the composition. The composition is foam that includes a surfactant which forms a least one bubble in the presence of escaping gas and an indicator which changes color in the presence of the escaping gas. The leak is an opening down to at least the size of a hole 0.001″ in diameter. A gas detector may also be used. | 06-05-2014 |
| 20140183059 | MICROFLUIDIC DEVICES FOR MULTIPLEXED ELECTROCHEMICAL DETECTION - The multiplexed electrochemical microfluidic paper-based analytical device comprises multiple detection zones for the detection of multiple biochemical analytes from one single sample. Cavity valves integrated on the device will deliver the sample to different detection zones. These analytes include, but are not limited to, urea, creatinine, creatine, glucose, lactate, ethanol, uric acid, cholesterol, pyruvate, creatinine, β-hydroxybutyrate, alanine aminotrasferase, aspartate aminotransferase, alkaline phosphatase, and acetylcholinesterase (or its inhibitors). This system will provide a simple and low-cost POC approach to obtain quantitative and multiple biological information from one sample (e.g. one drop of blood). | 07-03-2014 |
| 20140190839 | CONTACT LENSES HAVING TWO-ELECTRODE ELECTROCHEMICAL SENSORS - Apparatus, systems and methods employing contact lenses with two-electrode electrochemical sensors are provided. In some aspects, the contact lens includes: a substrate that forms at least part of a body of the contact lens; and a circuit, disposed on or within the substrate, and including a two-electrode electrochemical sensor. The two-electrode electrochemical sensor can include: a working electrode; and a combination reference-counter electrode. The electrochemical sensor can be an amperometric sensor that senses a biological feature of a wearer of the contact lens. The working electrode can generate a signal indicative of the sensed analyte, and the combination reference-counter electrode can pass the signal generated from the working electrode. The signal can be employed to determine the analyte concentration of a solution in contact with the contact lens. | 07-10-2014 |
| 20140216947 | ELECTRODE ARRANGEMENT AND METHOD FOR OPERATING THE ELECTRODE ARRANGEMENT - An electrode array for the cyclic reduction and oxidation of a redox species in an electrolyte, wherein both electrodes are disposed on an insulating substrate and connected to a counter electrode for the application of a voltage, comprising: 1) a control electrode for reacting the redox species for cyclic electron transport between the electrodes: and b) a collector electrode disposed opposite the control electrode, wherein a layer structure composed of a second insulator and a charge transfer mediator disposed thereon is additionally disposed on the side of the collector electrode located opposite the insulating substrate for reacting the redox species Two methods for operating the electrode array are disclosed. | 08-07-2014 |
| 20140246334 | SYSTEMS, DEVICES AND METHODS FOR MULTIPLEXED DIAGNOSTICS - Exemplary embodiments provide diagnostic devices, systems and methods for determining the presence or absence of one or more markers or characteristics in one or more samples. An exemplary diagnostic device may display a first two-dimensional machine-readable output to indicate the presence or absence of a first characteristic in a sample. Similarly, the exemplary diagnostic device may display a second two-dimensional machine-readable output to indicate the presence or absence of a second characteristic in a sample. An image capture device may be used to automatically detect the two-dimensional machine-readable output appearing in the diagnostic device. A computational device may be used to automatically determine whether the presence or absence of the first characteristic and/or the second characteristic based on the two-dimensional machine-readable output displayed in the diagnostic device. | 09-04-2014 |
| 20140251825 | CHARACTERISATION OF PARTICLES - A method of determining the charge of at least one test particle, comprising: applying one of an electric current or a voltage across an aperture connecting two chambers, whereby the chambers are at least partially filled with electrolyte and whereby the at least one test particle is suspended in the electrolyte of at least one of the chambers; measuring the other of the electric current or voltage across the aperture; varying a pressure differential between the two chambers; and determining the charge based on the measurements of the electric current or voltage. | 09-11-2014 |
| 20140262827 | Microelectrochemical Sensor and Method for Operating a Microelectrochemical Sensor - A microelectrochemical sensor includes an energy supply unit and a sensor unit. The energy supply unit is configured to generate electrical energy using a reference fluid. The sensor unit is configured to determine a concentration difference of a chemical species between a measuring fluid and the reference fluid. The measuring fluid has an unknown concentration of the species, and the reference fluid has a known concentration of the species. The sensor unit is electrically connected to the energy supply unit and is designed to determine the concentration difference using the electrical energy from the energy supply unit. | 09-18-2014 |
| 20140291166 | METHOD AND KIT FOR ELECTROCHEMICALLY DETECTING ANALYTE - A method for electrochemically detecting an analyte contained in a sample using a working electrode and a counter electrode, comprising: allowing an electrolyte solution which contains a solution prepared by dissolving an imidazolium iodide compound in a protic solvent to be into contact with the working electrode and the counter electrode; and electrochemically detecting the analyte contained in the sample in the presence of the electrolyte solution is disclosed. A kit to be used for the method for electrochemically detecting an analyte is also disclosed. | 10-02-2014 |
| 20140326613 | Techniques for Fabricating Janus Sensors - Electromechanical sensors that employ Janus micro/nano-components and techniques for the fabrication thereof are provided. In one aspect, a method of fabricating an electromechanical sensor includes the following steps. A back gate is formed on a substrate. A gate dielectric is deposited over the back gate. An intermediate layer is formed on the back gate having a micro-fluidic channel formed therein. Top electrodes are formed above the micro-fluidic channel. One or more Janus components are placed in the micro-fluidic channel, wherein each of the Janus components has a first portion having an electrically conductive material and a second portion having an electrically insulating material. The micro-fluidic channel is filled with a fluid. The electrically insulating material has a negative surface charge at a pH of the fluid and an isoelectric point at a pH less than the pH of the fluid. | 11-06-2014 |
| 20140326614 | ANALYTICAL TEST METER - A portable analytical test meter is designed for use with an associated analytical test strip. A test-strip-receiving module receives the analytical test strip and is electrically connected to a dummy load calibration circuit block. That block is configured to provide a dummy magnitude correction and a dummy phase correction; and a memory block is configured to store the dummy magnitude correction and the dummy phase correction. A method for calibrating a portable analytical test meter for use with an analytical test strip includes determining a dummy magnitude correction and a dummy phase correction of the portable analytical test meter using a dummy load calibration circuit block of the portable analytical test meter. The dummy magnitude correction and the dummy phase correction are stored in a memory block of the portable analytical test meter. Using the stored dummy magnitude correction and stored dummy phase correction, an analyte is determined. | 11-06-2014 |
| 20140326615 | HYDROGEN SENSOR - A capacitor for a hydrogen sensor includes a dielectric substrate, a first electrode on the dielectric substrate, a second electrode on the dielectric substrate, and palladium islands on the dielectric substrate and between the first and second electrodes. The palladium islands are electrically isolated from the first and second electrodes and from each other. | 11-06-2014 |
| 20140326616 | Analyte Determination Method and Analyte Meter - The presence of oxygen or red blood cells in a sample applied to an electrochemical test strip that makes use of a reduced mediator is corrected for by an additive correction factor that is determined as a function of the temperature of the sample and a measurement that reflects the oxygen carrying capacity of the sample. The measured oxygen carrying capacity can also be used to determine hematocrit and to distinguish between blood samples and control solutions applied to a test strip. | 11-06-2014 |
| 20140360890 | ASYMMETRIC SENSORS - Cantilever Sensors made of piezoelectric material may be structured with various configurations of asymmetric anchors as well as asymmetric electrodes. Such asymmetry enables measurement of resonant properties of the cantilever that are otherwise unmeasurable electrically, resulting in significant advantages for ease of measurement. In addition the asymmetry enables expression of torsional and/or lateral modes that are otherwise absent, and these modes also exhibit excellent mass-change sensitivity. The asymmetries may enable resonant mode impedance-coupling. | 12-11-2014 |
| 20150021202 | Device and Method for Electrochemical Gas Sensing - The disclosure relates to a device for electrochemical gas sensing, comprising a plurality of different electrodes and a freestanding electrolyte film covering said electrodes, wherein at least two of those electrodes present a different distance from its top surface to the electrolyte film surface. The disclosure also relates to an electronic system and a method for electrochemical gas sensing. | 01-22-2015 |
| 20150041334 | GAS SENSOR CONTROL APPARATUS AND GAS SENSOR CONTROL METHOD - A catalytic conversion characteristic of a catalyst, which indicates a relationship between an air-to-fuel ratio and a catalytic conversion efficiency of the catalyst, includes a second air-to-fuel ratio point, which is a point of starting an outflow of NOx from the catalyst and is located on a rich side of a first air-to-fuel ratio point that forms an equilibrium point for a rich component and oxygen. A constant current circuit, which induces a flow of an electric current from an exhaust side electrode to an atmosphere side electrode through a solid electrolyte layer in a sensor element, is connected to the sensor element. A microcomputer controls a current value of the electric current, which is induced by the constant current circuit, based on a difference between the first air-to-fuel ratio point and the second air-to-fuel ratio point at the catalyst. | 02-12-2015 |
| 20150068920 | FILL SUFFICIENCY METHOD AND SYSTEM - Described and illustrated herein are one exemplary method and a measurement system having a meter and a test strip. The test strip has a first working electrode, reference electrode and second working electrode. In this method, acceptable fill data from known first current and known second current are used to predict an estimated second current at proximate the second time period (for a given batch of test strips) during the test sequence. The estimated second current at proximate the second time interval is then compared with a measured actual second current at proximate the second time interval during an actual test to determine if the measured actual second current is substantially equal to or within an acceptable percent deviation from the estimated second current so as to determine sufficient volume of a physiological fluid sample in the test strip. | 03-12-2015 |
| 20150083609 | ANALYTICAL TEST STRIP WITH INTEGRATED BATTERY - A test strip for use with an analyte meter comprises an integrated power source, such as a battery wherein the test strip is configured upon insertion into the meter to provide sufficient power for completing a sample assay without requiring a separate power source in the meter. | 03-26-2015 |
| 20150083610 | Method and Apparatus for Assay of Electrochemical Properties - The presence of a select analyte in the sample is evaluated in an an electrochemical system using a conduction cell-type apparatus. A potential or current is generated between the two electrodes of the cell sufficient to bring about oxidation or reduction of the analyte or of a mediator in an analyte-detection redox system, thereby forming a chemical potential gradient of the analyte or mediator between the two electrodes After the gradient is established, the applied potential or current is discontinued and an analyte-independent signal is obtained from the relaxation of the chemical potential gradient. The analyte-independent signal is used to correct the analyte-dependent signal obtained during application of the potential or current. This correction allows an improved measurement of analyte concentration because it corrects for device-specific and test specific factors such as transport (mobility) of analyte and/or mediator, effective electrode area, and electrode spacing (and as a result, sample volume), without need for separate calibration values. The analysis can be performed using disposable test strips in a hand held meter, for example for glucose testing. | 03-26-2015 |
| 20150101937 | ELECTROCHEMICAL SENSING USING VOLTAGE-CURRENT TIME DIFFERENTIAL - A device for signal processing. The device includes a signal generator, a signal detector, and a processor. The signal generator generates an original waveform. The signal detector detects an affected waveform. The processor is coupled to the signal detector. The processor receives the affected waveform from the signal detector. The processor also compares at least one portion of the affected waveform with the original waveform. The processor also determines a difference between the affected waveform and the original waveform. The processor also determines a value corresponding to a unique portion of the determined difference between the original and affected waveforms. The processor also outputs the determined value. | 04-16-2015 |
| 20150114848 | method and devices for operating a heatable exhaust-gas sensor - In a method for operating a heatable exhaust-gas sensor, which supplies at least one measuring signal and in which a sensor heater is operated using a pulse-width modulated operating voltage, the detection of the at least one measuring signal has priority over the supply of the pulse-width modulated operating voltage for sensor heater, and at least during a predefined time window in which the measuring signal is detected, the supply of the pulse-width modulated operating voltage for the sensor heater is suppressed using a blocking signal. | 04-30-2015 |
| 20150144504 | ELECTROCHEMICAL DETECTION SYSTEM AND METHOD OF OPERATION - An electrochemical detection system for determining a concentration of a gas in exhaust gases of a combustion process. The system includes an electrolyte, a reference electrode, and a sense electrode that cooperate to form an electrochemical sensor that exposes both the reference electrode and the sense electrode to the exhaust gases. The electrochemical sensor is configured to output a sensor signal indicative of a species concentration of a species gas in the exhaust gases. The sensor signal exhibits a transient error in response to a change in a reference concentration of a reference gas in the exhaust gases. The processor is configured to determine the species concentration based on the sensor signal, and to determine an estimate of the transient error based on an operating condition of the combustion process. | 05-28-2015 |
| 20150346140 | HYDROGEN QUALITY MONITOR - A pair of fuel cells are configured as a hydrogen purity monitor. A first cell, acting as a reference cell, is configured to generate electrical current from the electrochemical reaction of hydrogen and oxidant and has a first fuel inlet configured to receive hydrogen from a first hydrogen source. A second fuel cell, acting as a test cell, is configured to generate electrical current from the electrochemical reaction of hydrogen and oxidant and has a second fuel inlet configured to receive hydrogen from a second hydrogen source. A control system is configured to apply an electrical load to each fuel cell and determine an electrical output of each fuel cell. The control system has a comparator for comparing the electrical outputs of the first and second fuel cells and a purity monitor output configured to give an indication of hydrogen purity based on an output of the comparator. | 12-03-2015 |
| 20150355135 | ELECTROCHEMICAL DETECTION SYSTEM AIR WASHING - Some embodiments include a platform for performing a plurality of assays. The platform may include a support structure that further includes a plurality of channels in selective fluid flow communication with at least one flow cell. The platform may also include a plurality of sensors operatively associated with the flow cell so that the sensors are configured to detect a reaction during the performance of the plurality of assays. The channels are in selective fluid flow communication with an air source so that these channels can guide a volume of air into the flow cell during the performance of the plurality of assays to wash the sensors between successive applications of solutions required to develop the assay complex which is subsequently detected. | 12-10-2015 |
| 20150355140 | ELECTROCHEMICAL MEASUREMENT DEVICE - A flow cell for electrochemical measurement which introduces a sample solution, applies a voltage between a working electrode and a counter electrode to analyze the sample solution electrochemically, discharges the sample solution, and performs the electrochemical measurement continuously. The flow cell includes a unit which measures a value of a current flowing between electrodes at the time of applying a voltage, a unit which records the measured current value, a unit which compares the recorded current value with a current value set separately as a determination standard, and a unit which determines whether the current value measured at a cycle of a determination target and the recorded current value is normal by the comparison. | 12-10-2015 |
| 20160018356 | INTEGRATED SMO GAS SENSOR MODULE - Miniature resistive gas detectors incorporate thin films that can selectively identify specific gases when heated to certain characteristic temperatures. A solid state gas sensor module is disclosed that includes a gas sensor, a heater, and a temperature sensor, stacked over an insulating recess. The insulating recess is partially filled with a support material that provides structural integrity. The solid state gas sensor module can be integrated on top of an ASIC on a common substrate. With sufficient thermal insulation, such a gas detector can be provided as a low-power component of mobile electronic devices such as smart phones. A method of operating a multi-sensor array allows detection of relative concentrations of different gas species by either using dedicated sensors, or by thermally tuning the sensors to monitor different gas species. | 01-21-2016 |
| 20160025666 | ELECTRIC FIELD SENSOR - According to embodiments, an electric field sensor having a sensor electrode is constructed of an electrically conductive material and having one or more outwardly protruding pillars. A screen electrode overlies the sensor electrode and has one or more openings which register with the one or more pillars on the sensor electrode. At least one piezoelectric actuator is connected to the screen electrode so that, when excited by a voltage signal, the piezoelectric actuator modulates the screen electrode toward and away from the sensor electrode at the frequency of the periodic voltage signal. An output circuit configured to detect a voltage, a current output, or both, between the sensor electrode and the screen electrode which is proportional in magnitude to the strength of the electric field. | 01-28-2016 |
| 20160047774 | COMPACT MICROELECTRONIC INTEGRATED GAS SENSOR - A compact microelectronic gas sensor module includes electrical contacts formed in such a way that they do not consume real estate on an integrated circuit chip. Using such a design, the package can be miniaturized further. The gas sensor is packaged together with a custom-designed Application Specific Integrated Circuit (ASIC) that provides circuitry for processing sensor signals to identify gas species within a sample under test. In one example, the output signal strength of the sensor is enhanced by providing an additional metal surface area in the form of pillars exposed to an electrolytic gas sensing compound, while reducing the overall package size. In some examples, bottom side contacts are formed on the underside of the substrate on which the gas sensor is formed. Sensor electrodes may be electrically coupled to the ASIC directly, or indirectly by vias. | 02-18-2016 |
| 20160091449 | Analyte Test Strip and Analyte Meter Device - A test strip with an incorporated optical waveguide and deflectors punched through the optical waveguide allows light to exit through a layer of the test strip and be detected by a photo detector. Using light and a photodetector, these uniquely coded strips are identified. The waveguide can be constructed by sandwiching two layers of the test strip around a light transmissible layer. This configuration allows light to be transmitted through the test strip and out the other end, as well as allowing some light to escape the deflector. This light is detected by a photodetector mounted in the analyte test meter. The deflectors may be placed in patterns such that detection of this light indicates certain characteristics of the strip, such as non-counterfeit, regional identification, type of analyte tested, and coding information. | 03-31-2016 |
| 20160097742 | Method for Detection of Analytes - Embodiments provide analyte detection methods, techniques and processes for detecting the presence of one or more analytes in one or more samples. In a detection method, a sample and a sensor compound is introduced into a channel. A first potential difference is applied across the length of the channel in a first direction, and a first electrical property value is detected. Subsequently, a second potential difference is applied across the length of the channel in a second opposite direction, and a second electrical property value is detected. Presence or absence of an analyte in the channel is determined based on a comparison between the first and second electrical property values. | 04-07-2016 |
| 20160154307 | Photolithography for Making Electrochemical Measurements | 06-02-2016 |
| 20160178559 | UNIVERSAL STRIP PORT CONNECTOR | 06-23-2016 |
| 20160187288 | NANOFLUID SENSOR WITH REAL-TIME SPATIAL SENSING - A semiconductor structure capable of real-time spatial sensing of nanoparticles within a nanofluid is provided. The structure includes an array of gate structures. An interlevel dielectric material surrounds the array of gate structures. A vertical inlet channel is located within a portion of the interlevel dielectric material and on one side of the array of gate structures. A vertical outlet channel is located within another portion of the interlevel dielectric material and on another side of the array of gate structures. A horizontal channel that functions as a back gate is in fluid communication with the vertical inlet and outlet channels, and is located beneath the array of gate structures. A back gate dielectric material portion lines exposed surfaces within the vertical inlet channel, the vertical outlet channel and the horizontal channel. | 06-30-2016 |
| 20170234743 | TEMPERATURE ANALYSIS WITH VOLTAGE-CURRENT TIME DIFFERENTIAL OPERATION OF ELECTROCHEMICAL SENSORS | 08-17-2017 |
| 20170234830 | ELECTROLYTE-GATED TRANSISTORS FOR DETECTION OF MOLECULES | 08-17-2017 |
| 20180021775 | FERRO-MAGNETIC SHAPE MEMORY ALLOY MICROCAVITY FLUID SENSOR | 01-25-2018 |
| 20180024089 | Nanoparticle-Based Gas Sensors and Methods of Using the Same | 01-25-2018 |
| 20180024090 | FORMALDEHYDE DETECTING APPARATUS, AND AIR TREATMENT APPARATUS HAVING THE SAME | 01-25-2018 |
| 20180024093 | CONTROLLER AND ABNORMALITY DETECTING METHOD OF AIR-FUEL-RATIO SENSOR | 01-25-2018 |
