| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 205781000 | Including nitrogen oxide (e.g., gaseous nitrogen dioxide, dissolved sodium nitrate, etc.) | 41 |
| 20080223734 | NITRIC OXIDE SENSOR - Electrodes comprising ruthenium oxide nanoparticles are disclosed. The ruthenium oxide nanoparticles are located within the electrode or as a coating thereon. The electrode is especially suited for measuring the presence and/or concentration of nitric oxide in a sample. | 09-18-2008 |
| 20080237064 | METHOD OF CORRECTING OUTPUT OF NOx SENSOR - A method of correcting an output of a NOx sensor including: a first step of obtaining a sensor-variation relational expression based on a relationship between an Ip2/Ip0 value and an output change percentage for a calibration sensor; a second step of obtaining, from the relational expression, an output change percentage β that corresponds to an Ip2/Ip0 value of a subject NOx sensor; a third step of calculating a pressure correction coefficient α based on the obtained β; and a fourth step of performing output correction on the subject NOx sensor by calculating the pumping current Ip | 10-02-2008 |
| 20080296174 | System and Method for Improving Accuracy of a Gas Sensor - An electrochemical gas sensor and methods of operating an electrochemical gas sensor are disclosed. In one embodiment, an electrochemical gas sensor comprising a measuring electrode pair configured to measure a gas species and a pumping electrode pair configured to reduce an amount of an interfering species in a sample in the electrochemical gas sensor is operated by obtaining a measurement of the interfering species at a location spatially adjacent to a measuring electrode of the measuring electrode pair, and adjusting one or more of an operation or an output processing of the electrochemical gas sensor based on the measurement of the interfering species. | 12-04-2008 |
| 20090065370 | AMMONIA GAS SENSOR METHOD AND DEVICE - A mixed potential sensor device and methods for measuring total ammonia (NH | 03-12-2009 |
| 20090078587 | Method of Sensor Conditioning for Improving Signal Output Stability for Mixed Gas Measurements - A method of sensor conditioning is proposed for improving signal output stability and differentiation between responses to different gases such as exhaust from combustion processes. DC (or saw tooth) voltage pulses of opposite polarity and equivalent amplitude are applied between sensor electrodes. Pulses are separated by pauses, when charging power supply is disconnected from the sensor and sensor discharge is recorded. Useful information regarding concentration of analyzed gases can be extracted from two measurement methods:
| 03-26-2009 |
| 20090139877 | COMPOSITION FOR USE IN A NOX ELECTRODE, METHOD OF MAKING THE SAME, ARTICLES DERIVED THEREFROM, AND METHOD OF DETECTING NOX - Disclosed herein is a composition for use in a NOx electrode comprising: | 06-04-2009 |
| 20090152130 | Gas sensor and method for detecting particles in a gas flow - A gas sensor 10 for detecting particles in a gas stream has a first electrochemical pump cell 14, which has a measuring chamber 16 in which a first electrode 18 is disposed to pump particles between the first measuring chamber 16 and the gas stream. Furthermore, a second electrochemical pump cell 20 is provided, which has a second measuring chamber 22 in which a second electrode 24 is disposed so as to pump particles. According to the invention, the second measuring chamber 22 is connected to the gas stream via an absorber medium 34 for absorption of the particles to be detected. This makes it possible to absorb the particles to be detected in a first operating mode using the absorber medium 34, and to desorb the absorbed particles in a second operating mode, and to detect the quantity of the desorbed particles. Thus, the gas sensor 10 is able to take even low concentrations into account, and short-term measuring errors do not have such a serious effect. | 06-18-2009 |
| 20090188813 | NOx SENSOR AND PRODUCTION METHOD THEREOF - A NOx sensor includes a sensor element equipped with first and second pumping cells to define first and second measurement chambers. The first pumping cell exerts an oxygen pumping action against the first measurement chamber to adjust the oxygen concentration in the gas under measurement within the first measurement chamber to a given level. The second pumping cell exerts an oxygen pumping action against the second measurement chamber to produce a pumping cell current according to the NOx concentration in the gas under measurement. When the moisture content of the gas under measurement changes from 2 vol % to 8 vol %, the NOx sensor allows a variation of NOx concentration detection value based on the pumping cell current in such a manner that the NOx concentration detection value reaches a transient peak value of 20 ppm or smaller and converges to ±5 ppm of a reference value within 5 seconds. | 07-30-2009 |
| 20090242426 | Gas Sensor - Presented is a gas sensor and method for detecting the quantity of a measurement gas contained in a gas mixture. The sensor includes a prechamber, a first pump device disposed in the prechamber configured to set the partial pressure of a free gas component of a detection gas to a predetermined value, and a measuring chamber separated from the prechamber by a diffusion barrier. The measuring chamber includes a detection device configured to determine the concentration of the detection gas. The sensor further includes an inlet chamber separated from the prechamber by a diffusion barrier, a second pump device disposed in the inlet chamber configured to set the partial pressure of the free gas component of the detection gas to a predetermined value, and a third pump device disposed in the measuring chamber and configured to set the partial pressure of the free gas component to a predetermined value. | 10-01-2009 |
| 20090242427 | GAS SENSOR, CONTROL DEVICE THEREOF AND METHOD OF MEASURING NOx CONCENTRATION - A gas sensor for measuring NOx concentration in measurement gas based on sensor output depending on an amount of detected oxygen includes an oxygen concentration control part for controlling oxygen concentration in the measurement gas. The oxygen concentration control part allows a control of oxygen concentration in the measurement gas to set at a designated value even after being mounted on an automobile, so that dependency of the sensor output with respect to oxygen concentration can be quantitatively detected. The sensor output for detecting NOx concentration is corrected by estimating an amount of a change accompanying the sensitivity degradation of the sensor output with respect to NOx concentration on the basis of a difference between oxygen output characteristics of the sensor output of an actually-used sensor and oxygen output characteristics of a sensor in the initial state, and correcting the sensor output in accordance with the amount of the change. | 10-01-2009 |
| 20090277806 | ELECTROCHEMICAL CELL SYSTEM GAS SENSOR - The present invention is an electrochemical cell system gas sensor that detects a subject substance to be detected using an electrochemical reaction system and comprises an ion conduction phase and at least two kinds of electrode facing each other and contacting the ion conduction phase, an electrode structure thereof comprising a chemical detection electrode layer having a selective adsorption characteristic relative to the subject substance to be detected and at least one reference electrode layer serving as a counter electrode to the chemical detection electrode layer, a manufacturing method thereof, and a method of detecting the subject substance to be detected, the present invention provides a chemical detection system having an extremely high response speed and great detection ability irrespective of high or low temperatures and even in the presence of excessive oxygen that impairs the chemical reaction of the subject substance to be detected. | 11-12-2009 |
| 20090288961 | COMPACT ELECTROCHEMICAL BIFUNCTIONAL NOx/O2 SENSORS WITH INTERNAL REFERENCE FOR HIGH TEMPERATURE APPLICATIONS - A bifunctional total NO | 11-26-2009 |
| 20090321279 | DIAGNOSIS OF A CRACKED MULTI-CHAMBER SOLID-ELECTROLYTE GAS SENSOR - A diagnosis method and a gas sensor that is adapted to perform the diagnosis method are described for detecting a damage of a gas sensor causing a malfunction, particularly a crack, wherein the gas sensor has at least two chambers with one chamber comprising a reference gas. The method includes pumping out gas of one of the chambers, measuring a value of a variable being proportional to the concentration of the gas as a function of time, comparing the measured variable value and/or the measured time to a predetermined threshold, detecting a damage of the sensor if the measured variable value and/or the measured time is outside the interval of normal mode of operation defined by the corresponding predetermined threshold. | 12-31-2009 |
| 20100000882 | Detection of Explosive Materials - Among other things, methods and systems are described for detecting chemicals including explosive materials. For example, a system for detecting materials includes a sample gathering unit designed to obtain a portion of a target material to be tested. In addition, the system includes a sample holding unit that has a first end designed to attach to the sample gathering unit and form a housing that retains at least the obtained portion of the target material. Further, a reagent holding unit is included and designed to attach to a second end of the sample holding unit. The reagent holding unit is designed to introduce the reagent into the formed housing to mix with the obtained target material and start a chemical reaction. | 01-07-2010 |
| 20100032318 | SYSTEM AND METHOD FOR AMMONIA AND HEAVY HYDROCARBON (HC) SENSING - A gas measurement system includes a sensor element and an associated electronic control unit (ECU) or the like connected thereto for receiving sensor element emf outputs. The ECU is configured to provide output signals or parameters indicative of ammonia and heavy HC gas concentrations. The sensor element has an NH | 02-11-2010 |
| 20100051480 | NITRIC OXIDE MICROSENSORS VIA FLUOROSILANE-BASED XEROGEL MEMBRANES - The presently disclosed subject matter relates to sensors for measuring an amount of a gaseous species in a sample. The sensors comprise a gas permeable polysiloxane network membrane, comprising both alkyl and fluorinated alkyl groups. In some embodiments, the polysiloxane network can be formed from the co-condensation of a mixture of an alkylalkoxysilane and a fluorosilane. The presently disclosed subject matter also relates to methods of making the sensors, methods of selectively measuring an amount of a gaseous species, such as nitric oxide, in a sample, and to compositions comprising the polysiloxane networks. | 03-04-2010 |
| 20100089772 | NANOMATERIAL-BASED GAS SENSORS - A gas sensing device (nanosensor) includes a substrate with at least a pair of conductive electrodes spaced apart by a gap, and an electrochemically functionalized semiconductive nanomaterial bridging the gap between the electrodes to form a nanostructure network. The nanomaterial may be single-walled carbon nanotubes (SWNTs) functionalized by the deposition of nanoparticles selected from the group consisting of an elemental metal (e.g., gold or palladium), a doped polymer (e.g., camphor-sulfonic acid doped polyaniline), and a metal oxide (e.g. tin oxide). Depending on the nanoparticles employed in the functionalization, the nanosensor may be used to detect a selected gas, such as hydrogen, mercury vapor, hydrogen sulfide, nitrogen dioxide, methane, water vapor, and/or ammonia, in a gaseous environment. | 04-15-2010 |
| 20100108540 | APPARATUS AND PROCESS FOR GAS SENSOR CONTROL - A gas sensor control apparatus includes a heater regulating section to control the supply of electricity to a heater included in a gas sensor, an impedance sensing section to sense an impedance of a cell of the gas sensor, and an impedance condition examining section to examine whether the sensed impedance is greater than or equal to a predetermined abnormality judging threshold. The control apparatus further includes a voltage condition examining section to examine whether a maximum effective voltage is applied to the heater, when the impedance is above the predetermined abnormality judging threshold, a duration measuring section to examine whether an application time duration of the maximum effective voltage becomes equal to or longer than a predetermined heater overheat preventing time, and a voltage decreasing section to decrease the heater application voltage to such a lower effective voltage as to hold the temperature of the cell higher than or equal to 500° C. when the application time duration reaches the predetermined heater overheat preventing time. | 05-06-2010 |
| 20100200430 | GAS SENSOR DEVICES COMPRISING ORGANIZED CARBON AND NON-CARBON ASSEMBLY - This invention relates generally to gas sensors comprising organized assemblies of carbon and non-carbon compounds. The invention also relates to devices containing such gas sensors and analysis units. In preferred embodiments, the organized assemblies of the instant invention take the form of nanorods or their aggregate forms. More preferably, a nanorod is made up of a carbon nanotube filled, coated, or both filled and coated by a non-carbon material. | 08-12-2010 |
| 20100230297 | GAS SENSOR FOR MEASURING A GAS COMPONENT IN A GAS MIXTURE - A ceramic gas sensor for measuring a gas component in a gas mixture, which includes a sensor element, which has at least one first electrode exposed to the gas mixture to be determined, and at least one further electrode. Only one shared electrical contacting is provided for the first electrode and for the additional electrode, an electrical resistor, which is situated inside the gas sensor, being preconnected to the first electrode and/or the additional electrode. | 09-16-2010 |
| 20100314264 | METHOD OF CORRECTING NOx SENSOR AND NOx-SENSING DEVICE - A method of correcting NO | 12-16-2010 |
| 20110048970 | METHOD AND APPARATUS FOR CONTROLLING MULTI-GAS SENSOR - A method and apparatus for controlling a multi-gas sensor, including an NO | 03-03-2011 |
| 20110089051 | DEVICES AND METHODS FOR DETERMINATION OF SPECIES INCLUDING CHEMICAL WARFARE AGENTS - The application generally describes devices, systems, and methods for determination of one or more analytes. Embodiments described herein may be useful as sensors for analytes such as explosives, chemical warfare agents, and/or toxins. In some cases, chemiresistor or chemFET sensor devices for monitoring volatile organics, especially chemical warfare agents such as sarin, are described. Some embodiments comprise functionalised carbon nanotube/conjugated polymer composites (6) as sensing material. In some embodiments, the polymer is poly(3-hexylthiophene), 3PHT, optionally substituted with calixarenes, or hexafluoroisopropanol susbstituted polythiophene, HFIP-PT. Biosensing embodiments are also described, as well as methods of manufacturing the devices. | 04-21-2011 |
| 20110100842 | METHOD FOR DIAGNOSING A NOX READINGS RECORDER - Method for diagnosing a NOx readings recorder which acquires a NOx concentration in an exhaust gas tract of an internal combustion engine and comprises two measuring chambers ( | 05-05-2011 |
| 20110240487 | METHOD OF PROCESSING SENSOR ELEMENT AND SENSOR ELEMENT - A method of processing a sensor element includes the steps of: (a) preparing a gas atmosphere containing hydrocarbon, having an air-fuel ratio of 0.80 to 0.9999, and having a small amount of oxidizing gas added thereto; and (b) subjecting a sensor element to a heat treatment in the gas atmosphere at a temperature of 500° C. or higher for 15 minutes or longer. The sensor element includes an electrochemical pumping cell constituted of an oxygen-ion conductive solid electrolyte and an electrode having a NOx reduction ability. A NOx gas in a measurement gas is reduced or decomposed in the electrode. A NOx concentration in the measurement gas is obtained based on a current which flows in the electrochemical pumping cell at a time of the reduction or decomposition. | 10-06-2011 |
| 20110290672 | ELECTROCHEMICAL GAS SENSOR - An electrochemical gas sensor for detecting ozone or nitrogen dioxide in a gas sample has a measuring electrode ( | 12-01-2011 |
| 20120097553 | METHOD FOR MEASURING AND/OR CALIBRATING A GAS SENSOR - A method for measuring and/or calibrating a gas sensor for determining oxygenic gas components in gas mixtures in exhaust gases of internal combustion engines. The gas sensor has one internal pump electrode IPE, one external pump electrode APE and one decomposition electrode NOE. The measurement and/or calibration may be carried out during the ongoing operation of the gas sensor by removing the gas component and/or oxygen from one of the chambers, by introducing oxygen in a controlled manner into one of the chambers with the aid of electrochemical pumping processes. The changes caused by the introduced oxygen are measured against an additional electrode and the gas sensor may be measured and/or calibrated using the measured values. | 04-26-2012 |
| 20120211374 | NOx CONCENTRATION DETECTION APPARATUS AND NOx CONCENTRATION DETECTION METHOD - An apparatus and method for individually detecting NO and NO | 08-23-2012 |
| 20130161205 | METHODS AND DEVICES FOR DETECTING NITROGEN OXIDES - A method for detecting nitrogen oxides, the method comprising monitoring the change in potential difference between a working electrode and a reference electrode as the working electrode is exposed to nitrogen oxides, where the working electrode includes an inorganic non-metallic oxide selected from spinel-structured compounds and wolframite-structured compounds, and where the working electrode and the reference electrode are in contact with a solid electrolyte. | 06-27-2013 |
| 20130220834 | Method and Device for Detecting at Least one Property of a Gas - A method for detecting at least one property of a gas in a measuring gas chamber, in particular for detecting at least one gas component of the gas. The at least one property is determined using at least one electrochemical measuring cell of a sensor element. Temperatures are detected at at least two different locations of the sensor element and used in determining the at least one property. | 08-29-2013 |
| 20140131223 | INTEGRATED OPTOELECTROCHEMICAL SENSOR FOR NITROGEN OXIDES IN GASEOUS SAMPLES - A gas-phase detection system based on detecting optochemical and optoelectrochemical signals. The sensing platform is particularly powerful for detection of nitrogen oxides at low ppbV concentrations. The optochemical analysis is based on the color development due to a chemical reaction taking place in an optimized material. The electrochemical analysis can be based on the doping level or redox potential changes of an electrochemical sensor; and optoelectrochemical detection can be based on a combination of the electrochemical and optoelectrochemical methodologies. Each independent signal can be simultaneously detected, increasing the reliability of detection. | 05-15-2014 |
| 20140197043 | METHODS AND APPARATUS FOR MEASURING NITRIC OXIDE IN FLUID - An exemplary apparatus for measuring nitric oxide in a fluid includes a sample injection port; a pump and reservoir; a valve; a measurement chamber; an electromagnetic radiation source; controls and user interface; and a cartridge. The cartridge includes a sample chamber a mix chamber; a sample degassing chamber; and a planar reaction chamber. The cartridge preferably is single-use and disposable. Furthermore, additional inventive aspects and features are disclosed related to measuring nitric oxide in a fluid. | 07-17-2014 |
| 20140197044 | MEASURING NITRIC OXIDE IN FLUID - Apparatus and methods in accordance with one or more preferred embodiments of the present invention are used to measure nitric oxide in a fluid, and each includes a sample injection port; a pump; a measurement chamber; an electromagnetic radiation source; one or controls and user interfaces; and a cartridge. The cartridge includes a sample chamber; an electromagnetic radiation and heat chamber; and a gas permeable membrane. The cartridge preferably is single-use and disposable. Further apparatus and methods in accordance with other alternative embodiments, and additional inventive aspects and features, are disclosed related to measuring nitric oxide in a fluid. | 07-17-2014 |
| 20140305810 | APPARATUS AND METHOD FOR DIAGNOSTIC GAS ANALYSIS - A handheld, small but accurate and reliable device for diagnostic NO measurements using a NO sensor, where the parameters governing the taking of the sample are different from the parameters optimal for the accuracy of said NO sensor. By temporarily storing a portion of the exhaled air, and feeding this to the sensor at a flow rate adapted to the NO sensor, the accuracy and sensitivity of a system/method involving NO sensors, in particular electrochemical NO sensors, can be increased. The method for diagnostic NO measurements comprises steps for controlling the inhalation of NO free air, as well as the exhalation, both by built-in means and by audible and/or visual feedback to the patient. | 10-16-2014 |
| 20150293052 | METHOD FOR OPERATING A SOLID ELECTROLYTE SENSOR ELEMENT CONTAINING A PUMP CELL - A method is described for operating a sensor element for detecting at least one concentration of a gas in a measuring gas chamber. The sensor element includes at least one pump cell having at least two pump electrodes connected to each other by at least one solid electrolyte. At least one measuring variable is detected in the method, and at least one compensating variable is determined. The compensating variable is at least partially dependent on capacitive effects on at least one junction between at least one of pump electrodes and the solid electrolyte. At least one corrected measuring variable is determined from the measuring variable and the compensating variable. The concentration of the gas in the measuring gas chamber is determined from the corrected measuring variable. | 10-15-2015 |
| 20150338368 | ELECTROCHEMICAL SENSOR - An electrochemical ion sensor and a method for sensing a presence of at least one ion species in a solution are provided. The electrochemical sensor includes a solid-state electrolyte medium doped with an organometallic material, having an electrochemical affinity with the ion species, and a pair of electrodes electrically contacting the solid-state electrolyte. The electrochemical sensor also includes an electrical circuit configured to drive the pair of electrodes with an AC electrical excitation and to measure at least one parameter related to a complex electrical impedance of the doped solid-state electrolyte medium in response to the AC electrical excitation. The parameter may be an electrical resistance, an inductance or a combination of both, and represents the presence of the ion species in the solution when the solid-state electrolyte medium is exposed to the solution. | 11-26-2015 |
| 20160011135 | DEVICES AND METHODS FOR DETERMINATION OF SPECIES INCLUDING CHEMICAL WARFARE AGENTS | 01-14-2016 |
| 20160033438 | Paper-Based Reference Electrode And Potentiometric Ion Sensing - Microfluidic, electrochemical devices are described. The microfluidic, electrochemical device may include a sample zone on a first porous, hydrophilic layer, a reference zone and a microfluidic channel, wherein the microfluidic channel provides for predominantly diffusive fluid communication between the sample zone and the reference zone; (therefore realizing a similar function of a reference electrode), a fluid-impermeable material that defines each of the sample zone, reference zone and microfluidic channel, a first electrode in fluid communication with the sample zone and a second electrode in fluid communication with the reference zone. Also described are microfluidic, electrochemical devices containing an ion-selective membrane for potentiometric ion sensing. | 02-04-2016 |
| 20160077044 | AMPEROMETRIC ELECTROCHEMICAL SENSORS, SENSOR SYSTEMS AND DETECTION METHODS - An amperometric electrochemical sensor for measuring the concentrations of two or more target gas species in a gas sample or gas stream, wherein the sensor includes first and second electrochemical cells having respective first and second active electrodes, the electrochemical cells further including an electrolyte membrane and a counter electrode, wherein the first electrochemical cell exhibits an additive response with respect to a first and second ones of the target gas species and the second electrochemical cell exhibits a selective response to the first target gas species in the presence of the second target gas species such that the sensor is capable of measuring the respective concentrations of the first and second target gas species. | 03-17-2016 |
| 20160123920 | NITROGEN OXIDE DECOMPOSITION MATERIAL AND USE THEREOF - The present teaching rekates to providing a NOx decomposition agent having an excellent NOx decomposition rate. The NOx decomposition agent containing a perovskite oxide represented by ABx-1MxO | 05-05-2016 |
| 20170234828 | GAS STREAM ANALYSIS USING VOLTAGE-CURRENT TIME DIFFERENTIAL OPERATION OF ELECTROCHEMICAL SENSORS | 08-17-2017 |
