Class / Patent application number | Description | Number of patent applications / Date published |
422098000 | Analysis based on electrical measurement | 17 |
20080226505 | Gas Sensor Assembly With Catalytic Element - A gas sensor assembly comprising a gas-sensitive element, and a first pulse modulation circuit comprising a first switching device is disclosed. The gas-sensitive element and the first switching device are arranged in series with a power supply. The first pulse modulation circuit further comprises a first control module adapted to control the first switching device in accordance with a monitored parameter of the gas-sensitive element, the parameter varying with the temperature of the element, thereby controlling the power consumed from the power supply by the gas-sensitive element. | 09-18-2008 |
20080317636 | 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. | 12-25-2008 |
20090208376 | PHOTO-CATALYST OZONE DETECTOR - A photo-catalyst ozone detector includes a base. A positive electrode and a negative electrode are respectively disposed on the base. A photo-catalyst coating is disposed on the base for connecting the positive electrode and the negative electrode, and reacting with the ozone to detect ozone consistency, wherein the photo-catalyst coating contains titanium dioxide. | 08-20-2009 |
20090246084 | Gas Sensor - A gas sensor has a gas-sensitive layer with a surface area where the electron affinity depends on the concentration of a target gas brought in contact with the surface area. An electrical potential sensor is capacitively coupled to the surface area via an air gap. The surface area of the gas-sensitive layer is covered by an electric insulating layer that is inert to the target gas and is bonded to the gas-sensitive layer. The coating is designed in such a way that it is permeable for the target gas and a different, non-target gas that can be adsorbed on the surface area. The coating has different diffusion constants for the target gas and the non-target gas. The diffusion constants are coordinated with each other in such a way that the sensitivity of the gas sensor to the target gas increases when the target gas concentration exceeds a predetermined concentration threshold in the presence of the non-target gas. | 10-01-2009 |
20100098593 | Sensitive Materials for Gas Sensing and Method of Making Same - A gas detection device comprising a measuring circuit, said measuring surface comprising a substrate, a resistance heater bonded to said substrate and a coating, said coating comprising SnO | 04-22-2010 |
20100166614 | HYDROGEN-GAS CONCENTRATION SENSOR AND HYDROGEN-GAS CONCENTRATION MEASURING DEVICE - A hydrogen-gas concentration sensor comprises a substrate, and a plurality of hydrogen detecting films formed on the substrate, adjacent to one another. The hydrogen detecting films have a thin film layer, and a catalyst layer formed on the thin film layer. Each catalyst layer, when in contact with a hydrogen gas, exerts photocatalysis to hydrogenate each thin film layer reversibly and causes the electric resistance value thereof to change reversibly. The individual thin film layers have different sensitivities of a change in the hydrogen gas concentration vs. a change in the resistance value and different hydrogen gas concentration measurement ranges. The hydrogen-gas concentration sensor measures the hydrogen gas concentration with a thin film layer having a high sensitivity when the hydrogen gas concentration is low, and measures the hydrogen gas concentration with a thin film layer having a wide measurement range when the hydrogen gas concentration is high. | 07-01-2010 |
20100272611 | Gas Sensor With Improved Selectivity - The present invention relates to a gas sensor ( | 10-28-2010 |
20100272612 | Vapor Sensor Materials Having Polymer-Grafted Conductive Particles - A composition for sensor films is provided that detects chemical analytes within sensors, such as polymer-absorption chemiresistors (i.e., conductometric sensors). The disclosure provides robust sensor film compositions that have low resistance, high conductivity, and greater temperature stability and sensitivity to chemical analytes. Methods of making these sensor films are also provided. Sensor film compositions include a matrix having a polymer resin and a plurality of conductive particles comprising a polymer-grafted conductive particle. Blends of conductive particles are also contemplated. | 10-28-2010 |
20120009089 | THIN-FILM HIGH-ACTIVITY GAS SENSOR USING CORE-SHELL STRUCTURED COMPOSITE NANOPARTICLES AS SENSING MATERIAL AND METHOD OF MANUFACTURING THE SAME - Disclosed herein is a thin-film high-activity gas sensor, the sensitivity, selectivity and long-term stability of which can be greatly improved, the manufacturing process of which can be simplified, and which can be formed into a thin film and be miniaturized. | 01-12-2012 |
20120282142 | GAS SENSOR - Volatile organic compounds or oxidizing gases are detected when the work function of a metal-organic framework is measured to produce a sensor signal. | 11-08-2012 |
20130058831 | CATALYTIC COMBUSTION TYPED GAS SENSOR - Provided is a catalytic combustion typed gas sensor of detecting a combustible gas having a concentration equal to or more than a predetermined value based on a raised electric resistance. Herein, combustion heat generated when a combustible gas contacts to a catalytic metal (or detection element) heated by passing electric current therethrough raises a temperature and electric resistance of the catalytic metal. The electric current is made to pass through the catalytic metal such that the temperature of the catalytic metal becomes a standby temperature which is calculated by subtracting the raised temperature portion from a desorption temperature. The combustion heat is generated when the combustible gas contacts to the catalytic metal. Note the catalytic metal adsorbs a silicone compound via a silicon (Si) poisoning process and then desorbs the resulting adsorbed silicone compound at the desorption temperature. The desorption temperature is set in the range over 350° C. to 600° C. | 03-07-2013 |
20150010438 | MOBILE CUSTOM-MADE HAND-HELD CHEMICAL DETECTION DEVICE FOR INTERFACING WITH A SMART DEVICE - A mobile custom-made hand-held chemical detection device interfacing with a smart device. The device includes at least one sensor, a microcontroller, and a Bluetooth module. The at least one sensor detects an associated chemical and generates information in response thereto so as to form chemical detection information. The microcomputer is operatively connected to the at least one sensor and processes the chemical detection information therefrom so as to form processed chemical detection information. The Bluetooth module is operatively connected to the microcontroller and the smart device, and communicates the processed chemical detection information from the microcontroller to the smart device for interpretation. | 01-08-2015 |
20150308995 | ANALYTE DETECTORS AND METHODS FOR THEIR PREPARATION AND USE - Embodiments described herein provide for gas detectors and methods for their preparation and use. Some embodiments provide for a gas detection film including an insulating base layer, a conducting layer including a plurality of conductive clusters having a known degree of percolation below a percolation threshold; and a non-conductive reactant layer between the insulating base layer and the conducting layer. Some embodiments described in this document also provide for methods of making a gas detection film, methods of detecting a detectable gas, and kit for detecting a detectable gas. In some embodiments, the detectable gas may include mercury vapor, water vapor, formaldehyde or a combination thereof. | 10-29-2015 |
20150362469 | Methods and Apparatus for Artificial Olfaction - In exemplary implementations of this invention, an electronic olfactor determines whether a scent being tested matches the scent of a positive control. The electronic olfactor can perform this scent matching even in a changing olfactory environment, and even if the positive control scent is a combination of hundreds or thousands of different odorants. No prior training is needed, and no attempt is made to identify a single odorant that is unambiguously responsible for a scent. Instead, a computer compares the total scent pattern of a positive control sample with the total scent pattern of a test sample, across a sweep of many permutations of electrical inputs to scent sensors, to try to find any condition under which the total scent patterns do not match. If such a condition cannot be found, then the computer declares a match between the test and target scents. | 12-17-2015 |
20160109397 | REACTION MATERIAL CARTRIDGE FOR MEASURING OUTDOOR AIR PENETRATION RATE AND DEVICE FOR MEASURING OUTDOOR AIR PENETRATION RATE OF SUBSTRATE, INCLUDING SAME - A device for measuring a penetration rate of outdoor air including humidity or oxygen of a material, and a reaction material cartridge for measuring an outdoor air penetration rate. The device includes a reacting part including a reaction material which reacts upon contact with outdoor air passing through a substrate; a cartridge body which accommodates the reaction part, and which is detachable from a measuring unit for measuring a change corresponding to the contact of the reaction material with the outdoor air; and a shielding means which shields the cartridge body, and which is separated from the cartridge body for contact between the reaction material and the outdoor air. | 04-21-2016 |
20160123941 | REMOTE CHEMICAL DETECTION AND IDENTIFICATION SYSTEMS AND METHODS - A system for detecting the release of a chemical substance includes a release device configured to release a chemical substance into a surrounding environment based on receipt of a control signal; a signaling device configured to transmit the control signal to the release device; and a sensor device configured to detect the chemical substance in the surrounding environment based on an analysis of the surrounding environment. | 05-05-2016 |
20160161458 | FUNCTION DIAGNOSTIC SYSTEM FOR FILTER OF INTERNAL COMBUSTION ENGINE - A function diagnostic system for a filter of an internal combustion engine may be provided. The function diagnostic system may include a PM sensor and an electronic control unit. The electronic control unit may be configured to: calculate a NOx conversion rate in the filter; determine whether a NOx converting function of the filter is normal; execute a sensor regeneration process for removing the PM deposited between an electrodes of the PM sensor; continuously monitor an output value of the PM sensor after a predetermined PM deposition restart time, after execution of the sensor regeneration process is finished; and determine that there is an abnormality in a PM trapping function of the filter, when the output vale of the PM sensor, which has been continuously monitored, is reduced when the electronic control unit determines that the NOx converting function of the filter is in a normal status. | 06-09-2016 |