Class / Patent application number | Description | Number of patent applications / Date published |
204427000 | With gas reference material | 30 |
20080217174 | Gas Sensor - A gas sensor is provided for determining the concentration of a gas component in a measuring gas, in particular for determining the oxygen concentration in the exhaust gas of internal combustion engines, which has an electrode pair situated on a solid-state electrolyte and made up of an outer pump electrode and an inner pump electrode, which is accessible to the measuring gas supplied via a diffusion barrier, the electrode pairs being triggered in a clocked manner and having a potential of varying polarity applied in each clock-pulse period. To improve the measuring precision of the gas sensor without additional electrodes, a cavity is situated between the diffusion barrier and the inner pump electrode, the cavity serving as storage volume for the oxygen pumped through the solid-state electrolyte. | 09-11-2008 |
20090014331 | AMMONIA GAS SENSOR - An ammonia gas sensor which includes a solid electrolyte member ( | 01-15-2009 |
20090050481 | GAS SENSOR WITH INCREASED DURABILITY AND RELIABILITY - A gas sensor is disclosed including a gas-concentration detecting element, a casing accommodating the gas-concentration detecting element, a lead wire delivering a detected voltage potential to an outside, an insulator holding the lead wire in electrical relationship with respect to the housing, a columnar elastic sealing member, air holes formed in the casing for admitting atmospheric air to an inside thereof, and a water repellent filter. The water repellent filter, formed in a cylindrical shape, is disposed between the casing and the insulator, and a cylindrical elastic member is disposed in at least one of an area between the water repellent filter and the casing and another area between the water repellent filter and the insulator. With the casing caulked, the water repellent filter and the cylindrical elastic member are fixed in place. | 02-26-2009 |
20100243446 | GAS CONCENTRATION DETECTING SYSTEM AND GAS SENSING DEVICE HAVING THE SYSTEM - A gas concentration detecting system has a first cell generating electric current at first oxygen sensitivity, a second cell generating current at second oxygen sensitivity and a reference cell generating current at reference oxygen sensitivity. The cells have the same structure except that the second cell has a catalyst layer for removing hydrogen as from measured gas containing oxygen gas. The system determines first corrected current from current of the first cell exposed to measured gas, current of the first cell exposed to inspection gas containing oxygen gas at reference concentration and reference cell current of the reference cell exposed to inspection gas, determines second corrected current from current of the second cell exposed to measured gas, current of the second cell exposed to inspection gas and the reference cell current, and detects concentration of hydrogen gas in measured gas from the corrected currents. | 09-30-2010 |
20100270155 | GAS SENSOR ELEMENT, GAS SENSOR EQUIPPED WITH GAS SENSOR ELEMENT, AND METHOD OF PRODUCING GAS SENSOR ELEMENT - A gas sensor element has a solid electrolyte of an oxygen ion conductivity, a target gas electrode formed on one surface of the solid electrolyte, a reference gas electrode formed on the other surface of the solid electrolyte, a porous diffusion resistance layer through which the target gas passes to reach the target gas electrode, and a catalyst layer formed on an outer surface of the porous diffusion resistance layer. The target gas electrode is formed around the porous diffusion resistance layer. The catalyst layer contains noble metal catalysts. The noble metal catalysts contain at least rhodium and palladium. A content of rhodium is not less than 10 mass % and a content of palladium is not less than 20 mass % to the entire of the noble metal catalysts. | 10-28-2010 |
20110139619 | NOBLE METAL CATALYST POWDER, GAS SENSOR ELEMENT USING NOBLE METAL CATALYST POWDER, AND GAS SENSOR - A noble metal catalyst powder produced by using co-precipitation method is made of noble metal alloy particles containing Pa, Pd, and Rh. The noble metal alloy particles have an average particle size within a range of 0.2 μm to 2.0 μm. A standard deviation in content of each of Pa, Pd, and Rh is not more than 20 mass %. This standard deviation in content of each of Pa, Pd, and Rh is detected at not less than ten detection-points of the noble metal catalyst powder by quantitative elemental analysis. A gas sensor element has the noble metal catalyst powder. An A/F sensor is equipped with the gas sensor element using the noble metal catalyst powder. | 06-16-2011 |
20120018304 | OXYGEN SENSOR ELEMENT AND OXYGEN SENSOR - An oxygen sensor element | 01-26-2012 |
20120279860 | APPARATUS AND METHOD FOR MEASURING HYDROGEN CONCENTRATION IN MOLTEN METALS - The invention concerns a probe for measuring hydrogen comprising a probe body and a hydrogen sensor. The sensor body has 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. | 11-08-2012 |
20130062203 | AMMONIA GAS SENSOR - An ammonia gas sensor ( | 03-14-2013 |
20130075255 | MEMS ELECTROCHEMICAL GAS SENSOR - Disclosed is an electrochemical gas sensor using micro electro mechanical systems (MEMS). The MEMS electrochemical gas sensor includes: a substrate a lower central region of which is etched by a predetermined thickness; a first insulation film formed on the substrate; a heat emitting resistance body formed on the first insulation film; a second insulation film formed on the heat emitting resistance body; a reference electrode formed in an upper central region of the second insulation film; a solid electrolyte formed on the reference electrode; and a detection electrode formed on the solid electrolyte. | 03-28-2013 |
20130075256 | GAS SENSOR ELEMENT, GAS SENSOR, AND PRODUCTION METHOD THEREOF - A gas sensor element includes an insulating ceramic base, a solid electrolyte body, and a heating element. The solid electrolyte body is disposed in an opening of the insulating ceramic base and has a measuring electrode affixed to one of major surfaces thereof and a reference electrode affixed to the other major surface. The measuring electrode is exposed to gas to be measured. The reference electrode is exposed to a reference gas. The heating element works to activate the solid electrolyte body and is mounted on one of opposed surfaces of the insulating ceramic base on the same side as the major surface of the solid electrolyte body on which the reference electrode is disposed. Specifically, the insulating ceramic base is located between the solid electrolyte body and the heating element, thereby ensuring a desired degree of electric insulation between the heating element and the reference electrode. | 03-28-2013 |
20130092537 | GAS SENSOR ELEMENT AND GAS SENSOR - The gas sensor element includes an inner space into which a measurement gas is introduce through a diffusion resistor, a first oxygen pump cell, a second oxygen pump cell and a sensor cell. One of the electrodes formed on the opposite surfaces of the solid electrolyte body of the first oxygen pump cell and one of the electrodes formed on the opposite surfaces of the second oxygen pump cell are disposed opposite to each other across from the inner space. The other electrode of the first oxygen pump cell and the other electrode of the second oxygen pump cell are exposed to a common reference oxygen concentration gas. | 04-18-2013 |
20140042025 | GAS SENSOR - A gas sensor ( | 02-13-2014 |
20140076725 | GAS SENSOR - A gas sensor including a sensor element constituted by an oxygen-ion conductive solid electrolyte as a main component and detecting a predetermined gas component in a measurement gas includes: an external communication part having an opening opened to the outside, and introducing the measurement gas from the outside under a predetermined diffusion resistance; an internal space communicating with the external communication part; a first electrode formed on a surface of the internal space; a second electrode formed in a space different from the internal space; and a pumping cell operable to pump out oxygen existing in the internal space when a predetermined voltage is applied between the first electrode and the second electrode. The thickness of the external communication part is 50% or more and 100% or less of the thickness of the internal space. | 03-20-2014 |
20140190828 | GAS SENSOR ELEMENT AND GAS SENSOR - A first electrode ( | 07-10-2014 |
20140353156 | MICROELECTRODES FOR ELECTROCHEMICAL GAS DETECTORS - An electrochemical gas sensor having an electrode with a catalyst distributed on a porous surface is described. The porous surface can be a polytetrafluoroethylene tape. Alternate embodiments include layered or stacked electrodes. | 12-04-2014 |
20150021181 | HYDROGEN MEASUREMENT SENSOR HAVING JUNCTION STRUCTURE OF SOLID OXYGEN ION CONDUCTOR AND SOLID HYDROGEN ION CONDUCTOR IN MOLTEN METAL - Provided is a hydrogen measurement sensor capable of monitoring a content of hydrogen within molten metal in real-time using an aluminum or magnesium alloy casting method, and, more particularly, a hydrogen measurement sensor having a junction structure of a solid oxygen ion conductor and a solid hydrogen ion conductor in molten metal capable of measuring a content of hydrogen within aluminum-magnesium alloy-molten metal using a new method which generates a fixed concentration of oxygen gas from a solid reference material at a high temperature by replacing a reference material of a standard gas method which is difficult to handle with a solid reference material or external air which is easy to handle or has the same effect as that of the gas reference material by using a feature in which the external air contains a predetermined pressure (0.21 atm) of oxygen. | 01-22-2015 |
20150041319 | GAS SENSOR CONTROL APPARATUS | 02-12-2015 |
20150041320 | GAS SENSOR CONTROL APPARATUS | 02-12-2015 |
20160033447 | GAS SENSOR, METHOD OF PRODUCING CONDUCTIVE PASTE, AND METHOD OF MANUFACTURING GAS SENSOR - A sensing electrode for sensing a predetermined gas component of a measurement gas, which is provided in a mixed-potential gas sensor that measures the concentration of the predetermined gas, component, is formed of a cermet containing a noble metal and an oxygen-ion conductive solid electrolyte. The noble metal comprises | 02-04-2016 |
20160091457 | GAS SENSOR ELEMENT, GAS SENSOR, AND METHOD OF MANUFACTURING GAS SENSOR ELEMENT - A gas sensor element ( | 03-31-2016 |
204428000 | With protective element | 9 |
20150300979 | GAS SENSOR - A gas sensor | 10-22-2015 |
204429000 | Protective element is a layer | 8 |
20080245666 | Sensor Element and Method for Determining the Concentration of Gas Components in a Gas Mixture - A sensor element for the determination of the concentration of gas components in a gas mixture, particularly of the concentration of gas components in the exhaust of internal combustion engines, with two electrode, that together with a solid electrolyte constitute a pumping cell, whose outer pumping electrodes is exposed to the gas mixture by way of a porous protective layer, and with a reference electrode, which is disposed on the solid electrolyte and is exposed to a reference gas, and which with a solid electrolyte and a Nernst electrode constitutes a concentration or Nernst cell, is thereby characterized in that at least periodically the Nernst voltage between the outer pumping electrode and the Nernst electrode is tapped and analyzed. | 10-09-2008 |
20080257732 | GAS SENSOR - There is provided a gas sensor, including a gas sensing film formed of an oxide semiconductor material and a gas-permeable protection layer formed of oxide particles and arranged on the gas sensing film. The oxide particles of the protection layer have an average particle size of 500 nm or smaller. | 10-23-2008 |
20090301878 | AMMONIA SENSOR ELEMENT, METHOD OF MAKING THEREOF, AND AMMONIA SENSOR DERIVED THEREFROM - Disclosed herein is an ammonia sensor element comprising an ammonia selective sensor electrode, a reference electrode, a solid electrolyte in ionic communication with the ammonia selective sensor electrode and the reference electrode, and a protective layer disposed on the ammonia selective sensor electrode, comprising a porous portion comprising an ammonia-inert material. A method of making an ammonia gas sensor element comprises disposing an ammonia selective sensor electrode on and in ionic communication with a solid electrolyte, disposing a reference electrode on and in ionic communication with the solid electrolyte, and disposing a protective layer comprising a porous portion comprising an ammonia-inert material on the ammonia selective sensor electrode. | 12-10-2009 |
20110089032 | GAS SENSOR ELEMENT AND ITS MANUFACTURING METHOD, AND GAS SENSOR EMPLOYING THE GAS SENSOR ELEMENT - A gas sensor element is disclosed which includes a solid electrolyte body, a measurement electrode, a reference electrode, a porous diffusion-resistant layer, a catalyst layer, and a plurality of protective layers. The catalyst layer is provided on an outer surface of the porous diffusion-resistant layer through which a measurement gas is introduced to the measurement electrode. The catalyst layer is comprised of a noble metal catalyst and catalyst-supporting particles. The protective layers are provided in layers on the catalyst layer and comprised of oxide particles. The average particle diameter of the catalyst-supporting particles of the catalyst layer is less than or equal to the average particle diameter of the oxide particles of the one of the protective layers which adjoins the catalyst layer. The further the protective layers are from the catalyst layer, the larger the average particle diameters of the oxide particles of the protective layers are. | 04-21-2011 |
20110094883 | GAS SENSOR ELEMENT - A gas sensor element includes a solid electrolyte body having oxygen ion conductivity, a pair of measurement and reference electrodes respectively provided on an opposite pair of first and second surfaces of the solid electrolyte body, a porous diffusion-resistant layer through which a measurement gas is introduced to the measurement electrode, and a protective layer. The protective layer is provided to cover, at least, an outer surface of the porous diffusion-resistant layer through which the measurement gas flows into the diffusion-resistant layer. The protective layer is hydrophilic at room temperature and water-repellent at high temperatures at which the solid electrolyte body can be activated. | 04-28-2011 |
20130126352 | GAS SENSOR - In a gas sensor | 05-23-2013 |
20130248363 | AMMONIUM GAS SENSOR - An ammonium gas sensor is provided. The ammonium gas sensor includes: a solid electrolyte layer having oxygen ion conductivity; a detection electrode formed on one surface of the solid electrolyte layer; a reference electrode that is a counter electrode of the detection electrode; a selective reaction layer covering the detection electrode; and a protection layer covering the selective reaction layer and made from a porous material; wherein the detection electrode includes a noble metal as a main component; the selective reaction layer includes oxide represented by A | 09-26-2013 |
20130306475 | GAS SENSOR - In a gas sensor, a gas sensor element includes a solid electrolyte body that has a bottomed tubular shape and a pair of reference and measurement electrodes that are respectively provided on the inner and outer surfaces of the solid electrolyte body. A cover is arranged to cover a distal end portion of the gas sensor element. The cover has at least one through-hole that is positioned on a distal side of the distal end portion of the gas sensor element in a longitudinal direction the gas sensor. The measurement electrode is positioned, on the outer surface of the solid electrolyte body, outside of an overlapping area that overlaps with the at least one through-hole of the cover in the longitudinal direction. | 11-21-2013 |