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| Number | Title | Issue Date |
| 7374942 | Process and apparatus for the combinatorial production and testing of catalyst material libraries by using at least two analytical methods A process and apparatus for testing material libraries, in particular catalysts, by means of coupled use of at least two analytical methods, preferably IR thermography and mass spectrometry. Owing to the selected arrangement, the disadvantages of the two previously ... | 05/20/2008 |
| 7329389 | Sensor device and method for qualitative and quantitative analysis of gas phase substances New sensors and methods for qualitative and quantitative analysis of multiple gaseous substances simultaneously with both high selectivity and high sensitivity are provided. The new sensors rely on a characteristic difference in energy between the interaction of a p... | 02/12/2008 |
| 7223607 | Process and device for the detection of hydrocarbons in a gas The invention relates to a process for the detection of hydrocarbons other than methane in a gas predominantly or essentially comprising oxygen, as well as methane and the said hydrocarbons other than methane, the said process comprising: ... | 05/29/2007 |
| 7211222 | Gas sensor A powder filler is stuffed in a filler space defined between a housing and a gas sensing element so as to airtightly seal a clearance between the housing and the gas sensing element. The powder filler contains grains whose diameter is in a range from 80 μm to 5,000... | 05/01/2007 |
| 7060652 | Gas sensor A liquid electrode mixture for use in a gas sensor having from about 60 to about 240 milligrams of platinum black catalyst; from about 900 to about 1100 milligrams of water; from about 300 to about 400 microliters of 1-propanol; and from about 100 microliters to abo... | 06/13/2006 |
| 7018845 | Method for staged oxidation for enhanced nitrogen and sulfur detection A more efficient method for combustion or oxidation of samples containing nitrogen, phosphorus and/or sulfur to their corresponding oxides is disclosed, where method uses multi-staged addition of an oxidizing agent to enhance oxidation and liberation of nitrogen, ph... | 03/28/2006 |
| 6495105 | Apparatus for evaluating catalyst performance Apparatus 1 for evaluating catalyst performance according to the invention comprises a reaction vessel 2 in which a plurality of catalysts S are disposed at a distance, supply pipes 3 for supplying a reactant gas into the reaction vessel 2, a plurality of... | 12/17/2002 |
| 6482650 | Method for detecting deterioration of catalyst One of a pair of temperature sensor sections in a combustible gas sensor is covered with porous oxidizing catalytic layers (23, 24) for oxidizing a combustible gas, and the other is not covered with the oxidizing catalyst layers. The temperature sensor se... | 11/19/2002 |
| 6419880 | Systems and methods for catalyst reactivation The invention includes systems and methods which allow reactivation of supported noble metal catalysts. The method involves heating the catalyst in the presence of a gaseous hydrocarbon in the absence of oxidizing agents. Systems of the invention provide ... | 07/16/2002 |
| 6319375 | Apparatus for identifying a gas An apparatus for identifying an unknown reactive gas in a carrier gas, utilizing a sensor with a diffusion limited inlet. The apparatus includes a manifold of predetermined volume having an inlet and outlet, an inlet valve in the manifold inlet, an outlet... | 11/20/2001 |
| 6214208 | Method and apparatus for measuring NOx gas concentration This is a method and apparatus for accurately determining a NOx concentration of a measurement gas that contains H2 O and/or CO2, without being affected by a dissociation of H2 O and/or CO2. In this method and a... | 04/10/2001 |
| 6187597 | Device for the expansion of sensor selectivity Electronic odor detecting device (electronic nose) provided with a number of sensors. The gas that is to be subjected to the detection is brought to pass a number of similar or different sensors distributed on a surface. Between the sensors or actually ex... | 02/13/2001 |
| 6165347 | Method of identifying a gas A method and apparatus for identifying an unknown reactive gas in a carrier gas, utilizing a sensor with a diffusion limited inlet. After a signal is established for the carrier gas, a flow of the mixture of carrier gas and reactive gas is passed to the s... | 12/26/2000 |
| 6133042 | Modulated oxygen-flux method and apparatus to improve the performance of a calorimetric gas sensor A method and apparatus is provided for modulating the flux of oxygen impinging on a calorimetric gas sensor. The method and apparatus are based on modulating the oxygen concentration of a gas mixture presented to the microcalorimeter between a predetermin... | 10/17/2000 |
| 5965451 | Use of a gas sensor for the selective detection of hydrocarbons in low-oxygen gases The invention provides a gas sensor for selective detection of hydrocarbons in low-oxygen gases, having a capacitive element and a gas-permeable sensitive layer as a dielectric. The sensitive layer is a precious-metal-doped zeolite which has a regular cry... | 10/12/1999 |
| 5922287 | Combustible gas sensor and method for detecting deterioration of catalyst A combustible gas sensor having a pair of temperature sensor sections is here disclosed. One of the pair of temperature sensor sections is covered with porous oxidizing catalytic layers (23, 24) for oxidizing a combustible gas, and the other is not covere... | 07/13/1999 |
| 5863803 | Method and apparatus for modulating a gas sample for a calorimetric gas sensor A method and apparatus is provided for modulating flux of combustibles reacting with oxygen impinging on a calorimetric gas sensor. The method includes the steps of enclosing a sensing element and a reference element of a calorimetric gas sensor with an a... | 01/26/1999 |
| 5858739 | Gas sensor A method for determining the presence of a first gas in a second gas uses a gas sensor made up of at least two pairs of electrodes, each pair of electrodes having different spacing between the electrodes. The electrodes of the gas sensor have surfaces tha... | 01/12/1999 |
| 5854079 | Method for detection of performance reduction of exhaust gas purification catalyst A method for detection of the performance reduction of an exhaust gas purification catalyst used for reducing the concentration(s) of combustible components or (and) nitrogen oxides all present in an exhaust gas, which method detects a reduction in the he... | 12/29/1998 |
| 5800783 | NOx sensor for exhaust gas and method for producing same An NOx sensor for an exhaust gas is made from ଲ-Nb2 O5 as a primary component and TiO2 as a subsidiary component. The TiO2 content is in a range of 0.1% by weight ࣘTiO2 ࣘ 20% by weight. In p... | 09/01/1998 |
| 5759862 | Measuring heating value using catalytic combustion The heating value of a sample gas is calculated by a microcontroller from the heating value of a reference gas, and from flow ratios determined as the gas is consumed by catalytic combustion. The combustible gas is mixed with a combustion supporting gas, ... | 06/02/1998 |
| 5736104 | Transition metal oxide based calorimetric non-methane hydrocarbon sensor and method A transition metal oxide based calorimetric non-methane hydrocarbon sensor (100) is constructed by disposing a transition metal based catalyst (105), preferably chromium oxide (Cr2 O3), onto a carrier (101). A temperature measurement... | 04/07/1998 |
| 5567623 | Method and system for sampling and determining the presence of compounds A system and method are provided for minimizing the effects of background signals in masking signals indicating the presence of substances to be detected such as contaminants in materials moving rapidly along a conveyor. The contaminants detected may incl... | 10/22/1996 |
| 5561068 | Method and system for sampling and determining the presence of compounds A system and method for minimizing the effects of background signals in masking signals indicating the presence of substances to be detected such as contaminants in materials moving rapidly along a conveyor. The contaminants detected may include nitrogen ... | 10/01/1996 |
| 5521101 | Monitoring bioelectrochemical reactions and novel media for bioelectrochemical reactions A method of determining an analyte in the gaseous or vapour phase and in which a bioreceptor or biomimic is retained at an electrode. The bioreceptor or biomimic is preferably retained at a support at the electrode which comprises a solid or gel matrix of... | 05/28/1996 |
| 5401470 | Combustible gas sensor A matched catalytically inactive compensator for use in a combustible gas sensor is made from a catalytically active detector. The catalytically active detector is exposed to a gas phase catalytic inhibitor such as hexamethyldisiloxane to completely destr... | 03/28/1995 |
| 5296196 | Semiconductor hydrocarbon sensor A semiconductor-type hydrocarbon sensor includes an oxide semiconductor, an outer electrode formed on an outside surface of the oxide semiconductor, an inner electrode formed on an inside surface of the oxide semiconductor, and a zeolite layer constructed... | 03/22/1994 |
| 5134080 | Fluid component detection method A selected component of a fluid mixture, for example a reduced sulfur compound vapor in air, is detected by selectively adsorbing the component onto a conductive thin layer of material having a chemical affinity for such component and observing the result... | 07/28/1992 |
| 5087574 | Fluid component detection method with feedback A selected component of a fluid mixture, for example a reduced sulfur compound vapor in air, is detected by selectively adsorbing the component onto a conductive thin layer of material having a chemical affinity for such component and observing the result... | 02/11/1992 |
| 5082789 | Bismuth molybdate gas sensor A bismuth molybdate gas sensor which provides stable sensitivity to gases such as alcohol, ketones, alkenes, and long chain alkanes is disclosed. Sensors comprising a mixture of the Bi2 Mo3 O12 and Bi2 MoO6... | 01/21/1992 |
| 5061447 | Catalytic combustion type CO gas sensor A catalytic combustion type CO gas sensor which is composed of an electrical circuit by serially arranging two coils composing an active section and a compensating section, and by providing serial bridge resistances, r1 and r2, oppos... | 10/29/1991 |
| 4957705 | Oxygen gas concentration-detecting apparatus An oxygen gas concentration-detecting apparatus in an internal combustion engine using an alcohol fuel includes a ceramic substrate having one surface falling in contact with a reference gas and the other surface falling in contact with an exhaust gas of ... | 09/18/1990 |
| 4868127 | Instrument for measurement of the organic carbon content of water Apparatus and methods for measurement of total organic carbon content of water, particularly of low relative organic content, are described, featuring a single sample cell for exposure of a static sample to ultraviolet radiation and comprising electrodes ... | 09/19/1989 |
| 4861557 | Combustible gas detector through use of reaction control block Apparatus for detecting a combustible gas which comprises a Wheatstone bridge circuit having a detector element comprising an electrically conducting member coated with a refractory and having on the surface of said refractory a catalyst for the oxidation... | 08/29/1989 |
| 4857275 | Thick-film gas-sensitive element A laminar gas-sensitive thick film consisting of ceramic semiconductor and metallic catalyzer is formed across a pair of electrodes carried by a ceramic substrate, and the nature of metallic catalyzer on an outer surface layer of the thick film is differe... | 08/15/1989 |
| 4840913 | Oxides of nitrogen detector A structure and method for sensing oxides of nitrogen in a gas. The gas is first passed through an oxidation catalyst and any reducing species in the gas are oxidized. The output gas from the oxidation catalyst is received by a sensor which generates an o... | 06/20/1989 |
| 4806314 | Organic fluid detection system and apparatus An organic fluid detection instrument having great sensitivity to low concentrations or organic fluids in a fluid stream comprise a conduit adapted for the one-way flow therethrough a mixture of an oxygen-containing carrier fluid and organic fluids; a fir... | 02/21/1989 |
| 4710353 | Corrosive liquid leak detecting sensor A detector for detecting leaks of a corrosive liquid such as strong acids or bases is provided comprising a light guide core having a covering which generates heat upon contact with the liquid to the detected, thereby changing the light transmissivity of ... | 12/01/1987 |
| 4572900 | Organic semiconductor vapor sensing method A method and apparatus to automatically compensate for temperature variation in a vapor detection system. In one embodiment, two identical organic semiconductor film sensors in close thermal contact with each other are used in the feedback circuit of an i... | 02/25/1986 |
| 4551425 | Pyroelectric gas sensor A pyroelectric substrate is provided with a heater and at least one set of electrodes for sensing charge redistributions due to changes in the substrate temperature. In a preferred embodiment, there are two interdigitated electrodes, one coated with an ab... | 11/05/1985 |
