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| Number | Title | Issue Date |
| 7575931 | Method and apparatus for reducing a nitrogen oxide, and control thereof Disclosed herein is a method and apparatus for reducing a nitrogen oxide, and the control thereof. ... | 08/18/2009 |
| 7442555 | Ammonia gas sensor method and device A mixed potential sensor device and methods for measuring total ammonia (NH3) concentration in a gas is provided. The gas is first partitioned into two streams directed into two sensing chambers. Each gas stream is conditioned by a specific catalyst syste... | 10/28/2008 |
| 7323343 | Nitrogen monoxide, nitrogen dioxide and ozone determination in air An analytical system is provided for determining nitrogen monoxide, nitrogen dioxide and ozone concentrations in air samples. An ultraviolet light source 4 is used to alter the equilibrium between nitrogen dioxide and oxygen on the one hand and nitrogen monox... | 01/29/2008 |
| 7297549 | Method of determining measurement bias in an emissions monitoring system A method of determining bias in a measurement of a constituent concentration level in a sample gas is provided. The method comprises establishing a sample gas flow from an emission stream into a sample gas line of an emissions monitoring system. The method further c... | 11/20/2007 |
| 7243527 | Sensing apparatus for a vehicle The sensing apparatus for a vehicle includes a case having an opening part formed so as to communicate with an outside. A printed circuit board is disposed inside of the case, and includes a circuit unit. A noxious gas sensing part is electrically connected with the... | 07/17/2007 |
| 7112447 | Hand held gas analyzer A lightweight and portable analyzer is provided. At least one component of the analyzer is made from a lightweight material, such as ABS. A manifold can have a plate and gas passages ultrasonically welded together. By having at least one component made from a lightw... | 09/26/2006 |
| 7067319 | System for diagnosing reagent solution quality and emissions catalyst degradation A system for determining a reagent solution quality indicator includes a reagent solution source for supplying the reagent solution to an emissions catalyst configured to receive a NOx-containing gas therethrough, means for determining a flow rate of NOx reduced fro... | 06/27/2006 |
| 7045359 | Method and apparatus to detect a gas by measuring ozone depletion The present invention relates to an apparatus and method for determining the concentration of nitric oxide (NO) in a gas mixture such as air. The gas sample containing NO is mixed with a gas containing ozone (O3), and the change in the ozone concentration... | 05/16/2006 |
| 7036982 | Method and apparatus to control an exhaust gas sensor to a predetermined termperature The invention provides a control strategy and a control system to control a gas sensor to a target operating temperature. It relies upon both feedback and model-based feedforward control systems to achieve and then maintain the sensor at the target operating tempera... | 05/02/2006 |
| 7029920 | Method and system for monitoring combustion source emissions A method and system for determining a concentration level of NOx in an exhaust stream from a combustion source. The method comprises capturing sample gas from the exhaust stream using a sampling device. NO2 in the sample gas is converted to NO ... | 04/18/2006 |
| 6933151 | Diagnostic system for monitoring catalyst performance A diagnostic system for monitoring catalyst performance in an exhaust system comprises a plurality of treatment devices catalytically treating an exhaust gas stream, and a plurality of gas sensors for monitoring the catalyst performance of the treatment devices to d... | 08/23/2005 |
| 6878339 | NOx-concentration measuring apparatus The present invention provides a NOx-concentration measuring apparatus D for quantitatively analyzing the concentration of NOx contained in a sample gas. The measuring apparatus D comprises a sampling probe for obtaining the sample gas, a drain separator 2 fo... | 04/12/2005 |
| 6867047 | Method and apparatus for preventing nitrogen interference in pyro-electrochemical methods Methods and apparatus are described for preventing nitrogen interference in the detection of a substance. In particular, it relates to new methods and apparatus for preventing interference due to nitrogen in pyro-electrochemical methods for measuring substances, for... | 03/15/2005 |
| 6861262 | Composition and method for detecting an adulterant in an aqueous sample It is discovered that a composition comprising at least one amine and at least one stabilizer may be useful in detecting the presence of an adulterant in a urine sample. Such adulterant includes an oxidizing agent. ... | 03/01/2005 |
| 6803236 | Diagnostic system for monitoring catalyst performance A diagnostic system for monitoring catalyst performance in an exhaust system comprises a plurality of treatment devices catalytically treating an exhaust gas stream, and a plurality of gas sensors for monitoring the catalyst performance of the treatment devices to d... | 10/12/2004 |
| 6780378 | Method for measuring concentrations of gases and vapors using controlled flames A method and apparatus for measuring the concentration of at least one gaseous component and/or vaporous component of a gaseous mixture in which a controlled sensor flame is introduced into the gaseous mixture and at least one narrow spectral band in the controlled ... | 08/24/2004 |
| 6635415 | Nitric oxide gas detector The concentration of nitric oxide in a gas is determined by oxidizing NO to NO2 and then measuring the concentration of NO2 in the gas, which is proportional to the concentration of NO. Preferably, gaseous NO2 molecules di... | 10/21/2003 |
| 6623699 | Analyzing system for high accuracy nitrogen determination An analyzer compensates for gas flow perturbations by providing a makeup flow of carrier gas to maintain the pressure and/or flow rate of analyte and inert gas through a detector constant such that a accurate determination of a low concentration of an ana... | 09/23/2003 |
| 6624058 | Semiconductor device and method for producing the same There is provided a semiconductor device in which substantially no deformation of a bonded wire occurs, and a method for producing the semiconductor device. A wiring pattern of a wiring substrate and an electrode of an IC chip are connected by a wire. A c... | 09/23/2003 |
| 6362005 | Nitrogen dioxide gas sensing method, nitrogen dioxide gas sensor element, and nitrogen dioxide gas sensor using the same In this invention, a mixture of a diazotizing reagent which reacts with nitrous ions to produce a diazo compound, a coupling reagent which couples with a diazo compound to produce an azo dye, and an acid is placed in pores of a transparent porous body to ... | 03/26/2002 |
| 6306609 | Methods for the detection of nitric oxide in fluid media In accordance with the present invention, there are provided articles for use in non-invasive measurements of nitric oxide levels in a variety of fluid media, e.g., in mammalian body fluids. Articles according to the present invention comprise a nitric ox... | 10/23/2001 |
| 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 |
| 6126902 | NOx sensor A stable sensor designed to detect accurately the total NOx concentration under 100 ppm in terms of the NO gas concentration is made up of a first cell and a second cell with a gas diffusion aperture provided between the two cells. The first cell has a pa... | 10/03/2000 |
| 6100096 | Nitric oxide detector A detector for detecting and measuring nitric oxide. Gas-permeable capillary membrane fibers transport a reagent solution through a plenum containing gases to be measured. Nitric oxide molecules penetrate the walls of the fibers and undergo a chemilumines... | 08/08/2000 |
| 6062064 | Apparatus for sensing low concentration NOx An apparatus for sensing low concentration NOx in the atmosphere is disclosed. The apparatus has sensor elements arranged in a flow path of the atmosphere, the resistance of each of said sensor elements varying in response to changes in NOx concentration ... | 05/16/2000 |
| 6037183 | Automotive hydrocarbon sensor system A system for measuring the non-methane HC concentration of gas sample, e.g. automotive exhaust gas, comprising first and second catalytic differential calorimetric sensors. The first catalytic differential calorimetric sensor is capable of producing a fir... | 03/14/2000 |
| 5976889 | Gas analyzer and method for detecting NOx A method and apparatus for detecting NOx by chemiluminescence. The apparatus includes a sample gas line having an inlet port for receiving a sample gas, a NOx converter connected to the sample gas line, a N2 diluting gas l... | 11/02/1999 |
| 5976888 | Method for measuring NOx in biochemical processes A method for measuring NOx in biochemical processes which includes a) isolating a liquid sample; b) adjusting the pH or ionic strength of the sample; c) recording mV values present in the sample after predetermined time periods; d) determining ... | 11/02/1999 |
| 5942190 | Oxide sensor Disclosed is an oxide sensor in which a measuring electrode is arranged at a distance d to satisfy -3tࣘdࣘ3t for a downstream end of an inner pumping electrode for a first chamber, i.e., the end located on a side of a second diffusion rate-determining ... | 08/24/1999 |
| 5906946 | Device and process for detecting and discriminating NO and NO2 from other nitrocompounds in real-time and in situ The excitation of the target nitrocompound with ultraviolet radiation ress in photodissociation yielding vibrationally excited NO with significant population of the v"=1 and v"=2 levels of the ground electronic state. As the population distribution of am... | 05/25/1999 |
| 5891735 | Method for measuring nitric oxide in nitrosyl (FeII)-hemoglobin and S-nitrosohemoglobin Nitrosyl (FeII) hemoglobin can be detected in biological samples, using a method which involves injections of samples into a photolysis cell, prior to detection of chemiluminescence generated by the reaction between nitric oxide and ozone. This method is ... | 04/06/1999 |
| 5885842 | Methods for the detection of nitric oxide in fluid media Non-invasive methods have been developed for the measurement of NO levels in a variety of fluid media, e.g., body fluids. The present invention embraces the use of a semi-permeable vessel wherein said vessel contains an NO reacting substance to trap NO di... | 03/23/1999 |
| 5866075 | Device useful for sensing ammonia and nitrogen oxides(s) gases at room temperature A device for sensing ammonia (NH3) and nitrogen oxide (NOx) gases comprising: a sensor for detecting said ammonia and said nitrogen oxide gases, said sensor including a substrate and a layer consisting of cuprate material for detecti... | 02/02/1999 |
| 5863503 | Nitrogen oxide detecting sensor and method of manufacturing the same A nitrogen oxide detecting sensor, according to the present invention, incorporates a gas detecting portion including, as a main component thereof, an oxide compound having electric conductivity or semiconductivity, the oxide compound having a crystal str... | 01/26/1999 |
| 5810984 | Nitrogen oxide sensor and method of manufacturing the sensor A nitrogen oxide sensor and a method of manufacturing the sensor are disclosed. The sensor has a gas detecting portion including sensitive material having electric property thereof subject to change in association with presence of nitrogen oxide in gas an... | 09/22/1998 |
| 5759859 | Sensor and method for detecting trace underground energetic materials A subsurface soil contaminant identification system employs a cone penetrometer unit for continuously measuring the concentration of energetic materials in potentially contaminated soils. The sensor is rugged, reliable, and has a fast response time. The i... | 06/02/1998 |
| 5739038 | Spectrometer gas analyzer system A gas analyzer system for providing a spectroscopic analysis of the sample gas. This analysis is accomplished by first introducing the sample gas into the inlet of the system and transporting it to a spectral analyzer. The sample gas is then spectrally an... | 04/14/1998 |
| 5633170 | Method and apparatus for nitrogen oxide analysis A method and apparatus for the chemiluminescent determination of NO/NOx in a sample gas is disclosed in which the NOx portion of the gas stream is catalytically converted in a preconditioned vitreous carbon bed at a relatively low te... | 05/27/1997 |
| 5536473 | Polyaniline gas sensor A gas sensor for use in monitoring gases such as H2 S, NO2 or SO2 comprises a film or layer of non-protonated polyaniline as the gas sensing material.... | 07/16/1996 |
| 5395589 | Apparatus for rapid and specific detection of organic vapors Apparatus for preconcentrating trace amounts of organic vapors in a sample of air for subsequent detection, comprising a metallic substrate; a thin film of fullerenes deposited on the metallic substrate for adsorbing the organic vapors on the thin film of... | 03/07/1995 |
