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| Number | Title | Issue Date |
| 7632393 | Total organic carbon (TOC) analyzer The invention disclosed is a total organic carbon (TOC) analyzer comprised of an electrochemical cell comprising a diamond-film electrode (2) doped with boron or other conductivity including material. The diamond-film electrode is the working electrode and ca... | 12/15/2009 |
| 7237430 | Method and apparatus for enhanced detection of a specie using a gas chromatograph The invention includes a method and apparatus for a chromatography system having a chromatographic column for separating gases in a mixture from one another and an electrochemical gas sensor coupled to the chromatographic column for detecting a gas being emitted fro... | 07/03/2007 |
| 7180596 | Gas concentration detector A gas concentration detector prevents deviation in output due to a difference in oxygen reactivity between electrode materials to accurately detect a specific gas component in a gas to be measured, such as NOx in an exhaust gas. A sensor element in an NOx sensor has... | 02/20/2007 |
| 7043974 | Multiple-blower relative humidity controlled test chamber An accelerated weathering apparatus includes a test chamber (30), a specimen supporting means (34), a light source (60) powered by a power source controlled by a ballast, at least one chamber air temperature sensor (26), a black panel tem... | 05/16/2006 |
| 7043960 | Self-calibrating pressure transducer A self-calibrating pressure transducer is disclosed. The device uses an embedded zirconia membrane which pumps a determined quantity of oxygen into the device. The associated pressure can be determined, and thus, the transducer pressure readings can be calibrated. T... | 05/16/2006 |
| 7036388 | Sample heater assembly and method of use thereof A sample heater assembly which permits the detection of low volatility agents by existing chemical agent detectors is described. Existing chemical agent detectors often lack the capability to accurately detect low volatility agents, such as the chemical warfare agen... | 05/02/2006 |
| 7034704 | System powered via signal on gas pipe A system comprises a first conductor configured to receive a signal via a supply side gas pipe, a second conductor configured to receive a reference signal via a reference path, and a circuit coupled to the first conductor and the second conductor. The circuit is co... | 04/25/2006 |
| 7025870 | Method for analyzing the oxygen concentration of a gas A method for analyzing the oxygen concentration of a gas with an oxygen concentration analyzer of such a type that a probe sensor, when supplied with a gas to be analyzed, produces an electrical output which is proportional to the concentration of oxygen in the gas,... | 04/11/2006 |
| 6972083 | Electrochemical method and system for monitoring hydrogen peroxide concentration in slurries Electrochemical monitoring system and method are provided for online determination of hydrogen peroxide concentration in slurries, e.g., a chemical mechanical polishing slurry. The monitoring system includes an electrochemical cell fluidly coupled to receive a slurr... | 12/06/2005 |
| 6913928 | Hazardous chemical simulants Disclosed are hazardous chemical simulant compositions that can be used to simulate hazardous chemicals and methods for using hazardous chemical simulants. The compositions can include a phosphor, which emits visible light in the presence of ultraviolet light. The m... | 07/05/2005 |
| 6841053 | Electronic tongue as ozone detector An electronic tongue for the detection of ozone is based on voltammetry, and comprises at least one working electrode and a counter electrode, wherein the working electrode(s) is(are) made of one or more transition metals or Au, or alloys thereof, or alloys thereof ... | 01/11/2005 |
| 6797151 | CO sensor and method of measuring CO concentration A CO sensor and a CO-concentration measurement method which enables accurate measurement of CO concentration irrespective of the hydrogen concentration of a gas under measurement. By applying a first predetermined voltage between first and second electrodes 7 | 09/28/2004 |
| 6623619 | Electrochemical sensor for determining analyte in the presence of interferent and method of using the sensor Electrochemical sensor for determining analyte in the presence of interferent, particularly carbon monoxide in the presence of hydrogen. An electrochemical cell is designed so that current flow resulting from reference electrode potential shift caused by ... | 09/23/2003 |
| 5932079 | Electrochemical multigas sensor An electrochemical measuring cell for the simultaneous detection of different gas components in a gas sample, with a plurality of measuring electrodes (4, 5, 6) behind a diffusion barrier (7), with a common reference electrode (8) and counterelectrode (9)... | 08/03/1999 |
| 5910450 | Process and device for enriching gas, vapor and/or aerosol emissions released from an object A process for enriching substance emissions released from an object in the form of gases, vapors or aerosols, wherein the substance emissions are fed to an adsorption layer by diffusion or penetration and are enriched in the adsorption layer. The substanc... | 06/08/1999 |
| 5906726 | Electrochemical sensor approximating dose-response behavior and method of use thereof The present invention provides an electrochemical sensor for the detection of an analyte, wherein the output or response of the electrochemical sensor approximates the dose-response behavior of a living organism upon exposure to the analyte. The electroch... | 05/25/1999 |
| 5893968 | Method and apparatus for measuring combustible gas component by burning the component An apparatus for measuring a combustible gas component of a subject gas in an external subject gas space, including a first processing zone communicating with the subject gas space, 58), a second processing zone communicating with the first processing zon... | 04/13/1999 |
| 5876577 | Electrochemical oxygen sensor An electrochemical oxygen sensor comprises an impermeable substrate and a plurality of conductive layers applied thereto by thick film deposition. At least one conductive layer comprises an electrode and a conductor connected to the electrode. The electro... | 03/02/1999 |
| 5759368 | Electrochemical gas sensor An electrochemical gas sensor with at least two electrodes, with an electrode holder and with an electrolyte in a housing made of an electrolyte-impermeable material is improved in terms of its ease of handling and durability, without compromising the qua... | 06/02/1998 |
| 5733436 | Method for determining the state of an electrochemical gas sensor This invention relates to a process for determining the state of an electrochemical gas sensor located in an environment with a known and constant concentration of a gas which is to be detected, where said gas to be detected is converted by chemical react... | 03/31/1998 |
| 5728289 | Sensor cell holder for gas analyzer A cell block for housing a sensor cell within a gas analyzer is mounted on the front panel of the analyzer, holding the sensor within a horizontal plane. The cell block is made of inexpensive and non-permeable material such as aluminum which is brazed and... | 03/17/1998 |
| 5707444 | Method for controlling the temperature in a kiln A method and apparatus for controlling the temperature in a kiln in which cement clinker is manufactured. The temperature is controlled by controlling the fuel rate to the kiln. The fuel rate is adjusted according to a calculation that is made of the sulp... | 01/13/1998 |
| 5690808 | Electrochemical gas sensors and methods for sensing electrochemical active gases in gas mixtures An electrochemical, galvanic type, oxygen sensor including scavenging electrodes for continuously reacting any unreacted or partially reacted active gases, such as oxygen, to remove the active gases prior to being dissolved or have been dissolved in the e... | 11/25/1997 |
| 5667653 | Electrochemical sensor The present invention provides a low-cost alternative to currently available electrochemical sensors. In general, the present invention provides an electrochemical sensor for the detection of an analyte comprising a first metallic housing member and a sec... | 09/16/1997 |
| 5624546 | Method and apparatus for the detection of toxic gases A compact electrochemical cell utilized for the detection of numerous toxic gases. The cell includes working and counter electrodes, surrounded by a liquid electrolyte, all of which is enclosed behind a gas permeable, hydrophobic membrane. The working ele... | 04/29/1997 |
| 5580439 | Reference electrode for electrochemical determination of oxygen partial pressure in an ionic melt The method of electrochemical determination of oxygen partial pressure in ionic melts includes providing a metal/metal oxide reference electrode consisting of an electrode body made of a metal selected from the group consisting of Mo, W, Hf, Nb and Ta and... | 12/03/1996 |
| 5554272 | Planar bicarbonate sensor A planar bicarbonate sensor has been discovered that has a dried residue internal electrolyte layer comprising a bicarbonate source and a halide salt of potassium, lithium, or sodium. The flow-through sensor is capable of providing bicarbonate level of a ... | 09/10/1996 |
| 5552025 | Sensors A sensor for measuring sulphur dioxide in flue gases comprises a sensing electrolyte of doped ଲ-alumina or doped NASICON. The dopant serves to increase conductivity at grain boundaries in the sensing element or at the electrode interface, thereby to... | 09/03/1996 |
| 5538620 | Electrochemical sensor with which to measure gas concentrations The invention concerns a novel electrochemical sensor with which to measure gas concentrations and comprising a measuring electrode and an associated electrode containing a carbonaceous material with a specific surface of at least 40 m2 /g and ... | 07/23/1996 |
| 5474665 | Measuring sensor for determining the oxygen content of gas mixtures The invention relates to a measuring sensor having pump reference for measuring the oxygen content of gas mixtures, particularly exhaust gases of internal combustion engines. The sensor includes a measuring cell (A) and a reference cell (B) each having a ... | 12/12/1995 |
| 5417821 | Detection of fluids with metal-insulator-semiconductor sensors A MIS diode sensor having a Pd/Cu alloy electrode is sensitive to and can detect CO, H2, C2 H2 and C2 H4. An array of MIS diode sensors having varying electrode compositions can indicate a fault in an... | 05/23/1995 |
| 5405512 | Gas sensor and method A system and method of detecting the end of useful life in a gas sensor cell having a cathode, anode, one of which is consumable, and an electrolyte, and a circuit for controlling the flow of gas to the cell and a sensing resistor and circuit connected to... | 04/11/1995 |
| 5405510 | Portable analyte measuring system for multiple fluid samples A portable, ready-for-use analyte measuring device is provided for the measurement of multiple sequential fluid samples. The device has a disposable cartridge, a calibrating fluid external to the cartridge and an analyzer. The cartridge has a housing, inl... | 04/11/1995 |
| 5395494 | Dynamic microchamber for measuring formaldehyde emissions A method and apparatus for measuring the formaldehyde emission of composite wood products bonded with urea-formaldehyde adhesives employing the combination of a small sample chamber and an electrochemical sensor.... | 03/07/1995 |
| 5393392 | Polarographic PPB oxygen gas sensor A polarographic electrochemical cell for the measurement of oxygen in ppb. The cathode in the system is a non-depleting carbon polytetrafluoroethylene electrode catalytically specific for oxygen reduction. The anode is a composite nickel matrix. The react... | 02/28/1995 |
| 5316647 | Portable oxygen analyzer A hand held completely self-contained and shirt pocket size oxygen analyzer for secondary monitoring of oxygen percentage is formed of a housing that contains display and control electronics and a visible display screen. The housing is shaped to form an i... | 05/31/1994 |
| 5250169 | Apparatus for sensing hydrocarbons and carbon monoxide An apparatus and a method for sensing hydrocarbons and carbon monoxide in a measurement gas, e.g., the exhaust gas from an automobile engine. A solid state electrochemical oxygen pumping cell adds oxygen into the apparatus which contains a solid state com... | 10/05/1993 |
| 5200044 | Method for measuring oxygen content An oxygen sensor or cell for measuring the oxygen content of a specimen includes a body with a chamber that houses an electrochemically active anode and an electrochemically active cathode. A chemically inert, electrically inactive porous material is disp... | 04/06/1993 |
| 5085760 | Electrochemical gas sensors An electrochemical gas sensor having a high surface area gas diffusing electrode defined for diffusing gases to be sensed to reach the catalyst surfaces of the electrode to provide the cathodic reduction of oxygen in a gas mixture undergoing sensing there... | 02/04/1992 |
| 5085743 | Electrode for current-limited cell, cell including the electrode method for using the cell and a method of making the electrode The gas-sensing electrodes prepared according to this invention are specifically designed for cells which operate in a current-limited mode, i.e. at current densities well below 20 mA/cm2. Such cells are particularly useful to measure or detect... | 02/04/1992 |
