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| Number | Title | Issue Date |
| 7413645 | Devices, systems and methods for testing gas sensors and correcting gas sensor output A method of adjusting the output of an electrochemical sensor includes the steps of: simulating the presence of an analyte gas electronically; measuring a response of the sensor to the electronic simulation; and adjusting the output of the sensor as a function of th... | 08/19/2008 |
| 7291253 | Detection of an unstable additive breakdown product in a plating bath The 3-mercaptopropylsulfonic acid (MPSA) breakdown product of the bis(sodiumsulfopropyl)disulfide (SPS) additive used in acid copper plating baths accelerates copper electrodeposition and can be detected by cyclic voltammetric stripping (CVS) analysis. In the presen... | 11/06/2007 |
| 7240546 | Method and apparatus for downhole detection of CO2 and H2S using resonators coated with CO2 and H2S sorbents A formation fluid sample is exposed to a rigidly-supported semi-permeable membrane such as silicone rubber to permit diffusion of gases and vapors from the formation fluid into a vacuum chamber, while at the same time, blocking the passage of any liquids. The membra... | 07/10/2007 |
| 7215021 | Electronic device The conductor wire surface for constituting a circuit formed by print or junction on a substrate formed from a composite member of ceramics, resin, and an inorganic member and from a resin member is coated with glass, resin, solder, or silver paste, thus the corrosi... | 05/08/2007 |
| 7060169 | Electrochemical cell for gas sensor An electrochemical cell for applications such as electrochemical fuel cells, or electrochemical cell gas sensors used for detection of target gas species in environments containing or susceptible to presence of same. The electrochemical cell utilizes an ionic liquid... | 06/13/2006 |
| 6716336 | Sensor for determining the concentration of sulphur compounds in a liquid A sensor for determining the concentration of sulphur compounds in a liquid includes: a working electrode in contact with the liquid to be analyzed; a referenced electrode insulated from the liquid to be analyzed; a liquid-impermeable membrane located between the wo... | 04/06/2004 |
| 6709568 | Method for determining concentrations of additives in acid copper electrochemical deposition baths The present invention relates to a method for determining concentration of brightener and leveler contained in an aqueous acid metal electroplating solution, by firstly determining the concentration of the brightener at a first set of measurement conditions, and sec... | 03/23/2004 |
| 6638415 | Antioxidant sensor The present invention relates to a device and method for measuring the level of an oxidant or antioxidant analyte in a fluid sample. The device comprises a disposable electrochemical cell, such as a thin layer electrochemical cell, containing a reagent ca... | 10/28/2003 |
| 6623620 | Method for detecting or monitoring sulfur dioxide with an electrochemical sensor A thick film electrochemical micro-sensor device for detecting or monitoring sulfur dioxide, comprising a substrate to which is applied a working electrode, a counter electrode, a reference electrode, and optionally a heater and a temperature detector, wh... | 09/23/2003 |
| 6572753 | Method for analysis of three organic additives in an acid copper plating bath Acid copper electroplating baths used to form ultra-fine circuitry features on semiconductor chips contain suppressor, anti-suppressor and leveler additives that must be closely controlled in order to obtain acceptable copper deposits. Cyclic voltammetric... | 06/03/2003 |
| 6527929 | Gas sensor and nitrogen oxide sensor A gas sensor for measuring an amount of a measurement gas component, including a solid electrolyte having an internal space, a gas-introducing port for introducing measurement gas from an external space into the internal space, diffusion rate-determining ... | 03/04/2003 |
| 6508924 | Control of breakdown products in electroplating baths Disclosed are methods for analyzing additive breakdown products in electroplating baths as well as methods of controlling the presence of such breakdown products in electroplating baths.... | 01/21/2003 |
| 6423209 | Acid gas measuring sensors and method of using same A electrochemical sensor for the detection of traces of HF and/or other acid gases in air, comprising a measuring electrode of an electrochemically active metal oxide powder, a reference electrode for fixing the potential of the measuring electrode close ... | 07/23/2002 |
| 6355150 | Analyzer for measuring H2S and its use for a sulfur oxidation reactor An analyzer for continuously measuring the H2 S content of a gas stream which utilizes a drying module for drying the gas, a compressor for compressing the gas, a means for diluting the compressed sample and an electrical chemical sensor. The i... | 03/12/2002 |
| 6312585 | Method for determining oxidizable constituents in a gaseous mixture A method and arrangement is described for determining oxidizable constituents in a gas mixture by using a solid electrolyte cell with at least one reference electrode and at least one working electrode made of electrically conducting mixed oxides which is... | 11/06/2001 |
| 6284112 | Gas sensor Disclosed is a gas sensor for measuring a NOx concentration comprising a main pumping cell and a detecting electrode, the main pumping cell including an electrode (an inner pumping electrode and an outer pumping electrode) having no decomposing/reducing a... | 09/04/2001 |
| 6203678 | Solid electrolyte sensor for measuring gaseous anhydrides A galvanic solid electrolyte sensor for measuring gaseous anhydrides includes a ceramic solid electrolyte that has a material that conducts electrons, a measuring electrode that includes a pure or doped alkaline or alkaline earth salt and a reference elec... | 03/20/2001 |
| 6200445 | Sulfur dioxide gas sensor A sulfur dioxide gas sensor having a high selectivity of SO2 gas, and an operability at a high temperature which comprises: a solid electrolyte having oxygen ion conductivity; a detecting electrode for measuring sulfur dioxide gas, electrically... | 03/13/2001 |
| 6179992 | Gas sensor The invention relates to a galvanic cell comprising a) an oxygen-ion-conducting solid electrolyte, b) a gas-sensitive material which contains at least one salt having the structural formula Mem (XOn)p, where Me is a metal, X st... | 01/30/2001 |
| 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 |
| 6120663 | Gas sensor Disclosed is a gas sensor comprising a main pumping cell for pumping-processing oxygen in a first chamber; an auxiliary pumping cell for pumping-processing oxygen in a second chamber; and a measuring pumping cell for pumping-processing oxygen in a measure... | 09/19/2000 |
| 6093294 | Gas sensor and gas concentration controller Disclosed are a gas sensor and a gas concentration controller each comprising a comparative amplifier for comparing a reference voltage with a terminal voltage between a reference electrode and an inner pumping electrode to obtain a difference therebetwee... | 07/25/2000 |
| 6083370 | Gas sensor Disclosed is a gas sensor comprising a main pumping cell for pumping-processing oxygen contained in a measurement gas introduced into a first chamber, an auxiliary pumping cell for pumping-processing oxygen contained in the measurement gas introduced into... | 07/04/2000 |
| 6045673 | Gas sensor Disclosed is a gas sensor comprising a first internal space for making communication with the external space via a first diffusion rate-determining section, a first electrochemical pumping cell for controlling the oxygen concentration in the atmosphere in... | 04/04/2000 |
| 6036842 | Gas sensor, method for controlling gas sensor, gas concentration controller, and method for controlling gas concentration A system is constructed such that a voltage between an inner pumping electrode and a reference electrode is measured to determine a difference between a measured voltage and a reference voltage so that a pumping voltage is controlled by using the differen... | 03/14/2000 |
| 5958214 | Electrochemical sensor with a solid electrolyte for measuring the gas concentration The invention relates to an electrochemical sensor to determine the concentration of a gas to be quantified, comprising a housing, a measuring electrode comprising a catalystically active material which causes a reaction of the gas to be quantified, a cou... | 09/28/1999 |
| 5954930 | Reference electrode for electrolytic cells having an ion-conducting solid electrolyte The invention relates to a reference electrode for electrolytic cells having an ion-conducting solid electrolyte, to sensors comprising the reference electrode of the invention and to their use of the reference electrode for analyzing gases.... | 09/21/1999 |
| 5944969 | Electrochemical sensor with a non-aqueous electrolyte system Accordingly, the present invention provides an electrochemical sensor comprising at least two electrochemically active electrodes, a non-aqueous electrolyte system and a diffusion barrier membrane through which the analyte in its gas phase is mobile but t... | 08/31/1999 |
| 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 |
| 5910239 | Potentiometric CO2 sensor having an open titanate- or stannate-based reference electrode The invention relates to a a reference electrode for electrolytic cells, comprising a combination of (a) titanium dioxide and an alkali-metal or alkaline-earth-metal titanate or (b) tin dioxide and an alkali-metal or alkaline-earth-metal stannate as a hom... | 06/08/1999 |
| 5908546 | Detection of hydrogen chloride The present invention provides an electrochemical sensor for the detection of hydrogen chloride. In general, the electrochemical sensor comprises a housing having disposed therein a working electrode, a reference electrode and a counter electrode. The ele... | 06/01/1999 |
| 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 |
| 5865973 | Electrochemical measuring cell The invention is directed to an electrochemical measuring cell to detect different gas components. The measuring cell includes several measuring electrodes (12, 15, 18) and a counter electrode 30 in an aqueous electrolyte 3. The measuring cell is improved... | 02/02/1999 |
| 5766563 | Method for controlling the oxidation of sulfites in a flue gas desulfurization process A method of controlling the oxidation of sulfites in a flue gas desulfurization process involves treating the exhaust gas with an absorbing fluid containing a calcium compound and controlling the oxidation of sulfites by regulating oxygen flow into the ab... | 06/16/1998 |
| 5741413 | Gas sensors and method of using same A method of calibrating and using a device for the determination of the concentration of an active gas in a mixture of gases wherein the device incorporates a gas sensor (4) and has gas diffusion barrier means (A) and (B), one of which may be closed by a ... | 04/21/1998 |
| 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 |
| 5656143 | Sensors for the analysis of molten metals A solid electrolyte sensor to measuring the amount of trace elements, such as sulfur, in molten metals such as steel is provided wherein zirconia toughened strontium ଲ-alumina is used as the solid electrolyte. The resulting sensor is highly resistan... | 08/12/1997 |
| 5650054 | Low cost room temperature electrochemical carbon monoxide and toxic gas sensor with humidity compensation based on protonic conductive membranes A low cost room temperature electrochemical gas sensor with humidity compensation for sensing CO, alcohol vapors and other toxic analyte gases has a solid protonic conductive membrane with a low bulk ionic resistance. A sensing electrode and a counter ele... | 07/22/1997 |
| 5626738 | Methods for the separation and detection of nitrosothiols A method for detecting a nitrosothiol in an eluant from a chromatographic process including passing the eluant through a series of electrodes comprising an upstream working electrode and a downstream working electrode. The upstream working electrode is ma... | 05/06/1997 |
