Selectively Permeable Membrane Patents (Class 204/415)
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Publication number: 20140190827Abstract: A gas sensor element which has water-permeable electrodes, and water-impermeable leads connected to the electrodes A first electrode (133) has a space exposure portion (133b) exposed to internal space (160) of a gas sensor element (10) which communicates with an ambient atmosphere. A first lead (137) is connected to the first electrode (133). The first electrode (133) includes a first connection portion (133d) which is disposed at a position not exposed to the internal space (160) and connected to the first lead (137), and which is a portion of the first electrode (133) located most distant from the internal space (160). The entire first connection portion (133d) is located in a region A1 which extends from the internal space (160) over a distance of 1.0 mm or less. Also enclosed is a gas sensor including the gas sensor element.Type: ApplicationFiled: January 3, 2014Publication date: July 10, 2014Applicant: NGK SPARK PLUG CO., LTD.Inventors: Kentaro KAMADA, Masaki NAKAGAWA, Koji SHIOTANI
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Publication number: 20140183062Abstract: Compositions containing vinyl polymers and ionophores selective for lead ions (e.g., polypyrrole copolymers), and methods for making these compositions are disclosed herein. The compositions can, for example, be used for detecting lead ions in a sample.Type: ApplicationFiled: March 19, 2012Publication date: July 3, 2014Applicant: TONGJI UNIVERSITYInventor: Mei-rong Huang
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Publication number: 20140183061Abstract: Compositions containing vinyl polymers and ionophores selective for lead ions (e.g., aniline copolymers), and methods for making these compositions are disclosed herein. The compositions can, for example, be used for detecting lead ions in a sample.Type: ApplicationFiled: November 25, 2011Publication date: July 3, 2014Applicant: TONGJI UNIVERSITYInventors: Mei-rong Huang, Hao Feng, Xin-gui Li
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Publication number: 20140174923Abstract: A five-part internal reference electrode, including a membrane formed in situ, which is useful in automated clinical chemistry analyzers, the method of forming a direct solid state connection to the membrane eliminating the need for the use of an internal reference electrode internal filling solution, and a ganged assembly of said internal reference electrodes with a grounding unit and an external reference electrode.Type: ApplicationFiled: December 26, 2012Publication date: June 26, 2014Inventor: K. Jagan M. Rao
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Patent number: 8758593Abstract: An electrochemical sensor and a method for using an electrochemical sensor are described where the electrochemical sensor comprises a working electrode having thereon one or more redox species that are sensitive to an analyte to be measured and a polymer coating that provides for interaction between the redox species and the analyte.Type: GrantFiled: August 6, 2010Date of Patent: June 24, 2014Assignee: Schlumberger Technology CorporationInventors: Nathan Lawrence, Valerie Lafitte
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Publication number: 20140154811Abstract: Technologies are generally described for gas filtration and detection devices. Example devices may include a graphene membrane and a sensing device. The graphene membrane may be perforated with a plurality of discrete pores having a size-selective to enable one or more molecules to pass through the pores. A sensing device may be attached to a supporting permeable substrate and coupled with the graphene membrane. A fluid mixture including two or more molecules may be exposed to the graphene membrane. Molecules having a smaller diameter than the discrete pores may be directed through the graphene pores, and may be detected by the sensing device. Molecules having a larger size than the discrete pores may be prevented from crossing the graphene membrane. The sensing device may be configured to identify a presence of a selected molecule within the mixture without interference from contaminating factors.Type: ApplicationFiled: November 30, 2012Publication date: June 5, 2014Inventors: Angele Sjong, Kraig Anderson, Gary L. Duerksen, Seth Adrian Miller
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Patent number: 8741119Abstract: An apparatus for real-time, in-situ monitoring of actinide ion concentrations which comprises a working electrode, a reference electrode, a container, a working electrolyte, a separator, a reference electrolyte, and a voltmeter. The container holds the working electrolyte. The voltmeter is electrically connected to the working electrode and the reference electrode and measures the voltage between those electrodes. The working electrode contacts the working electrolyte. The working electrolyte comprises an actinide ion of interest. The reference electrode contacts the reference electrolyte. The reference electrolyte is separated from the working electrolyte by the separator. The separator contacts both the working electrolyte and the reference electrolyte. The separator is ionically conductive to the actinide ion of interest. The reference electrolyte comprises a known concentration of the actinide ion of interest. The separator comprises a beta double prime alumina exchanged with the actinide ion of interest.Type: GrantFiled: March 3, 2011Date of Patent: June 3, 2014Assignee: U.S. Department of EnergyInventors: Jan-fong Jue, Shelly X. Li
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Publication number: 20140138245Abstract: A protector includes an inside protector having an inside peripheral wall and a front end wall in a front end side thereof and a tubular outside protector which surrounds the inside protector. In an outside peripheral wall of the outside protector, a plurality of outside introducing ports through which an external part of the outside protector communicates with a gas separating chamber are formed at equal intervals along a circumferential direction. The outside introducing ports are formed at positions nearer to the front end side than positions where inside introducing ports of the inside protector are formed. The outside introducing ports extend in the circumferential direction of the outside peripheral wall and formed in shapes of lateral holes in which opening lengths in the circumferential direction are larger than opening lengths in the direction perpendicular to the circumferential direction.Type: ApplicationFiled: November 8, 2013Publication date: May 22, 2014Applicant: NGK SPARK PLUG CO., LTD.Inventors: Tomoki FUJII, Takaya YOSHIKAWA
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Publication number: 20140116880Abstract: A cathodic material for use in an electrochemical sensor comprising: a carbonaceous material and an oxygen reduction catalyst associated with the carbonaceous material; and wherein the cathodic material does not materially exhibit catalytic activity for the oxidation of carbon monoxide. Associated electrochemical sensors may include an anode and cathode that are disposed upon the same or opposite sides of an ion exchange membrane and/or exposed to the same or different gaseous environments.Type: ApplicationFiled: January 6, 2014Publication date: May 1, 2014Applicant: Gentex CorporationInventor: Joel C. Nemes
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Patent number: 8707892Abstract: An apparatus for single-sided bilayer formation includes a first fluid chamber including a sidewall and a second fluid chamber extending through the sidewall. A barrier wall separates the first and second fluid chambers and includes a nanopore therein across which a planar lipid bilayer (PLB) is formed. In use, an electrolyte is added to the first and second fluid chambers and a lipid/organic solvent mixture is added to the first fluid chamber to form a lipid/organic solvent layer. The electrolyte level within the first fluid chamber is adjusted such that the lipid layer is raised above the barrier wall and a PLB is formed. Electrolyte levels may be adjusted manually or utilizing a fluid level regulator with or without feedback control. Optionally, the apparatus may be in the form of a nanopore array. The apparatus may be incorporated into an ion channel sensing system.Type: GrantFiled: January 13, 2012Date of Patent: April 29, 2014Assignee: Electronic Biosciences, Inc.Inventors: Eric N Ervin, Geoffrey Alden Barrall
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Publication number: 20140110274Abstract: A method of producing porous ionic conducting material, comprising the step of positioning an ionic substance into cellulosic material to form a continuous web or at least one individual sheet of porous ionic cellulosic based material, comprising the steps of first producing a web or sheet shaped cellulosic based substrate and thereafter applying liquid comprising room temperature ionic liquids. The porous ionic conducting material is used in flexible electronic device, by using the material as a substrate and applying a conducting material. A sensor assembly for sensing a property of an object, comprising at least one sensor wherein said sensor assembly comprises a flexible web or sheet shaped material. An authentication device for verifying the authenticity of an object. The device comprising at least one flexible electronic device.Type: ApplicationFiled: May 14, 2012Publication date: April 24, 2014Inventors: Magnus Lestelius, Elson Montibon, Lars Järnström
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Patent number: 8702935Abstract: An electrochemical gas sensor includes a housing, a first working electrode within the housing and having a first section of gas transfer medium and a first layer of catalyst on the first section of gas transfer medium, and at least a second working electrode within the housing and having a second section of gas transfer medium and a second layer of catalyst on the second section of gas transfer medium. At least one of the first section of gas transfer medium and the second section of gas transfer medium includes at least one area in which the structure thereof has been irreversibly altered to limit diffusion of gas through the at least one of the first section of gas transfer medium or the second section of gas transfer medium toward the other of the at least one of the first section of gas transfer medium and the second section of gas transfer medium.Type: GrantFiled: October 28, 2010Date of Patent: April 22, 2014Assignee: Mine Safety Appliances CompanyInventors: Brian Keith Davis, Towner Bennett Scheffler, Michael Alvin Brown
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Publication number: 20140102897Abstract: Disclosed herein are embodiments of an apparatus for analysis of electrochemical dissolution. One embodiment comprises a working electrode submerged in a first reaction chamber containing liquid electrolyte, a counter electrode submerged in a second reaction chamber containing liquid electrolyte, a reference electrode submerged in a third reaction chamber and electrolytically connected to the working electrode and an ion conductor electrolytically connecting the first reaction chamber and the second reaction chamber while physically separating the first reaction chamber and the second reaction chamber.Type: ApplicationFiled: October 12, 2012Publication date: April 17, 2014Applicant: NISSAN NORTH AMERICA, INC.Inventors: Gregory Jerkiewicz, Kevork Adjemian, Diane Beauchemin, Liyan Xing, Mohammad Hossain
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Publication number: 20140090977Abstract: An electrochemical sensor cell is disclosed. The cell comprised of a diffusion membrane, a cathode, an anode, an electrolyte, electronic circuit board with electronic leads contained in housing. The anode is made of substantially pure bismuth. The electrolyte may be either solid or aqueous solution of potassium hydroxide (KOH) solution or acetic acid (CH3COOH). The cathode may be a carbon fiber substrate with gold deposited thereon. The sensor may be RoHS compliant.Type: ApplicationFiled: September 28, 2012Publication date: April 3, 2014Inventor: Alan Boardman
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Publication number: 20140083852Abstract: A sensor body of an electrochemical gas sensor having no water reservoir is housed in a metal can including a sensing electrode on one surface of a proton-conducting membrane or a separator retaining an electrolyte and a counter electrode on the opposite surface thereof. The counter electrode is supported by and electrically connected to the metal can via a connecting member. The sensing electrode is connected to a diffusion control plate with the sensing electrode-side ring member, and the ring member is conductive and includes a hole at a center thereof that is connected to a hole of the diffusion control plate.Type: ApplicationFiled: February 11, 2013Publication date: March 27, 2014Applicant: FIGARO ENGINEERING INC.Inventors: Yoshihiro YAMAMOTO, Masafumi OKADA, Kuniyuki IZAWA, Tomoyasu HONDA
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Patent number: 8673386Abstract: Disclosed herein is a composition for glucose sensing obtained by dispersing in a solvent such as acetone a nanofibrous membrane fabricated by electrospinning a mixture containing poly(vinylidene fluoride) and poly(aminophenylboronic acid). Also disclosed is a method of fabricating a non-enzymatic glucose biosensor based on an electrospun nanofibrous membrane by depositing the composition on an electrode.Type: GrantFiled: October 24, 2008Date of Patent: March 18, 2014Assignee: Kyungpook National University Industry Academic Cooperation FoundationInventors: Kwang Pill Lee, Iyengar Gopalan Anantha, Sundaram Komathi Shanmuga
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Publication number: 20140065515Abstract: An electrochemical device having a liquid electrolyte which includes a protic solvent, an anode electrode disposed in contact with the liquid electrolyte, and a cathode electrode disposed in contact with the liquid electrolyte. A membrane which interrupts the transport of ions between the electrodes at a predetermined temperature is disposed in the liquid electrolyte between the anode electrode and the cathode electrode. In this way, electrochemical devices such as batteries, fuel cells, electrolyzers, and sensors, which may overheat during use and cause a fire or explosion, are precluded from overheating.Type: ApplicationFiled: November 7, 2013Publication date: March 6, 2014Applicant: Gas Technology InstituteInventor: Qinbai FAN
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Publication number: 20140034515Abstract: A reference electrode with an in-situ modified porous diaphragm has at least one housing (1, 201, 301), a first conductor element (4, 204, 304), a modifying electrolyte which is capable of free-flow movement and is contained in the housing (1, 201, 301), and a porous diaphragm (3, 203, 303) which establishes a liquid connection between the modifying electrolyte and a measurement medium (9, 209, 309). The modifying electrolyte seeps out through the porous diaphragm during operation. The modifying electrolyte has a first component and a surface-modifying component which modifies the surface of the porous diaphragm (3, 203, 303) in situ during the passage of the modifying electrolyte. A method for modifying the porous diaphragm in situ is presented.Type: ApplicationFiled: December 15, 2011Publication date: February 6, 2014Applicant: METTLER-TOLEDO AGInventor: Rolf Thrier
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Patent number: 8632665Abstract: The invention relates to an electrochemical sensor including a housing with a chamber containing an electrolyte, at least one measuring electrode for oxygen detection, at least one counter electrode and at least one reference electrode, wherein the sensor has a two-part diffusion barrier, wherein a first part of the barrier forms a labyrinth with a second part of the barrier disposed between the measuring and the counter electrode.Type: GrantFiled: May 7, 2009Date of Patent: January 21, 2014Assignee: MSA Auer GmbHInventors: Rolf Eckhardt, Martin Weber
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Publication number: 20140014512Abstract: Provided are an amperometric sensor and device for electrochemically quantifying nitrosothiol (RSNO), which is associated with storage and delivery of nitric oxide (NO) in the human body. The amperometric sensor for measuring a concentration of RSNO includes an electrode configured to measure an electric current generated by an oxidation reaction of NO, and a means configured to start and stop photo-induced decomposition of RSNO. Here, the electric current is measured by the oxidation reaction of NO before and after the photo-induced decomposition of RSNO. The amperometric sensor may measure separate signals of RSNO and NO, which are present in the sample at the same time, using one electrode, thereby preventing an inhibition action caused by NO during the measurement of RSNO. Also, the amperometric sensor is simple in structure and easy to manufacture and may be applied to manufacture of a small electrode, and thus may be developed as a sensor for in vivo measurements.Type: ApplicationFiled: April 14, 2011Publication date: January 16, 2014Applicant: I-SENS, INC.Inventors: Sung A Hong, Da Yeon Sung, Jun Hee Han, Jea Hun Song, Hakhyun Nam, Geun Sig Cha, Jae Ho Shin
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Publication number: 20140008220Abstract: The presently disclosed subject matter relates to a microfluidic device for measuring an amount of a molecular species in a sample. The device comprises a body and an electrode assembly, the electrode assembly comprising at least one electrode coupled to the body. The device also includes a gas permeable membrane disposed on at least one electrode and a detector for measuring a current at each of the electrodes. Further, the device comprises a channel defined between a substantially planar substrate and planar cover glass. The presently disclosed subject matter also relates to methods of making the microfluidic device.Type: ApplicationFiled: March 14, 2012Publication date: January 9, 2014Applicant: UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILLInventors: Mark Schoenfisch, Benjamin Privett, John Ramsey, William Henley
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Publication number: 20140008221Abstract: The presently disclosed subject matter relates to sensors for measuring an amount of a gaseous species in a sample. The sensors comprise a gas permeable polysiloxane network membrane, comprising both alkyl and fluorinated alkyl groups. In some embodiments, the polysiloxane network can be formed from the co-condensation of a mixture of an alkylalkoxysilane and a fluorosilane. The presently disclosed subject matter also relates to methods of making the sensors, methods of selectively measuring an amount of a gaseous species, such as nitric oxide, in a sample, and to compositions comprising the polysiloxane networks.Type: ApplicationFiled: September 9, 2013Publication date: January 9, 2014Inventors: Mark H. Schoenfisch, Jae Ho Shin
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Patent number: 8613843Abstract: An electro-chemical sensor for methane is described having a catalyst to react methane or other low molecular weight hydrocarbons and a detector to detect the turnover or reaction rate and using such information to determine the concentration of the methane or other low molecular weight species. The sensor is preferably used for measurements in a wellbore.Type: GrantFiled: June 3, 2005Date of Patent: December 24, 2013Assignee: Schlumberger Technology CorporationInventors: Timothy Gareth John Jones, Li Jiang
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Publication number: 20130334063Abstract: This disclosure relates to a method of detecting an analyte. The method includes (1) contacting an aqueous solution containing the analyte with an electrochemical detector having a working electrode, a counter electrode, and a solid electrolyte, where the analyte includes a halogen or an oxy-halogen species and the solid electrolyte provides an electrical pathway between the working and counter electrodes; (2) applying a voltage to the detector; and (3) measuring the resultant current change in the detector.Type: ApplicationFiled: March 12, 2013Publication date: December 19, 2013Applicant: Gordon & Rosenblatt, LLCInventors: Aaron A. Rosenblatt, Gilbert Gordon, Gilbert Pacey
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Publication number: 20130334052Abstract: An apparatus for continuous simultaneous electroplating of two metals having substantially different standard electrodeposition potentials (e.g., for deposition of Sn—Ag alloys) comprises an anode chamber for containing an anolyte comprising ions of a first, less noble metal, (e.g., tin), but not of a second, more noble, metal (e.g., silver) and an active anode; a cathode chamber for containing catholyte including ions of a first metal (e.g., tin), ions of a second, more noble, metal (e.g., silver), and the substrate; a separation structure positioned between the anode chamber and the cathode chamber, where the separation structure substantially prevents transfer of more noble metal from catholyte to the anolyte; and fluidic features and an associated controller coupled to the apparatus and configured to perform continuous electroplating, while maintaining substantially constant concentrations of plating bath components for extended periods of use.Type: ApplicationFiled: May 24, 2013Publication date: December 19, 2013Inventors: Lee Peng Chua, Steven T. Mayer, David W. Porter, Thomas A. Ponnuswamy
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Publication number: 20130313111Abstract: A water-concentration detection device is configured to detect a water concentration of insulating gas filled in a gas-insulated device. The water-concentration detection device includes: a gas chamber in which the insulating gas introduced from the gas-insulated device is enclosed; electrodes that are porous and are arranged to face each other within the gas chamber; a solid electrolyte membrane that is hydrogen-ion conductive and is held between and fixedly attached to the electrodes; an impedance measurement unit that measures an alternating-current impedance between the electrodes by applying an alternating-current voltage to the electrodes; a water-concentration detection unit that detects the water concentration of the insulating gas based on the alternating-current impedance measured by the impedance measurement unit; and a drying unit that removes water from an atmosphere in the gas chamber before the insulating gas is introduced into the gas chamber from the gas-insulated device.Type: ApplicationFiled: April 2, 2012Publication date: November 28, 2013Applicant: Mitsubishi Electric CorporationInventors: Chieko Nishida, Tatsuya Yabe
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Patent number: 8568582Abstract: Systems and methods for selectively removing hydrogen gas from a hydrogen-containing fluid volume are disclosed. An exemplary system includes a proton exchange membrane (PEM) selectively permeable to hydrogen by exclusively conducting hydrogen ions. The system also includes metal deposited as layers onto opposite sides or faces of the PEM to form a membrane-electrode assembly (MEA), each layer functioning as an electrode so that the MEA functions as an electrochemical cell in which the ionic conductors are hydrogen ions, and the MEA functioning as a hydrogen selective membrane (HSM) when located at the boundary between a hydrogen-containing fluid volume and a second fluid.Type: GrantFiled: March 31, 2010Date of Patent: October 29, 2013Assignee: Alliance for Sustainable Energy, LLCInventor: Gregory C. Glatzmaier
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Publication number: 20130277217Abstract: A thin film/MEMS electrochemical gas sensor includes a body having first and second joined subassemblies to form an interior portion of the body, and is composed of a semiconductor material. The body includes at least one opening configured to allow air to pass into the interior portion of the body. A membrane stack is located in the interior of the body, producing an electrical signal that represents a concentration of target gas in the air at the membrane stack. Conductive contacts are configured to provide electrical connection to the membrane stack to access the electrical signal produced by the membrane stack.Type: ApplicationFiled: December 14, 2010Publication date: October 24, 2013Applicant: UTC Fire & Secruity CorporationInventors: Anis Zribi, Ken Mott
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Publication number: 20130270125Abstract: A potentiometric sensor apparatus, comprising: a measuring half-cell having a measuring membrane; a reference half-cell; and a measurement circuit for registering a potential difference between the measuring half-cell and the reference half-cell. The measuring membrane has, covering at least one portion of the measuring membrane during dry storage of the sensor apparatus, a coating, which is embodied, upon immersion of at least one immersion region of the sensor apparatus (which region comprises the measuring membrane and is intended for immersion in a measured medium) in a liquid, especially a water containing liquid, in the case of continued contact with the liquid, to dissolve, at least partially, off of the measuring membrane.Type: ApplicationFiled: April 12, 2013Publication date: October 17, 2013Applicant: Endress + Hauser Conducta Gesellschaft fur Mess- und Regeltechnik mbH + Co. KGInventor: Endress + Hauser Conducta Gesellschaft fur Mess- und Regeltechnik mbH + Co. KG
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Patent number: 8551322Abstract: The presently disclosed subject matter relates to sensors for measuring an amount of a gaseous species in a sample. The sensors comprise a gas permeable polysiloxane network membrane, comprising both alkyl and fluorinated alkyl groups. In some embodiments, the polysiloxane network can be formed from the co-condensation of a mixture of an alkylalkoxysilane and a fluorosilane. The presently disclosed subject matter also relates to methods of making the sensors, methods of selectively measuring an amount of a gaseous species, such as nitric oxide, in a sample, and to compositions comprising the polysiloxane networks.Type: GrantFiled: August 24, 2007Date of Patent: October 8, 2013Inventors: Mark H. Schoenfisch, Jae Ho Shin
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Patent number: 8535499Abstract: Micromachined reference electrodes for use in miniaturized electrochemical sensors, and methods for fabricating such reference electrodes and electrochemical sensors, for example, as a part of a microfluidic system, are disclosed. Electrochemical measurements allow for inexpensive detection of a wide variety of (bio-)chemical compounds in solution. The reference electrode is one of the main parts of an electrochemical cell. The reference electrode, from which no current is drawn, has a stable, constant potential.Type: GrantFiled: February 9, 2011Date of Patent: September 17, 2013Assignee: Stichting IMEC NederlandInventors: Michiel Blauw, Javier Gonzalo Ruiz, Mercedes Crego Calama, Sywert H. Brongersma
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Publication number: 20130233728Abstract: An amperometric electrochemical sensor configured to be operable in an oxidizing atmosphere and under an applied bias to exhibit enhanced reduction of oxygen molecules at the sensing electrode in the presence of one or more target gas species and a resulting measurable increase in oxygen ion flux through the cell. The sensor has an electrolyte membrane, a sensing electrode on the electrolyte membrane, and a counter electrode on the electrolyte membrane, wherein the sensing electrode includes at least one molybdate or tungstate compound. An electrochemical sensor system is also provided, along with a method of detecting the concentration of one or more of NOx and NH3 in a gas sample or stream.Type: ApplicationFiled: March 8, 2013Publication date: September 12, 2013Inventors: Michael J. Day, Scott L. Schwartz, Lora B. Thrun, Buddy E. McCormick
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Patent number: 8518237Abstract: The service life of amperometric electrochemical oxygen sensors is increased by operating the electrodes of such sensors at a polarization voltage suitable for measuring the oxygen content of samples only during calibration or when measuring such samples and thereafter modulating the polarization voltage to a lower voltage such that substantially no electrical current is produced by the electrodes.Type: GrantFiled: September 14, 2009Date of Patent: August 27, 2013Assignee: Siemens Healthcare Diagnostics Inc.Inventors: Andy Chan, Lawrence Milesky
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Patent number: 8506779Abstract: Described herein are substrates, sensors and systems related to measuring the concentration of an analyte such as hydrogen ion in a sample. Redox active moieties whose reduction and/or oxidation potentials are sensitive to the presence of an analyte are immobilized onto a surface of an electrode. Immobilized redox active moieties whose reduction and/or oxidation potential are insensitive to the analyte can be used for reference. Voltammetric measurements made using such modified surfaces can accurately determine the presence and/or concentrations of analytes in a sample of interest. The electrochemical sensors of the invention are robust and can be made so as not to require calibration or recalibration.Type: GrantFiled: September 22, 2011Date of Patent: August 13, 2013Assignee: Sensor Innovations, Inc.Inventors: Carolyn R. Kahn, Elicia Wong, Vern Norviel
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Patent number: 8496795Abstract: An electrochemical gas sensor with a plurality of electrodes is provided with an electrolyte, with a gas-permeable membrane (1), with a gas-permeable and conductive carrier layer (2) applied to the membrane (1) and with at least one measuring electrode (3) applied to the carrier layer (2). The measuring electrode (3) is of a punctiform design and the electrochemical potential difference of the reaction between the carrier layer (2) and the measuring electrode (3) is at least 20 mV, can be manufactured in a compact form and makes possible an especially low power consumption for measured gases in the percentage range.Type: GrantFiled: August 22, 2007Date of Patent: July 30, 2013Assignee: Dräger Safety AG & Co. KGaAInventor: Uwe Kühn
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Publication number: 20130175168Abstract: An electrochemical carbon monoxide sensor that is optionally tankless and/or reservoir free for use in a gas/fire detector having a housing for containing a micro electrode assembly therein, and a micro electrode assembly which includes an anode, a cathode and an ion conducting membrane, wherein the ion conducting membrane permits ion transport between the anode and the cathode, and wherein the ion conducting membrane prevents electron conduction between the anode and the cathode, and further wherein the ion conducting membrane comprises at least one of an acid doped polybenzimidazole, an acid doped polypyridylbenzimidazole, a protic ionic liquid doped polybenzimidazole, a protic ionic liquid doped sulfonated polyimide, and combinations thereof.Type: ApplicationFiled: February 28, 2013Publication date: July 11, 2013Applicant: GENTEX CORPORATIONInventor: Gentex Corporation
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Patent number: 8479562Abstract: The aim of the present invention is to identify stationary and moveable high explosives and chemical warfare on-field with a unique structure of a portable neutrons generator used in strategic and public places, vehicles and airplanes. The present invention includes also a unique operation of fusion fuel below breakdown which is characterized with high production efficiency. The analysis of identifying the elements and their concentrations is also introduced in the present invention.Type: GrantFiled: February 14, 2011Date of Patent: July 9, 2013Inventors: Yasser Ragab Shaban, Milen K. Panteleev
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Publication number: 20130168245Abstract: A water analysis sensor electrode for determining an analyte in water includes a sensor electrode housing which is configured to be closed. The sensor electrode housing comprises an inner wall and an ion-selective sensor electrode diaphragm arranged at a lower distal end of the sensor electrode housing. An electrolyte solution is in the sensor electrode housing. A measuring electrode is arranged in the sensor electrode housing. A gas bubble is enclosed by the sensor electrode housing. A rigid rod element having a round cross section is arranged in the sensor electrode housing so that a continuous open capillary channel extends over a length of the sensor electrode housing between the rigid rod element and the inner wall.Type: ApplicationFiled: July 13, 2011Publication date: July 4, 2013Applicant: HACH LANGE GMBHInventors: Axel Leyer, Lothar Heidemanns, Andreas Jonak, Markus Hahn, Michael Kussmann, Andreas Golitz, Aurelia Stellmach-Hanulok, Claudia Rieger, Heinz Rudde
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Publication number: 20130161191Abstract: A reference half-cell for application in an electrochemical sensor, comprising a housing, in which a chamber containing a reference electrolyte is formed, wherein the reference electrolyte (5, 105) is in contact with a medium surrounding the housing via a liquid junction arranged in a wall of the housing, wherein the liquid junction comprises a porous diaphragm, especially a porous ceramic diaphragm, and wherein the diaphragm has, at least partially, a coating, which comprises at least one metal.Type: ApplicationFiled: December 19, 2012Publication date: June 27, 2013Applicant: Endress + Hauser Conducta Gesellschaft fur Mess- und Regeltechnik mbH + Co. KGInventor: Endress + Hauser Conducta Gesellschaft fur Mess- und Regeltechnik mbH + Co. KG
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Patent number: 8454819Abstract: The present invention includes sensors and systems that include a sensor. A sensor includes a sensor polymer, where the polymer includes a repeating unit having an anilineboronic acid-phosphate complex or an anilineboronic acid complexed with an alcohol or diol. The sensor polymer may be a copolymer, such as a random copolymer, a block copolymer, or an alternate copolymer. The present invention also provides methods for using the sensors described herein, including methods for detecting the presence of an analyte, such as CO2, in a fluid.Type: GrantFiled: September 1, 2010Date of Patent: June 4, 2013Assignee: University of ManitobaInventors: Sureshraja Neethirajan, Michael S. Freund, Digvir J. Jayas
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Patent number: 8425672Abstract: A membrane selectively permeable to light gases comprises a membrane body formed by a first plate and a second plate. The second plate comprises a thin layer that is selectively gas-permeable. In the region of windows, this layer is exposed. There, support is provided by a porous bottom wall in the first plate or by narrow bores in the second plate. A heating device causes a radiation heating of the windows.Type: GrantFiled: August 10, 2012Date of Patent: April 23, 2013Assignee: Inficon GmbHInventors: Vladimir Schwartz, Daniel Wetzig, Boris Chernobrod, Werner Grosse Bley
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Patent number: 8414751Abstract: A gas sensor (100) in a sensor housing (1) has a gas-permeable membrane (7) for the inlet of a gas sample to be analyzed to a measuring electrode (6). The gas sensor (100) is provided with a test gas generator (18), which has a generator housing (8). The generator housing (8) is fastened in the area of the gas-permeable membrane (7) and has a central gas outlet opening (21) for the gas sample to pass into the sensor and has outlet openings (19) directed towards the gas-permeable membrane (7) for the test gas.Type: GrantFiled: September 23, 2010Date of Patent: April 9, 2013Assignee: Dräger Safety AG & Co. KGaAInventors: Andreas Nauber, Michael Sick, Julia Danckert, Peter Tschuncky
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Publication number: 20130068632Abstract: A DNA/RNA detection technology is provided. The open flow detection technique includes a substrate defining a pair of opposing microchannels, a pair of opposing electrodes in the opposing microchannels, and at least one ion exchanging nanomembrane coupled between the opposing microchannels such that the opposing microchannels are connected to each other only through the nanomembrane, wherein the nanomembrane is functionalized with a probe complementary to the macromolecule.Type: ApplicationFiled: May 21, 2012Publication date: March 21, 2013Applicant: UNIVERSITY OF NOTRE DAME DU LACInventors: Hsueh-Chia Chang, Zdenek Slouka, Satyajyoti Senapati, Li-Jing Cheng
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Publication number: 20130068615Abstract: A membrane, especially for application in a sensor, which membrane includes a biocidal effect. The membrane comprises one or more components of the group consisting of: silver nano particles encapsulated in amphiphilic, core, shell structures, antimicrobial silanes, polymers with an antimicrobial end group, polyquads with modified end groups, and biocidally acting block copolymers. The membrane is resistant against aggressive agents, for example, corrosive or oxidizing cleaning agents, in the case of sterilizing, in the case of autoclaving, in the case of thermal loading and/or in the case of mechanical loading.Type: ApplicationFiled: September 12, 2012Publication date: March 21, 2013Applicants: Technische Universität Dortmund, Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KGInventors: Thomas Endl, Jörg Tiller, Thilo Trapp
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Publication number: 20130062222Abstract: An electrochemical sensor measuring concentration of an analyte in a test fluid at 50° C. or above by voltammetry uses electrodes in contact with an electrolyte containing the analyte and a redox-active species electrochemically convertible between reduced and oxidised forms. At least one form of the redox active species is present within surfactant micelles. The surfactant micelles enhance thermal stability of the redox active species and may also solubilise a species with poor water solubility, such as t-butylferrocene. A downhole tool incorporating such a sensor comprises a barrier, permeable to the analyte, to separate the electrolyte from subterranean reservoir fluid, so that the sensor directly measures analyte which has passed through the barrier and thereby indirectly measures analyte in the test fluid.Type: ApplicationFiled: August 13, 2012Publication date: March 14, 2013Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Valerie LAFITTE, Gary John TUSTIN
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Publication number: 20130062223Abstract: A gas sensor having first and second electrodes, an ion conducting solid electrolyte membrane positioned therebetween, first and second electrically conductive gas diffusion layers, first and second electrode contact members for electrically coupling said first and second electrodes to an external circuit, a water reservoir, a gas entry passageway and a water permeation barrier for controlling the transport of water vapor to the ion conducting solid electrolyte membrane. The water permeation barrier is a thin walled member which allows water vapor to diffuse therethrough and evaporate from an exit surface, the thickness of the water permeation barrier controlling the internal relative humidity of the sensor. A method for adjusting the present sensor in-situ due to changes in the current humidity conditions of the sensor so as to keep the gas sensitivity loss within a predetermined range is also disclosed.Type: ApplicationFiled: September 7, 2012Publication date: March 14, 2013Inventor: Michael David Rabbett
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Patent number: 8382974Abstract: A sodium sensor to measure a concentration of sodium methylate in methanol. The sensor assembly includes a solid alkali ion conducting membrane, a reference electrode, and a measurement electrode. The solid alkali ion conducting membrane transports ions between two alkali-containing solutions, including an aqueous solution and a non-aqueous solution. The reference electrode is at least partially within an alkali halide solution of a known alkali concentration on a first side of the solid alkali ion conducting membrane. The measurement electrode is on a second side of the solid alkali ion conducting membrane. The measurement electrode exhibits a measurable electrical characteristic corresponding to a measured alkali concentration within the non-aqueous solution, to which the measurement electrode is exposed.Type: GrantFiled: February 16, 2010Date of Patent: February 26, 2013Assignee: Ceramatec, Inc.Inventors: Sai Bhavaraju, Shekar Balagopal, Justin Pendelton, Peter Wall
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Publication number: 20130043129Abstract: The present disclosure relates to a gas sensor including a nanopore electrode and a fluorine compound coated on the nanopore electrode, and also relates to a preparing method of the gas sensor.Type: ApplicationFiled: August 16, 2012Publication date: February 21, 2013Applicant: EWHA UNIVERSITY-INDUSTRY COLLABORATION FOUNDATIONInventors: Youngmi LEE, Myung Hwa KIM, Min-Cheol OH, Hyunkyung DO, Kyung JANG, Ji-Hyang JANG
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Publication number: 20130032479Abstract: A measuring transducer embodied to produce and output a measurement signal dependent on an activity of a target ion present in a measured medium, wherein the measuring transducer has, in a region provided for contact with the measured medium, at least one membrane conducting the target ion; wherein the measuring transducer has a first potential sensing element and a second potential sensing element, and wherein at least one section of the second potential sensing element is arranged in the interior of the membrane and the first potential sensing element is arranged in an inner electrolyte, which is separated from the measured medium by the membrane and is in contact with the membrane.Type: ApplicationFiled: August 3, 2012Publication date: February 7, 2013Applicant: Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KGInventors: Michael Hanko, Thomas Wilhelm, Stefan Wilke
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Patent number: 8361308Abstract: A method for the detection of carbon dioxide gas using an electrochemical sensor. The method includes exposing a gas to a sensor, which includes a non-conductive solid substrate and at least one each of a metal oxide sensing electrode, a reference electrode and a counter electrode positioned on the substrate. A solid polymer electrolyte anion-exchange membrane is in intimate contact with the sensing electrode, reference electrode and counter electrode. The method is highly sensitive and selective to carbon dioxide with a very rapid response time.Type: GrantFiled: September 9, 2010Date of Patent: January 29, 2013Assignee: Giner, Inc.Inventors: Mourad Manoukian, Anthony B. Laconti, Linda A. Tempelman, John Forchione