Gaseous Halogen Or Halogen Containing Compound Patents (Class 205/779.5)
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Patent number: 11408876Abstract: A monitoring system may include a module configured to couple to a base. The module may include a memory configured to store a firmware application and data, a processor operably coupled to the memory and configured to execute firmware to control the monitoring system, a wireless communication transceiver configured to allow communications between the module and other modules external to the monitoring system, and at least one sensor. The monitoring system is operable to monitor data measured via the at least one sensor and provide monitoring and alarm functions. The module is replaceable separately from the base, which has a shape generally resembling a safety cone.Type: GrantFiled: May 14, 2019Date of Patent: August 9, 2022Assignee: Industrial Scientific CorporationInventors: Timothy J. Belski, Rodney David Brenstuhl, Joshua Allen Futrell, Charles Dennis Hughes, Thomas Michael Mikulin, Henry J. Suwalski, Daniel James Timco
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Patent number: 11137368Abstract: This disclosure provides a sensor for detecting an analyte. The sensor can include an antenna and sensing material both disposed on a substrate, where the sensing is electrically coupled to the antenna. The sensing material can include a carbon structure including a multi-modal distribution of pore sizes that define a surface area including bonding sites configured to interact with one or more additives and the analyte. The carbon structure is configured to generate a resonant signal indicative of one or more characteristics of the analyte in response to an electromagnetic signal. The carbon structure can include distinctly sized interconnected channels defined by the surface area and configured to be infiltrated by the analyte, and exposed surfaces configured to adsorb the analyte. Each of the interconnected channels can include microporous pathways and/or mesoporous pathways, which can increase a responsiveness of the sensing material proportionate to the analyte within the carbon structure.Type: GrantFiled: May 29, 2020Date of Patent: October 5, 2021Assignee: LytEn, Inc.Inventors: Michael W. Stowell, Bruce Lanning, Sung H. Lim, Shreeyukta Singh, John Chmiola
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Patent number: 10900924Abstract: Embodiments of the invention are directed to a system for detecting neurotransmitters. A non-limiting example of the system includes a porous electrode. A system can also include a pH sensor attached to the porous electrode, wherein the pH sensor includes a sensing electrode and a reference electrode. The system can also include electronic circuitry in communication with the pH sensor.Type: GrantFiled: June 19, 2017Date of Patent: January 26, 2021Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Qing Cao, Hariklia Deligianni, Fei Liu
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Patent number: 10502705Abstract: A method for detecting an analyte comprises providing a first carbon-based material comprising reactive chemistry additives, providing conductive electrodes connected to the first carbon-based material, exposing the first carbon-based material to an analyte, applying a plurality of alternating currents having a range of frequencies across the conductive electrodes, and measuring the complex impedance of the first carbon-based material using the plurality of alternating currents.Type: GrantFiled: January 3, 2019Date of Patent: December 10, 2019Assignee: Lyten, Inc.Inventors: Michael W. Stowell, Bruce Lanning, Sung H. Lim, Shreeyukta Singh, John Chmiola
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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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Publication number: 20130043140Abstract: The present invention is related to a method for detecting at least one chemical analyte vapour in a gaseous environment comprising the steps of: providing a fibre-based electrochemical sensor, said fibre-based sensor comprising at least one type of composite fibres, said type of composite fibres comprising a co-continuous phase blend comprising a first and a second continuous polymer phase, the first polymer phase being sensitive to the chemical analyte vapour to be detected in use, wherein said first polymer phase comprises a dispersion of carbon nanotubes at a concentration above the percolation threshold and wherein the chemical analyte is soluble in said first polymer phase; measuring the initial electrical conductivity of the fibre-based sensor; bringing said fibre-based sensor into contact with at least one chemical analyte to induce a modification of the electrical conductivity of the fibres; measuring the modification of the resulting electrical conductivity of said fibre-based sensor and correlaType: ApplicationFiled: October 26, 2010Publication date: February 21, 2013Applicants: UNIVERSITE DE BRETAGNE SUD, NANOCYL S.A.Inventors: Frederic Luizi, Luca Mezzo, Jean-François Feller, Mickaël Castro
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Patent number: 8142641Abstract: A electrochemical sensor comprising a mounting having screen printed array of electrodes located thereon, the array comprising a reference electrode, a counter electrode and a plurality of working electrodes, wherein the working electrodes are each overlaid with an insulating layer of insulating material, the insulating layer having an array of apertures, exposing a respective array of working regions of the working electrodes, and a method of making same by applying screen printing technic, and a method of using same for chlorine determination.Type: GrantFiled: August 31, 2006Date of Patent: March 27, 2012Assignee: Palintest LimitedInventors: Stephen William Birch, John Sutherland
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Patent number: 7988844Abstract: A method for measuring an iodine adsorption number of carbon black includes: (a) electrochemically reducing an unknown amount of iodine adsorbed by a predetermined amount of a carbon black sample; (b) measuring the electrical charge used for reducing the unknown amount of the iodine adsorbed by the carbon black sample; and (c) obtaining the iodine adsorption number from the measured electrical charge. An electrolytic cell and a kit for measuring an iodine adsorption number of carbon black are also disclosed.Type: GrantFiled: August 7, 2009Date of Patent: August 2, 2011Assignee: National Kaohsiung University of Applied SciencesInventors: Jiin-Jiang Jow, Ho-Ruei Chen, Ping-Feng Lo, Zong-Sin Guo, Tzong-Rong Ling
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Patent number: 7918977Abstract: An electrochemical gas sensor, a method for making the sensor and methods for the detection of a gaseous species. The electrochemical gas sensor is a solid-state gas sensor that includes a solid polymer electrolyte. A working electrode is separated from a counter electrode by the solid polymer electrolyte. The sensor can include a multilaminate structure for improved detection properties, where electrode microbands are disposed within the solid polymer electrolyte.Type: GrantFiled: September 20, 2006Date of Patent: April 5, 2011Assignee: Synkera Technologies, Inc.Inventors: Debra J. Dorisio Deininger, Clayton J. Kostelecky
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Publication number: 20100252451Abstract: Exposure of diffusion limited sensors to target gas concentrations above their range can result in non-linearity and slow recovery times. Applications where both a high concentration and a low concentration need to be measured in succession are problematic if the high concentration gas adversely affects the response of the sensor to low gas concentrations. By employing two sensors, one for high range and one for low range gas concentrations, and a means to isolate the low range sensor from the gas source whenever the concentration exceeds a threshold value as determined by the high range sensor and reengage the low range sensor when the target gas concentration falls below the threshold, allows both the measurement of target gas to high concentrations as well as the high resolution measurement of target gas at low concentrations.Type: ApplicationFiled: March 18, 2010Publication date: October 7, 2010Inventor: P. RICHARD WARBURTON
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Publication number: 20100147705Abstract: An electrochemical sensor and method of detecting gaseous analytes are provided, which involve the use of a working electrode comprising edge plane pyrolytic graphite.Type: ApplicationFiled: December 22, 2005Publication date: June 17, 2010Applicant: ISIS INNOVATION LTD.Inventors: Richard Guy Compton, Craig Edward Banks
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Patent number: 7678253Abstract: An electrochemical sensor for corrosive gases that contains at least two electrodes is described. The presence of a target corrosive gas results in the formation of metal ions that can be reduced at an electrode producing an electrical current that depends on the instantaneous corrosive gas concentration and deposition of the metal on the electrode. Extension of this deposit to a second electrode through further deposition will result in a short circuit, the longer the time to the short circuit, the lower the cumulative corrosive gas concentration.Type: GrantFiled: August 6, 2004Date of Patent: March 16, 2010Inventors: Mehrooz Zamanzadeh, P. Richard Warburton
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Publication number: 20090189077Abstract: Disclosed herein are detectable refrigerant compositions, comprising from about 0.001 to about 5 weight percent tracer compositions, which are useful to identify leaking in a vapor compression refrigeration and/or air conditioning system. The presence of the tracers make the refrigerant compositions detectable by chemo/electro-active array, corona discharge, heated diode, electrochemical, photoionization, infrared, ultrasonic and electron capture detectors.Type: ApplicationFiled: March 30, 2009Publication date: July 30, 2009Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Donald Bernard Bivens, Thomas J. Leck, Mack McFarland, Barbara Haviland Minor, John Carl Steichen
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Publication number: 20090127134Abstract: A method of determining information about a gas sample includes: causing bulk flow of the gas sample in an airstream along at least one flow channel such that all or a significant fraction of the gas sample is consumed on at least one adjacent sensing electrode whereby one or more electrolytic currents are generated, and monitoring at least one electrolytic current so as to determine information about the gas sample.Type: ApplicationFiled: December 20, 2007Publication date: May 21, 2009Inventors: Keith Pratt, Andrew T. Yardley, Terence N. Moran
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Patent number: 7438796Abstract: A sensor for measurement of free chlorine and of total chlorine in aqueous solution including a working electrode having a self-assembled monolayer (SAM) formed on the surface thereof, producing a barrier which reduces the generation of background currents when electrical potentials are applied to the electrode, and blocks the reduction or oxidation of interfering species in the solution, is described. Such SAMs have also been found to block the efficient reduction of chlorine as well. However, N,N-diethyl-p-phenylenediamine (DPD) has been found to effectively transport electrons across the SAM; that is, an oxidized form of DPD produced by a reaction with chlorine is capable of penetrating the SAM such that the reduction of the oxidized DPD species can occur. The generated reduction current is correlated with the concentration of chlorine in solution. Total chlorine may be determined by the addition of an iodide salt.Type: GrantFiled: August 28, 2006Date of Patent: October 21, 2008Assignee: Hach CompanyInventor: Corey A. Salzer
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Patent number: 6808618Abstract: In an improved amperometric gas sensor, the structure, composition, and electrode potential are adjusted so as to prevent or minimize any unwanted reactivity at the counter and/or reference electrode of any analyte or interfering component of the matrix that may cross over thereto. The sensor is preferably structured so that the product of the analyte reaction at a first working electrode can be reconverted to the original analyte at a counter electrode or at a second working electrode and then reacted again at the first working electrode, with such back-and-forth reactions repeating many times, so as to yield an amplification of the analyte signal.Type: GrantFiled: July 25, 2001Date of Patent: October 26, 2004Inventor: Joseph Robert Stetter
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Patent number: 6740225Abstract: A thick film electrochemical microsensor device for measuring or regulating chlorine and bromine in water, comprising a substrate to which is applied an optimum arrangement of at least two electrodes. The device is especially useful for measuring or regulating chlorine and bromine levels in swimming pool or spa water. A method of measuring or regulating ions of at least one of chlorine and bromine in water is also described, which comprises contacting the water with the microsensor of the present invention; measuring the current output of the microsensor; determining the level of at least one of chlorine and bromine indicated by the current output; and generating a signal.Type: GrantFiled: March 6, 2001Date of Patent: May 25, 2004Assignee: Hathaway Brown SchoolInventors: Bonnie Gurry, Meijun Shao, Laurie Dudik, Chung-Chiun Liu
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Patent number: 6623647Abstract: This invention is directed to a method and apparatus for controlling and optimizing the feed of two or more oxidizers to an aqueous stream, thereby providing a synergistic effect. The system combines the use of amperometric or ORP based sensor technology with amperometric sensor technology employing a gas permeable membrane, thereby providing definitive control of each oxidizer feed stream.Type: GrantFiled: March 15, 2002Date of Patent: September 23, 2003Assignee: United States Filter CorporationInventor: Roy Martin
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Patent number: 6423209Abstract: 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 to the equilibrium potential of the oxidation/reduction system of MeOn/Mem+, and a counter electrode. The electrodes are in communicative contact with a hygroscopic electrolyte. The measured gas component changes the pH of the electrolyte, and thus the electrochemical equilibrium of the measuring electrode, to produce a measurable electrical current that is proportional to the concentration of the detected acid gas.Type: GrantFiled: October 13, 2000Date of Patent: July 23, 2002Assignee: Advanced Technology Materials, Inc.Inventors: Martin Weber, Christoph Braden, Serguei Tsapakh
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Patent number: 6235188Abstract: When the water stored in a reservoir 1 and containing chlorine ion and/or bromine ion is supplied to and circulated through an electrolyzer 4 and electrolyzed therein to create hypochlorous acid and/or hypobromous acid so that the water is purified and sterilized, a potential difference measuring unit is interposed between a measuring electrode dipped into the water containing the hypochlorous acid and/or hypobromous acid and a reference electrode dipped into water having a prescribed electric conductivity and containing neither hypochlorous acid nor hypobromous acid to thereby evaluate a measured potential difference as a COD value which is an index of pollution. With this arrangement, a polluted state of water can be promptly and simply evaluated as the COD value.Type: GrantFiled: May 6, 1999Date of Patent: May 22, 2001Assignee: Omega Co., Ltd.Inventors: Shinichi Nakamura, Kunihiko Fukuzuka, Katsuhiro Misawa, Akushige Okuda