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1. 发明申请

US20180080900A1 WATER IMMERSIBLE DETECTOR 审中-公开
公开(公告)号：US20180080900A1
公开(公告)日：2018-03-22
申请号：US15564508
申请日：2016-03-24
申请人： ION SCIENCE LIMITED
发明人： MARK STOCKDALE , WILLIAM DEAN
IPC分类号： G01N27/66 , G01N33/18
CPC分类号： G01N27/66 , G01N33/1826 , G01N2291/0253
摘要： An apparatus for detecting the presence of gaseous analytes in water includes a submersible housing enclosing a water proof sensing chamber having a first wall made of a material transparent to UV light and a second wall formed by a gas permeable membrane for admitting into the sensing chamber gas dissolved in water in which the housing is immersed during operation, a first and a second spaced sensing electrodes disposed within the sensing chamber, and a circuit connected to the sensing electrodes for measuring a current flowing through the sensing electrodes on account of ionisation of a gas in the sensing chamber by UV light. A third electrode is positioned in the sensing chamber, and the circuit is operative to apply a voltage across the third electrode and the first sensing electrode, the voltage being of sufficient magnitude to reduce condensation within the sensing chamber by hydrolysing any droplet of condensation in electrical contact with the first and third electrodes.

2. 发明授权

US09784713B2 Discharge ionization current detector 有权
公开(公告)号：US09784713B2
公开(公告)日：2017-10-10
申请号：US13714070
申请日：2012-12-13
申请人： SHIMADZU CORPORATION
发明人： Kei Shinada , Shigeyoshi Horiike
IPC分类号： G01N27/70 , G01N27/60 , G01N30/64 , G01N27/66
CPC分类号： G01N27/70 , G01N27/60 , G01N27/66 , G01N30/64
摘要： Provided is a discharge ionization current detector that is highly durable and yet can be produced at a low cost. An electrode structure 19 consisting of a dielectric-coated metal tube 16, with an insulator-coated metal wire 18 included therein, is inserted from above into a first gas passage including a dielectric tube 10. The metal tube 16 is connected to the ground on the upstream side of the first gas passage. One end of the metal wire 18 is extracted from the upstream side of the first gas passage to the outside and connected to a bias power source 33. An area which is not covered with the insulator is provided at the other end of the wire 18. This area is arranged in a second gas passage, which extends from the downstream end of the first gas passage. A metal electrode consisting of a flanged metal tube 28 is placed in the second gas passage and connected to an ion current detecting circuit 34. In the present configuration, the second gas passage, which should be heated to high temperatures, has fewer portions at which metallic parts are in contact with insulating members. This is advantageous for improving the durability of the device and reducing the used amount of expensive, highly heat-resistant sealing members and/or insulating members.

3. 发明申请

US20170269049A1 PHOTOIONIZATION DETECTOR SYSTEM FOR ORGANICS IN WATER 审中-公开
公开(公告)号：US20170269049A1
公开(公告)日：2017-09-21
申请号：US15532070
申请日：2015-11-27
申请人： Ion Science Limited
发明人： William Francis Dean , Andrew Witty
IPC分类号： G01N33/18 , G01N27/66
CPC分类号： G01N33/1826 , G01N27/66
摘要： A gas-equilibrated, volatile-in-water detector comprises a gas-sensing chamber having an orifice closed by a hydrophobic, vapour-porous membrane, typically PTFE, sealed to the periphery of the orifice. Membrane is also sealed to an external wall of a surrounding enclosure and forms an entry point to a second gaseous enclosure external of the gas-sensing chamber. A PID or similar sensor generates a measurable current or voltage in response to the partial pressure of the analyte within the gas-sensing chamber without the sensor significantly altering such equilibrium partial pressure.

4. 发明申请

US20170173648A1 DUCTLESS FUME HOOD GAS MONITORING AND DETECTION SYSTEM 审中-公开
公开(公告)号：US20170173648A1
公开(公告)日：2017-06-22
申请号：US15450852
申请日：2017-03-06
申请人： Gregory J. Dobbyn
发明人： Gregory J. Dobbyn
IPC分类号： B08B15/02 , B01D46/00 , B01L1/00 , B01D53/30 , B01D46/46 , G01N33/00 , B01D53/04
CPC分类号： B08B15/023 , B01D46/0036 , B01D46/0086 , B01D46/46 , B01D53/04 , B01D53/30 , B01D2253/102 , B01D2253/106 , B01D2257/60 , B01D2257/90 , B01D2257/93 , B01D2258/06 , B01D2259/4508 , B01L1/00 , B01L2200/141 , B01L2200/143 , B01L2300/023 , B01L2300/0681 , F24F11/0001 , F24F11/39 , F24F2003/1621 , G01N27/66 , G01N33/0004 , G01N33/0036
摘要： A ductless fume hood suitable for the removal of various chemical materials including toxic and non-toxic gases, vapors, particles, dust and unpleasant odors from a fluid stream. The ductless fume hood uses electronic devices and software to enable real time monitoring of gas levels in parts per million.

5. 发明申请

US20170153195A1 METHOD AND DEVICE FOR DETECTING CHARGED PARTICLES 审中-公开
公开(公告)号：US20170153195A1
公开(公告)日：2017-06-01
申请号：US15359623
申请日：2016-11-23
申请人： Academia Sinica
发明人： Yi-Sheng WANG
IPC分类号： G01N27/02
CPC分类号： G01N27/025 , G01N27/66 , G01N2001/028 , H01J37/244 , H01J2237/2449 , H01J2237/24507
摘要： Disclosed herein is a device for the detection of charged particles of a sample material. The device includes at least, a charge stripping means disposed in a first electric field, and a detection electrode disposed in a second electric field. The charge stripping means may neutralize or strip the charges of ions generated from the sample material and thereby give rise to detectable signals. The signals, which correspond to the stripping events occurred at the charge stripping means, are detected by the detection electrode placed in a second electric field. Disclosed herein is also a method of detecting charged particles of a sample material using the device disclosed herein.

6. 发明授权

US09651531B2 Air sampling system providing compound discrimination via comparative PID approach 有权
公开(公告)号：US09651531B2
公开(公告)日：2017-05-16
申请号：US13930017
申请日：2013-06-28
申请人： Aircuity, Inc.
发明人： Eric M. Desrochers
IPC分类号： G01N33/00 , F24F11/00 , G01N27/66 , G01N1/22
CPC分类号： G01N33/0054 , F24F11/30 , F24F2110/50 , F24F2110/66 , G01N1/2226 , G01N27/66 , Y02A50/246 , Y02A50/249 , Y02B30/78
摘要： Methods and apparatus for providing an air sampling system with first and second PID sensors to discriminate ammonia measurements. In one embodiment, air samples are taken from a vivarium environment to determine ammonia levels for controlling air flow to the vivarium.

7. 发明授权

US09459235B2 Interference compensated photoionization detector 有权
标题翻译：干涉补偿光电离检测器
公开(公告)号：US09459235B2
公开(公告)日：2016-10-04
申请号：US14046801
申请日：2013-10-04
申请人： RAE Systems, Inc.
发明人： Prabhu Soundarrajan , Peter C. Hsi
IPC分类号： G01N27/62 , G01N27/66
CPC分类号： G01N27/66
摘要： An integrated sensor of volatile organic gas can include a photoionization detector (PID) and one or more additional detectors such as an infrared detector, a catalytic combustion detector, or an electrochemical detector. One embodiment includes a methane detector that allows correction of the PID measurements for the interference of methane with the PID and/or allows a combination of measurements of the sensors to measure a total hydrocarbon concentration. A further sensor of non-hydrocarbon quenching gases such as carbon dioxide may also be used in correction of the PID measurements.
摘要翻译：挥发性有机气体的集成传感器可以包括光电离检测器（PID）和一个或多个附加检测器，例如红外检测器，催化燃烧检测器或电化学检测器。一个实施例包括甲烷检测器，其允许校正甲烷与PID的干扰的PID测量和/或允许传感器的测量的组合来测量总烃浓度。非碳氢化合物淬火气体如二氧化碳的另一传感器也可用于校正PID测量。

8. 发明申请

US20160098909A1 Differential Current Measurements To Determine Ion Current In The Presence Of Leakage Current 有权
标题翻译：差分电流测量以确定泄漏电流的离子电流
公开(公告)号：US20160098909A1
公开(公告)日：2016-04-07
申请号：US14967930
申请日：2015-12-14
申请人： Microchip Technology Incorporated
发明人： Joseph Julicher , Keith Curtis , Paul N. Katz
IPC分类号： G08B17/113
CPC分类号： G08B17/11 , G01N27/66 , G08B17/113
摘要： An ion chamber provides a current representative of its characteristics as affected by external conditions, e.g., clean air or smoke. A direct current (DC) voltage is applied to the ion chamber at a first polarity and the resulting current through the ion chamber and parasitic leakage current is measured at the first polarity, then the DC voltage is applied to the ion chamber at a second polarity opposite the first polarity, and the resulting current through the ion chamber and parasitic leakage current is measured at the second polarity. Since substantially no current flows through the ion chamber at the second polarity, the common mode parasitic leakage current contribution may be removed from the total current measurement by subtracting the current measured at the second polarity from the current measured at the first polarity, resulting in just the current through the ion chamber.
摘要翻译：离子室提供代表其受外部条件（例如清洁空气或烟雾）影响的其特性的电流。直流（DC）电压以第一极性施加到离子室，并且通过离子室产生的电流和寄生漏电流以第一极性被测量，然后将直流电压以第二极性施加到离子室与第一极性相反，并且在第二极性处测量通过离子室的所得电流和寄生漏电流。由于基本上没有电流以第二极性流过离子室，所以可以从总电流测量中去除从第一极性测得的电流以第二极性测量的电流来消除共模寄生漏电流贡献，从而产生正好电流通过离子室。

9. 发明授权

US09285344B2 Discharge ionization current detector and gas chromatograph 有权
标题翻译：放电电离电流检测器和气相色谱仪
公开(公告)号：US09285344B2
公开(公告)日：2016-03-15
申请号：US13846874
申请日：2013-03-18
申请人： SHIMADZU CORPORATION
发明人： Shinji Uchiyama , Yasunori Terai
IPC分类号： G01N27/62 , G01N27/66 , G01N30/64
CPC分类号： G01N27/66 , G01N30/64
摘要： To provide a discharge ionization current detector 3, where a partition 13a in which a through hole for penetrating a tubule 24 for introducing a sample gas is created is provided between a collector electrode 20 and an outlet for discharging a gas 26 so that a gas for generating plasma that has been generated by electrodes for discharge 15, 16 and 17 passes through a gap between the through hole and the tubule 24 so as to be directed towards the outlet for discharging a gas, and thus, the air that has entered from the other side 25 of the partition cannot pass through the through hole in the opposite direction.
摘要翻译：为了提供一种放电电离电流检测器3，其中在集电极20和用于排出气体26的出口之间设置有用于穿透用于引入样气的小管24的通孔的分隔件13a，产生的放电用电极15,16,17的等离子体通过贯通孔与小管24之间的间隙而导向排出气体的出口，因此，从隔板的另一侧25不能沿相反方向穿过通孔。

10. 发明授权

US09207209B2 Method and apparatus for detecting smoke in an ion chamber 有权
标题翻译：用于在离子室中检测烟雾的方法和装置
公开(公告)号：US09207209B2
公开(公告)日：2015-12-08
申请号：US13667165
申请日：2012-11-02
申请人： Microchip Technology Incorporated
发明人： Benjamin T. Cooke , Joseph Julicher , Keith Edwin Curtis
IPC分类号： G01N27/66 , G08B17/11 , H03M3/00 , G08B29/18
CPC分类号： G01N27/66 , G08B17/11 , G08B29/181 , H03M3/30
摘要： A smoke detection sensor ion chamber has a leakage current that is dependent upon the permittivity of the ionized gas (air) in the chamber. Smoke from typical fires is mainly composed of unburned carbon that has diffused in the surrounding air and rises with the heat of the fire. The permittivity of the carbon particles is about 10 to 15 times the permittivity of clean air. The addition of the carbon particles into the air in the ion chamber changes the permittivity thereof that is large enough to detect by measuring a change in the leakage current of the ion chamber.
摘要翻译：烟雾检测传感器离子室具有取决于室中的电离气体（空气）的介电常数的泄漏电流。典型火灾中的烟雾主要由在周围空气中扩散并随火的升高而升高的未燃碳组成。碳颗粒的介电常数为清洁空气介电常数的约10至15倍。将离子室中的碳颗粒添加到空气中通过测量离子室的泄漏电流的变化来改变其介电常数，其大到足以检测。

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