Electrochemical gas sensor for detecting hydrogen cyanide gas

A sensor, hydrogen cyanide technology, applied in the direction of material electrochemical variables, scientific instruments, instruments, etc., can solve problems such as low trigger alarm threshold level, false alarm of target gas sensor, sensor cross-sensitivity, etc.

Active Publication Date: 2019-03-15
HONEYWELL INT INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thus, the presence of interferent gases can cause cross-sensitivity in the sensor, leading to the illusion that the target gas is present at a higher level than is actually present in the ambient gas
Due to the danger posed by the presence of various target gases, the threshold level for triggering an alarm can be relatively low, and the cross-sensitivity due to the presence of interferents can be high enough to cause false alarms from the target gas sensor

Method used

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  • Electrochemical gas sensor for detecting hydrogen cyanide gas
  • Electrochemical gas sensor for detecting hydrogen cyanide gas
  • Electrochemical gas sensor for detecting hydrogen cyanide gas

Examples

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Embodiment Construction

[0016] It should be understood at the outset that while an exemplary implementation of one or more embodiments is presented below, the disclosed systems and methods may be implemented using any number of technologies, whether currently known or not . The present disclosure should in no way be limited to the exemplary implementations, drawings, and techniques shown below, but can be modified within the scope of the appended claims and their full scope of equivalents.

[0017] The following short term definitions shall apply throughout the application file:

[0018] The term "comprising" means including but not limited to and should be construed in the manner normally used in the patent context;

[0019] The phrases "in one embodiment," "according to an embodiment," etc. generally mean that the particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of the invention, and can be included in the scope of the invention. In ...

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Abstract

An electrochemical hydrogen cyanide sensor (1) comprises a housing (10) comprising an opening (2) allowing gas to enter the sensor (1); an electrolyte disposed within the housing (10); a plurality ofelectrodes in contact with the electrolyte within the housing (10), wherein the plurality of electrodes comprise a working electrode (5) and a counter electrode (7), and wherein the electrodes comprise a metal catalytic material; and a filter (3) operable to cover the opening (2) of the housing (10), and prevent hydrogen sulfide from reaching the electrodes, wherein the filter (3) comprises silversulfate layered onto a polytetrafluoroethylene support material.

Description

[0001] Cross References to Related Applications [0002] Not applicable. [0003] Statement Regarding Federally Sponsored Research or Development [0004] Not applicable. [0005] Reference to Microfiche Addendum [0006] Not applicable. Background technique [0007] Hydrogen cyanide (HCN) is used or produced in many industrial applications. The gas is so toxic that even relatively small amounts can be fatal to humans. Against such a background, there is a growing demand for HCN gas sensors for safety monitoring. The HCN gas sensor is operable to detect the presence of HCN gas and issue an alarm based on the detection. The HCN gas sensor may be carried by the user, and / or may be placed in a possible location where there is a HCN gas leak. [0008] In monitoring the presence of various gases, there may be other gases that may also react within the sensor, such as carbon monoxide (CO) or hydrogen sulfide (H2S). For example, the working electrode may contain a catalyst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
CPCG01N33/0059G01N27/4045G01N27/304G01N27/4072G01N27/4074G01N27/4075G01N27/4078
Inventor 魏娜于玉忠刘玲
Owner HONEYWELL INT INC
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