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Improved electrochemical sensor and method for detecting formaldehyde by regulating voltage to reduce cross-sensitivity

A sensor and sensitivity technology, applied in the field of improved electrochemical sensors and used to reduce cross-sensitivity by adjusting voltage to detect formaldehyde, can solve the problems of low trigger alarm threshold level, false alarm, high cross-sensitivity, etc.

Pending Publication Date: 2020-01-31
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the hazards presented by the presence of various target gases, the threshold level used to trigger an alarm may be relatively low, and the cross-sensitivity due to the presence of interference may be high enough to generate false alarms (e.g. false positives) of the target gas sensor

Method used

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  • Improved electrochemical sensor and method for detecting formaldehyde by regulating voltage to reduce cross-sensitivity
  • Improved electrochemical sensor and method for detecting formaldehyde by regulating voltage to reduce cross-sensitivity

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Embodiment Construction

[0015] It should be understood at the outset that while an illustrative implementation of one or more embodiments is described below, the disclosed systems and methods may be implemented using any number of techniques, whether currently known or not in existence. The disclosure should in no way be limited to the illustrative implementations, drawings, and techniques described below, but may be modified within the scope of the appended claims along with their full scope of equivalents.

[0016] Throughout this application, the following concise definitions of terms will apply:

[0017] The term "comprising" means including but not limited to, and should be construed in the way it is commonly used in the patent context;

[0018] The phrases "in one embodiment," "according to one 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 in more...

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Abstract

An electrochemical formaldehyde sensor (10) and a method of detecting formaldehyde are disclosed. The electrochemical formaldehyde sensor (10) may comprise a housing (12); an electrolyte disposed within the housing (12); and a plurality of electrodes in contact with the electrolyte within the housing (12), wherein the plurality of electrodes comprise a working electrode (24) comprising iridium andan applied potential of between approximately 0.9 to 1 V relative to a reversible hydrogen electrode; and a counter electrode (16). The cross-sensitivity of the sensor (10) to alcohols is less than approximately 25% of the sensitivity to formaldehyde.

Description

[0001] Cross References to Related Applications [0002] Not applicable. [0003] Statement Regarding Federally Sponsored Research or Development [0004] Not applicable. [0005] References to the Microfiche Addendum [0006] Not applicable. Background technique [0007] Electrochemical gas sensors generally include electrodes in contact with an electrolyte for detecting gas concentrations. The electrodes are electrically coupled to external circuitry through leads coupled to connector pins. When the gas contacts the electrolyte and electrodes, a reaction can occur that can create a potential difference between the electrodes and / or cause an electrical current to flow between the electrodes. The generated signal can be related to the gas concentration in the environment. [0008] While monitoring for the presence of various gases, other gases can be present which can also react within the sensor. For example, the working electrode can include a catalyst that can cataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/404
CPCG01N27/4045G01N33/0047
Inventor 肖磊K.F.E.普拉特Y.于梁枫T.郑B.彭
Owner HONEYWELL INT INC
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