Gas sensor, gas detector, and self-testing and self-correcting method therefor

Abstract

The related gas sensor for fuel cell comprises: based on traditional device, designing a cell core expansion hole and an air hole, using gel electrolyte instead of common liquid, adding a constant moisture device for sensor. It also uses the sensor to prepare a gas detector with self test and adjust function and free to environment effect and calibration gas source. This invention overcomes defects in prior art.

Description

technical field [0001] The invention relates to a gas sensing and detecting device, more specifically, a fuel cell gas sensor with long service life and more reliable performance, and a gas detector made of the fuel cell gas sensor. Background technique [0002] The fuel cell was invented by the British William Grove in 1839 and has been widely used in gas sensors in recent decades. Generally, a fuel cell gas sensor mainly includes a working electrode (usually called an anode) and a counter electrode (usually called a cathode), and the working electrode and the counter electrode are separated by an electrolyte. Electrochemical oxidation of the "fuel" gas at the working electrode results in the flow of electrons from the anode to the cathode, ie the formation of an electrical current. Among them, the current intensity is directly proportional to the gas concentration. The principle and structure of a typical gas sensor can be found in US Pat. No. 5,738,773. [0003] The fu...

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Problems solved by technology

[0007] In view of the above-mentioned defects in the prior art, the present invention firstly solves the problems that electrolyte leakage occurs in traditional fuel cell gas sensors, and the service life is easily affected by ambient temperature and humidity.

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