Gas sensor and method for detecting methane gas concentration in septic tank using same

Abstract

The invention discloses a gas sensor and a method for detecting the concentration of methane gas in a septic tank by using the gas sensor. The gas sensor comprises a shell in which a cavity is arranged, wherein one end of the shell is provided with a suction nozzle and an exhausting nozzle both of which are in threaded connection with the shell; the other end of the shell is provided with water joints which are in threaded connection with the shell; an anti-explosion filtering washer, a gas detection element and a circuit board are sequentially arranged inside the shell from one end of the suction nozzle to one end of each water joint; a gas guide passageway is arranged between the suction nozzle and the anti-explosion filtering washer; one end, close to the suction nozzle, of the gas guide passageway is in threaded connection with the shell. The sensor has the advantages that the anti-explosion performance is strong, in particular, the response speed is quickened by diminishing T90. The invention further discloses a method for detecting the concentration of methane gas in the septic tank by using the gas sensor, and the method is high in the response speed.

Description

technical field [0001] The invention relates to the technical field of gas detection, in particular to a gas sensor and a method for detecting methane gas concentration in a septic tank using the same. Background technique [0002] Term Response Time T 90 It refers to the time required for the output value of the sensor to reach 90% of the stable value when the measured gas concentration flowing into the gas sensor changes step by step. [0003] At present, large amounts of methane (CH4), ammonia (NH3), hydrogen sulfide (H2S), and carbon monoxide (CO) will be produced in urban sewers, sewage treatment plants, septic tanks, biogas digesters, and garbage disposal sites Toxic, flammable, explosive and other gases, the existence of these gases lead to many explosions, poisoning, suffocation and other accidents in various places every year, so it is necessary to detect the concentration of these dangerous gases. [0004] When detecting the concentration of these dangerous gases...

AI Technical Summary

Problems solved by technology

[0004] When detecting the concentration of these dangerous gases, gas sensors are needed. The existing gas sensors have the disadvantages of poor sealing performance, weak explosion-proof performance, low sensitivity, low detection accuracy and slow response speed.

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