Gas-sensitive controller circuit

Published:2011/3/29 22:26:00 Author:Jessie | Keyword: Gas-sensitive controller | From:SeekIC

This paper uses gas sensitive components and TWH8751 to compose gas-sensitive controller, it can be widely used in coal mine, chemical industry, metallurgy and family, etc. When RQ touch combustible gas, theresistance drops, when the gas concentrations reach a certainlevel, 8751will connect andmake relay work, R1 is work current to limit RQ, which can lengthen the service life of RQ components. W is the sensitivity controllor, according to some gas concentrations, it adjusts to a certain value, make the decline of RQ, TWH8751 connected and work, achieve purpose of control.



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