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What is the name of the mesh surrounding the MQ2 Gas Sensor?

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What is the name of the mesh surrounding the MQ2 Gas Sensor?

(a) Anti-Heat Mesh

(b) Anti-Explosion Mesh

(c) Anti-Air Mesh

(d) Filtration Mesh

This question was addressed to me in semester exam.

My query is from MQ2 Gas Sensor Module in portion Interfacing of Sensors, Actuators, and Other Modules of Arduino

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Correct choice is (b) Anti-Explosion Mesh

To explain: The MQ2 Gas Sensor is surrounded by a mesh called Anti-Explosion Mesh. This protects the actual sensor inside from combusting as it remains in a heated condition during normal operation and coming into contact with gases like methane or butane or LPG may ignite the gas and cause dangerous accidents.

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