The MQ-2 Gas Sensor adopts MQ-2 gas sensitive components, and it is very sensitive to smoke and methane gas in the air .

You can directly insert it into Arduino sensor shield with a 3p sensor connecting line, programming through Arduino mircocontroller. Combined with relay module and buzzer module, you can make smog announciator, methane leak alarm, automatic smoke exhaust fan etc. It is an ideal sensor to make indoor air meeting environmental protection standard.

Attention:this sensor equipped with sensitivity control potentiometer.