The analog gas sensor – MQ2 is used in gas leakage (like Smoke methane and liquified flammable gas) detecting equipment in consumer and industry markets, this sensor is suitable for detecting LPG, i-butane, Propane, Methane, Alcohol, Hydrogen, and Smoke. It has high sensitivity and fast response time and the sensitivity can be adjusted using the potentiometer.

This is very easy to use low-cost semiconductor Gas sensor Module with analog and digital output. This module uses the MQ2 Smoke & Flammable gas sensor as a gas sensing element. It requires no external components just plug in Vcc & ground pins and you are ready to go.

Using this module you can easily interface MQ2 Smoke & Combustible gas Sensor to any Microcontroller, Arduino, or even Raspberry Pi.