Introduction

The MQ2 Gas Sensor module is useful for gas leakage detecting. It can detect combustible gas, smoke and so on. The sensitivity can be adjusted by the potentiometer, there are two types of the output: analog output and digital output, so, it’s able to read analog data and digital data. It can detect these gas: LPG, natural gas, Town gas. Remember to operate it in the controlled environment. there are details of the MQ gas sensor.

Symbol        Detect Gas                       Detect Concentration

MQ-2          combustible gas,                  300-10000ppm

                   Smoke

MQ-5          LPG, natural gas,                 300-10000ppm

                   Town gas

Features

Working voltage: 5V

Working Current: 150mA

DO: TTL output

AO: Analog output, the value will increase when detect much more gas.

Preheat time: Over 20s

Resource