The MQ series of gas sensors use a small heater inside with an electro-chemical sensor. They are sensitive for a range of gasses and are used indoors at room temperature. They can be calibrated more or less (see the section about “Load-resistor” and “Burn-in”) but a know concentration of the measured gas or gasses is needed for that. The output is an analog signal and can be read with an analog input of the Arduino.
The Gas Sensor (MQ2) module is useful for gas leakage detecting(in home and industry). It can detect LPG, i-butane, methane, alcohol, Hydrogen, somke and so on. Based on its fast response time. measurements can be taken as soon as possible. Also the sensitivity can be adjusted by the potentiometer.
- Interface type: Analog
- Wide detecting scope
- Fast response and High sensitivity
- Simple drive circuit
- Stable and long life
- Size:36.4×26.6mm (1.4×1”)