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HomeArduinoGuide for MQ-2 Gas/Smoke Sensor with Arduino
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Guide for MQ-2 Gas/Smoke Sensor with Arduino

Posted by: Alvin Jin , May 8, 2016

This guide shows how to build a smoke detector that beeps when it detects flammable gas or smoke.

The MQ-2 Gas Sensor

The MQ-2 smoke sensor is the one in the following figure:

 

smoke-sensor

The MQ-2 smoke sensor is sensitive to smoke and to the following flammable gases:

  • LPG
  • Butane
  • Propane
  • Methane
  • Alcohol
  • Hydrogen

The resistance of the sensor is different depending on the type of the gas.

The smoke sensor has a built-in potentiometer that allows you to adjust the sensor sensitivity according to how accurate you want to detect gas.

For more details, please refer to the original post

Guide for MQ-2 Gas/Smoke Sensor with Arduino

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