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21 Jun 2015

FISYBZAIB2BSPGJ.MEDIUM

by codebender_cc @ instructables.com:

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. The output is an analog signal and can be read with an analog input of the Arduino.

The MQ-2 Gas Sensor module is useful for gas leakage detecting in home and industry. It can detect LPG, i-butane, propane, methane ,alcohol, hydrogen and smoke.

Some modules have a built-in variable resistor to adjust the sensitivity of the sensor.

How to use MQ2 Gas Sensor – Arduino Tutorial – [Link]

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