This is a very easy to use low cost semiconductor Gas sensor Module with analog and digital output. This module uses MQ4 Methane gas sensor as a gas sensing element. It requires no external components just plug in Vcc & ground pins and you are ready to go.
Specification of MQ4 GAS Sensor Module:-
Power Supply: 5 Volts
Interface Type: Analog & Digital
High Sensitivity to Methane & small sensitivity to smoke & alcohol
Low Cost.
Stable & Long Life.
On board Power indication.
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