MQ5 LPG gas sensor

Hello Everyone,

I am using MQ5 Gas sensor on Arduino. I want to calibrate it for detecting LPG gas leakages. What resistor shall i use in r1 in

Also, please tell what does output on Serial Monitor show? What kind of value is it? What is ppm level when LPG gas leakage in house is dangerous?

Thank you.

It's not that kind of sensor. The sensor behaves like a resistor, but is not very accurate. You have to find a resistor and analog value by yourself for a certain concentration of gas.

The resistor is 10K to 60K according to the datasheet.

Have you done some preheat/burnin time yet? See also this: