MQ-2 Sensitive for Methane, Butane, LPG, Smoke (MQ-2) [S100]

MQ-2 Sensitive for Methane, Butane, LPG, Smoke (MQ-2) [S100]

https://www.youtube.com/watch?v=PHpsr3MPV28

*GitHub : https://github.com/rdiot/rdiot-s100.git

* Specs

Sensitive for Methane, Butane, LPG, smoke.

This sensor is sensitive for flamable and combustible gasses.

The heater uses 5V.

Sensitive material of MQ-2 gas sensor is SnO2, which with lower conductivity in clean air. When the

target combustible gas exist, The sensor’s conductivity is more higher along with the gas concentration

rising. Please use simple electrocircuit, Convert change of conductivity to correspond output signal of

gas concentration.

MQ-2 gas sensor has high sensitity to LPG, Propane and Hydrogen, also could be used to Methane

and other combustible steam, it is with low cost and suitable for different application. 

* Contents

- The MQ-2 at seeed: http://www.seeedstudio.com/wiki/Grove_-_Gas_Sensor%28MQ2%29

- DataSheet : https://www.pololu.com/file/0J309/MQ2.pdf

- Key Code

const int gasPin = A0;

  

void setup()

{

    Serial.begin(9600);

}

 

void loop()

{

    Serial.println(analogRead(gasPin));

    

    if (analogRead(gasPin) > 400)  

    {                                     

        tone(12,2000,1000); 

    }  

    delay(1000);

}