Gas detection module MQ-2 (Methane Sensor Module)

Gas detection module MQ-2  (Methane Sensor Module)

Specifications

•     Detector Type : ZYMQ - 2 Gas Sensor
•     Detectable Concentration : 300-10000ppm (flammable gas)
•     Operating Voltage: 5V DC (VCC Pin)
•     Dual Signal Output (analog (AO pin) and TTL (DO pin) level output)
•     TTL output signal is normally low, goes high when has is detected. Threshold is adjusted with the onboard potentiometer
•     0 ~ 5V analog output voltage, the higher the concentration, the higher the voltage
•     Indicator LEDs
•     Power
•     DO (Digital Output On)
•     Dimensions (approximate) : 32mm x 20mm x 27mm LxWxH (1.25 x 0.8 x 1.1 inches)
•     Weight : 7 grams

Pin connections.

Arduino Connection Diagram

Arduino exsample code

/* Testing MQ-2 GAS sensor with serial monitor
   Suitable for detecting of LPG, i-butane, propane, methane ,alcohol, Hydrogen or smoke
   More info: http://www.ardumotive.com/how-to-use-mq2-gas-sensor-en.html
   Dev: Michalis Vasilakis // Date: 11/6/2015 // www.ardumotive.com                     */

const int gasPin = A0; //GAS sensor output pin to Arduino analog A0 pin

void setup()
{
    Serial.begin(9600); //Initialize serial port - 9600 bps
}

void loop()
{
    Serial.println(analogRead(gasPin));
    delay(1000); // Print value every 1 sec.
}

 

 

 

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