Project 15 Analog Gas Sensor

1.Introduction This analog gas sensor - MQ2 is used in gas leakage detecting equipment in consumer electronics and industrial markets. This sensor is suitable for detecting LPG, I-butane, propane, methane, alcohol, Hydrogen and smoke. It has high sensitivity and quick response. In addition, the sensitivity can be adjusted by the potentiometer.

2.Specification

• Power supply: 5V

• Interface type: Analog

• Wide detecting scope

• Quick response and High sensitivity

• Simple drive circuit

• Stable and long lifespan

• Size: 49.7*20mm

• Weight: 8g

3.Connection Diagram

4.Sample Code

///Arduino Sample Code
void setup()
{
  Serial.begin(9600); //Set serial baud rate to 9600 bps
}

void loop()
{
    int val;
    val=analogRead(0);//Read Gas value from analog 0
    Serial.println(val,DEC);//Print the value to serial port
    delay(100);
}