MQ-4 : METHANE NATURAL GAS DETECTOR SENSOR

                              The MQ4 is a simple-to-use compressed natural gas (CNG) sensor, suitable for sensing natural gas (composed of mostly Methane [CH4]) concentrations in the air. The MQ4 can detect natural gas concentrations anywhere from 200 to 10000ppm. We can interface MQ4  sensor with Arduino to detect the presence of methane.

            

Application:

• The MQ-4 sensor can detect or measure Methane and natural gases.
• To avoid fire accidents in methane industries.
• To indicate the level of methane in a product.

Sample Project With Arduino:

                                In this we going to turn ON the LED whenever the MQ-4 sensor senses  the presence of methane. 

Materials required:

• MQ-4 gas sensor
• Arduino UNO
• Red LED
• Jumper wires

Circuit:

Code:

int sensorpin = 8;

int LED = 13;

void setup() {

  Serial.begin(9600);

  pinMode(sensorpin, INPUT);

  pinMode(LED, OUTPUT);

  digitalWrite(LED, LOW);

  Serial.println("MQ");

}

void loop() {

  if(digitalRead(sensorpin) == LOW)

  {

    digitalWrite(LED, HIGH);

    Serial.println("Detected");

    delay(500);  }

  else {

    digitalWrite(LED, LOW);

    Serial.println("Not Detected");

    delay(500);  }}