QB055/QB084 MQ-4 Gas Sensor

1.Product Introduction

MQ-4 gas sensor is a combustible gas sensor, which can detect the concentration of combustible gas in the environment. Its working principle is based on the change of electrical properties of semiconductor gas sensitive materials. When there is combustible gas (such as methane, propane, butane, etc.), the gas sensitive materials inside the sensor will react with the gas, resulting in changes in the resistance value of the material.

It is widely used in domestic and industrial fields in methane leakage detection, gas leakage alarm and gas detection.

2.Parameter Specification

3.Wiring Diagram

4.Sample Code

1void setup(){
2  pinMode(A0, INPUT);//Set pin A0 to input mode
3  Serial.begin(9600);//Set serial port baud rate 9600
4}
5void loop(){
6  Serial.println(analogRead(A0));//The serial port shows the detection value of the MQ-4 gas sensor
7  delay(1000);
8}

5.Test Result

After uploading the code to the controller board, open the serial port monitor of the Arduino IDE, set the baud rate to 9600, and switch to the scroll mode. When pressed half with a lighter, flammable gas will be released. At this time, the gas will be sprayed to the MQ-4 gas sensor, and the following data can be seen.

6.Related Resources

7.Get One Now