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Interfacing MQ-8 Hydrogen Gas Sensor Module with Arduino

MQ-8 Hydrogen Gas Sensor Features

MQ series sensor uses a small heater inside with an electrochemical sensor in order to measure a different kind of gases combinations. They can be calibrated, but, in order to do that, a known concentration of measured gas or gases is needed. The MQ-8 hydrogen gas sensor is suitable for sensing hydrogen concentrations in the air. The MQ-8 can detect hydrogen gas concentrations anywhere from 100-10000ppm. This sensor has a high sensitivity and fast response time. 

Note

After turning on the module, wait 2 minutes for the internal heater to warm up.

You can download the datasheet of this module here.

MQ-8 Hydrogen Gas Sensor Pinout

This sensor has 4 pins:

  • 5V: Module power supply – 5 V
  • GND: Ground
  • DOUT: Digital output
  • AOUT: analog output

You can see pinout of this module in the image below.

Required Materials

Hardware Components

Arduino UNO R3 × 1
MQ-8 Smoke Gas Module × 1
Male to Female jumper wire × 1

Software Apps

Arduino IDE

Interfacing MQ-8 Hydrogen Gas Sensor with Arduino

Step 1: Circuit

The following circuit shows how you should connect Arduino to MQ-8 module. Connect wires accordingly.

Step 2: Code

Upload the following code to your Arduino.

    /*
  modified on Sep 28, 2020
  Modified by MohammedDamirchi from Arduino Examples
  
Home
*/ // the setup routine runs once when you press reset: void setup() { // initialize serial communication at 9600 bits per second: Serial.begin(9600); } // the loop routine runs over and over again forever: void loop() { // read the input on analog pin 0: int sensorValue = analogRead(A0); // print out the value you read: Serial.println(sensorValue); delay(20); }

After uploading the code, you can see the output in the serial monitor.

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Comments (2)

  • Gülay Reply

    I want it to buy, price please

    June 8, 2021 at 11:43 am
    • Mehran Maleki Reply

      Hi,
      The purchase links are available in the “Hardware Components” section. You can see that beneath the image of the “Required Materials”.

      June 9, 2021 at 7:34 am

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