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MQ-8 Gas Sensor Module For Hydrogen Gas Detector Module

MQ-8 Gas Sensor Module-Robocraze
MQ-8 Gas Sensor Module-Robocraze
MQ-8 Gas Sensor Module-Robocraze
MQ-8 Gas Sensor Module-Robocraze
  • MQ-8 Gas Sensor Module-Robocraze
  • MQ-8 Gas Sensor Module-Robocraze
  • MQ-8 Gas Sensor Module-Robocraze
  • MQ-8 Gas Sensor Module-Robocraze

MQ-8 Gas Sensor Module For Hydrogen Gas Detector Module

Regular price
Rs. 96
Sale price
Rs. 96
Regular price
Rs. 140
You save Rs. 44
31% off
You save Rs. 44
Unit price
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  • Using high-quality dual-panel design, with power indicator and TTL signal output instructions;
  • The switching signal having a DO (TTL) output and analog output AO;
  • A TTL output valid signal is low . ( Low-level signal when the output light can directly connect to the microcontroller or relay module )
  • The higher the voltage, the concentration of the analog output voltage is higher.
  • A hydrogen gas detection with good sensitivity.
  • There are four screw holes for easy positioning ;

MQ-8 Gas Sensor Module

The MQ-8 gas sensor module is a device that can detect the presence of hydrogen gas in the air. It is commonly used in applications such as gas leak detectors, safety devices, and industrial control systems. The MQ-8 sensor operates by using a chemical reaction between the hydrogen gas and a conductive metal oxide to produce a current. The magnitude of the current is proportional to the concentration of hydrogen gas in the air. The sensor can be used to detect hydrogen gas concentrations in the range of 100-10000 ppm.
Using a simple circuit to convert the change in conductivity of the gas concentration corresponding to the output signal. MQ-8 hydrogen gas sensor of high sensitivity, the monitoring of the other hydrogen-containing gas is also very satisfactory.
This sensor can detect a wide range of hydrogen gas, city gas, in particular, is a low-cost sensor for a variety of applications. Suitable for home or industrial hydrogen leakage monitoring devices. Can not interfere with ethanol vapor, soot, carbon monoxide, and other gases.


  • Detect leakages in the industry
  • Used in mines
  • Can be used in refrigerators and AC

Package Includes:

  • 1 x MQ8 Gas Sensor Module

Gas Sensor Specifications

Model  MQ8 Gas Sensor 
Operating Voltage 5V (DC)
Current Consumption 150 mA
Do output TTL digital 0 and 1 ( 0.1 and 5V)
Ao output 0.1-0 .3 V (Relative to Pollution )
Dimensions  3.2 x 2.1 x 2.1cms
Weight  5 grams


1. What are gas sensors? How do they work?

  • Gas sensors (also known as gas detectors) are electronic devices that detect and identify different types of gasses. They are commonly used to detect toxic or explosive gasses and measure gas concentration. 
    Gas sensor detects the presence or concentration of gases in the atmosphere. Based on the concentration of the gas the sensor produces a corresponding potential difference by changing the resistance of the material inside the sensor, which can be measured as output voltage. Based on this voltage value the type and concentration of the gas can be estimated.

2. How to use MQ-8 Gas Sensor?

  • Power the module with 5V and you should notice the power LED on the module to glow and when no gas it detected the output LED will remain turned off meaning the digital output pin will be 0V. Remember that these sensors have to be kept on for pre-heating time before you can actually work with it. Now, introduce the sensor to the gas you want to detect and you should see the output LED to go high along with the digital pin, if not use the potentiometer until the output gets high. Now every time your sensor gets introduced to this gas at this particular concentration the digital pin will go high (5V) else will remain low (0V).