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The MQ-8 Hydrogen Gas Sensor Module  is a user-friendly and reliable sensor designed to detect hydrogen gas concentrations in the air. With its high sensitivity and fast response time, this sensor is ideal for various applications where monitoring hydrogen gas levels is critical. Please note that while this sensor provides valuable insights into gas concentrations, it does not provide exact measurements and is not suitable for applications requiring precise gas concentration readings.

Key Features:

  • High-quality Dual-Panel Design: The sensor features a high-quality dual-panel design, ensuring accurate and consistent performance. It is equipped with a power indicator and TTL signal output instructions for easy operation and monitoring.
  • DO Switch Signal Output: The sensor provides a DO (TTL) switch signal output, allowing for convenient integration with microcontrollers or relay modules. The TTL output signal is valid when it is low.
  • AO Analog Signal Output: In addition to the digital output, the sensor also offers an AO analog signal output. The voltage of the analog output increases with higher gas concentration levels, providing valuable information for analysis.
  • Wide Detection Range: The MQ-8 gas sensor is capable of detecting hydrogen gas concentrations ranging from 100 to 10,000 parts per million (ppm), making it suitable for a variety of applications.
  • Enhanced Sensitivity: The sensor exhibits excellent sensitivity to gas, particularly natural gas, ensuring reliable detection and accurate results.
  • Easy Positioning: The sensor is designed with four screw holes, enabling easy positioning and installation in your desired location.

Electrical Specifications:

  • Input Voltage: 5V DC power
  • Input Current: 150mA
  • Digital Output (DO): TTL digital 0 and 1 (0.1V and 5V)
  • Analog Output (AO): 0.1-0.3V (relatively clean), highest concentration voltage around 4V

Please ensure to power the heater coil with 5V, add an appropriate load resistance, and connect the output to an ADC for accurate readings. It is recommended to refer to the provided documentation for further instructions on setup and usage.

Monitor hydrogen gas concentrations reliably and conveniently with the Hydrogen Gas Sensor – MQ-8. Its easy-to-use design, high sensitivity, and wide detection range make it a valuable tool for various industries and applications. Please refer to the user guide for detailed instructions on utilizing this sensor effectively.


While the MQ-8 gas sensor provides an approximation of gas concentration trends, it is important to note that it does not provide precise gas concentration measurements. For applications requiring highly accurate gas concentration readings, more advanced and costly instruments are recommended.

Weight 0.005 kg
Dimensions 3.2 × 2.2 × 2.1 cm


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