About the Product
MQ-8 Hydrogen Gas Sensor Module – High-Sensitivity H₂ Detection
The MQ-8 is a high-performance hydrogen gas detection sensor module designed for precise and reliable H₂ monitoring. Operating at DC 5V with a low power consumption of 150mA, it delivers both TTL digital output and analog output for flexible integration into various systems.

Built with tin dioxide (SnO₂), the sensor offers excellent conductivity in clean air and rapidly detects hydrogen-containing gases such as city gas. With a fast ~20-second warm-up time, high sensitivity, and stable operation, it’s well-suited for industrial safety systems, gas leak alarms, and embedded electronics projects.

Key Specifications:

  • Operating Voltage: DC 5V

  • Power Consumption: 150mA

  • Digital Output (DO): TTL logic (0.1V low / 5V high)

  • Analog Output (AO): 0.1–0.3V (relative to gas concentration)

  • Warm-up Time: ~20 seconds

  • Sensing Material: Tin Dioxide (SnO₂)

  • Module Size: 32mm × 20mm × 22mm