Gas Sensor MQ8 Sensitive Hydrogen Gas


MQ8 is a semiconductor sensor which can detect the presence of Hydrogen gas(H2) at concentrations from 100 to 10,000 ppm. The sensitive material used for this sensor is SnO2, whose conductivity is lower in clean air.

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It’s conductivity increases as the concentration of sensing gases increases. MQ8 Hydrogen gas sensor can be easily interfaced with Microcontrollers, Arduino Boards, Raspberry Pi etc using an Analog to Digital Converter (ADC).



  • Low Cost
  • Stable and Long Life
  • High sensitivity to Hydrogen (H2)
  • Small sensitivity to Alcohol, LGP and Cooking Fumes
  • Simple drive circuit
  • Analog and Digital Outputs
  • Trigger Level configuration Potentiometer



  • Load Resistance : 10KΩ
  • Heater Resistance : 31Ω ±5% at Room Temperature
  • Heating Consumption : < 800mW
  • Operating Temperature : -10°C ~ 50°C
  • Detection Range : 100 ~ 10,000 ppm of Hydrogen
  • Operating Voltage: DC 5V
  • Analog Output (AO): 0~5V analog output voltage
  • Digital Outout (DO): 0V or 5V output
  • Configuration: Through Potentiometer (adjusts the output level transition)
  • Preheat Duration: 20s
  • Weight: 5g
  • Dimensions: 23 x 19 x 19 mm