MQ-8 Hydrogen Gas Sensor Module – 100–1000ppm Detection

The MQ-8 Hydrogen Gas Sensor Module is a semiconductor gas sensor designed to detect hydrogen concentration in air. It utilizes SnO₂ sensitive material whose conductivity increases proportionally with hydrogen presence. Operating at 5V DC with an integrated heating element, it provides an analog output corresponding to gas concentration. The module offers stable performance with adjustable load resistance for calibration flexibility. Suitable for hydrogen leak detection, safety systems, and embedded gas monitoring applications.

• SnO₂ semiconductor gas sensing element
  
• Hydrogen detection range 100–1000ppm
  
• High sensitivity to hydrogen gas
  
• Analog voltage output proportional to concentration
  
• 5V DC operating voltage
  
• Integrated heater element for stable sensing
  
• Adjustable load resistance RL
  
• Fast response and recovery time
  
• Compact module design for easy integration
  
• Suitable for leak detection systems
  

• Operating Voltage: 5V DC
  
• Heating Voltage VH: 5.0V ±0.1V AC or DC
  
• Heating Resistance RH: 29Ω ±3Ω (Room Temperature)
  
• Heating Power Consumption: ≤900mW
  
• Detection Gas: Hydrogen (H₂)
• Detection Range: 100–1000ppm
  
• Sensitivity Ratio S: Rs(in air)/Rs(1000ppm H₂) ≥5
  
• Output Voltage (1000ppm H₂): 2.5–4.0V
  
• Concentration Slope α: ≤0.6 (R1000ppm/R400ppm H₂)
  
• Load Resistance RL: Adjustable
  
• Operating Temperature: 20°C ±2°C
  
• Operating Humidity: 55% ±5%RH

• MQ-8 Gas Sensor Datasheet
• MQ-8 Gas Sensor Schematic
• MQ Type Gas Sensor 3D Model
• MQ Gas sensor 3D Case 

• How to make hydrogen gas sensor - Arduino and MQ8