MQ-8 Gas Sensor





This sensor module has an MQ-8 as the sensor component and has a protection resistor and an adjustable resistor on-board. The MQ-8 gas sensor is highly sensitive hydrogen and less sensitive to alcohol, and cooking fume. It could be used in gas leakage detection appliance in family and industry. The resistance of the sensor component changes as the concentration of the target gas changes.


  • Continuous Analog output
  • 3-pin interlock connector
  • Low cost and compact size

Standard Working Condition

Symbol Parameter Name Technical Condition Remarks
VC Circuit voltage 5V±0.1 AC or DC
VH Heating voltage 5V±0.1 AC or DC
RL Load resistance 10Kohm  
RH Heater resistance 31Kohm±5% Room temperature
PH Heating consumption Less than 800mW  

Environment Condition

Symbol Parameter Name Technical Condition Remarks
TO Operating Temp. -10°C-50°C  
TS Storage Temp. -20°C-70°C  
RH Relative Humidity <95%  
O2 Oxygen Concentration 21%(standard condition) Oxygen concentration can affect sensitivity Minimum value is 2%

Sensitivity Characteristics

Symbol Parameter Name Technical Condition Remarks
RS Sensor Resistance 10Kohm-60Kohm (1000ppm LPG) Detecting concentration Scope: 100-10000ppm H2
α (1000ppm/4000ppm H2) Concentration slope rate ≤0.6
Standard detecting Condition Temp.: 20°C±2°C VC: 5V±0.1
Humidity:65%±5% VH:5V±0.1
Preheating Time Over 24 hours


IMG_0969 IMG_0966 IMG_0968



There are no reviews yet.

Be the first to review “MQ-8 Gas Sensor”

Your email address will not be published. Required fields are marked *