• H2 Gas Sensor

MQ-8 Hydrogen Sensor

  • • Detection Gas: Hydrogen, H2 sensor
  • • Detection Range: 100~1000ppm(H2)
  • • Application: Domestic gas leakage alarm

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Principle Introduction:
Winsen Electronics is original manufacturer of MQ-8 Hydrogen gas sensor, H2 gas sensor, with 80% market share in gas sensor field.
Sensitive material of MQ-8 gas sensor is SnO2, which with lower conductivity in clean air. When hydrogen gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.
MQ-8 gas sensor has high sensitivity to hydrogen gas, also has anti-interference to other gases. This sensor can detect hydrogen, especially city gas. It is a kind of low-cost sensor for kinds of applications.
Applications :
It is widely used in domestic gas leakage alarm, industrial flammable gas alarm and portable gas detector.
Technical parameters :
Model MQ-8
Sensor Type Semiconductor
Standard Encapsulation Bakelite, Metal cap
Target Gas Hydrogen
Detection range 100~1000ppm(H2 gas)
Standard Circuit Conditions Loop Voltage Vc ≤24V DC
Heater Voltage VH 5.0V±0.1V AC or DC
Load Resistance RL Adjustable
Sensor character under standard test conditions Heater Resistance RH 29Ω±3Ω(room tem.)
Heater consumption PH ≤900mW
Sensitivity S Rs(in air)/Rs(in 1000ppm H2)≥5
Output Voltage Vs 2.5V~4.0V(in 1000ppm H2)
Concentration Slope α ≤0.6(R1000ppm/R400ppm H2)
Standard test conditions Tem. Humidity 20℃±2℃;55%±5%RH
Standard test circuit Vc:5.0V±0.1V; VH:5.0V±0.1V
Preheat time Over 48 hours
Reference Circuit :
 

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