Product Introduction
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Hydrogen Sensor (H2 Sensor) MQ-8 Product Description
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The gas sensing material used in the MQ-8 gas sensor is tin dioxide (SnO2) with low conductivity in clean air. When hydrogen gas is present in the environment, the sensor's conductivity increases with the concentration of combustible gas in the air. A simple circuit can convert the change in conductivity into an output signal corresponding to the gas concentration.
The MQ-8 gas sensor has high sensitivity to hydrogen and is also ideal for monitoring other hydrogen-containing gases. This sensor can detect a variety of hydrogen-containing gases, especially city gas, and is a low-cost sensor suitable for multiple applications.
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Hydrogen Sensor (H2 Sensor) MQ-8Sensor Features
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Good sensitivity to hydrogen over a wide concentration range
Long life, low cost
Simple drive circuit required
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Hydrogen Sensor (H2 Sensor) MQ-8Main Applications
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Home gas leak alarms
Industrial combustible gas alarms
Portable gas detectors
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Hydrogen Sensor (H2 Sensor) MQ-8Technical Specifications
| Product Model |
MQ-8 |
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| Product Type |
Semiconductor gas sensing element |
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| Standard Package |
Bakelite (black bakelite) |
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| Detection Gas |
Hydrogen |
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| Detection Concentration |
100-1000ppm (hydrogen) |
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| Standard Circuit Conditions |
Loop Voltage |
Vc |
≤24V DC |
| Heating Voltage |
VH |
5.0V±0.2V ACorDC |
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| Load Resistance |
RL |
Adjustable |
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| Gas Sensing Element Characteristics under Standard Test Conditions |
Heating Resistance |
RH |
31Ω±3Ω (room temperature) |
| Heating Power Consumption |
PH |
≤900mW |
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| Surface Resistance of Sensing Body |
Rs |
2KΩ-20KΩ(in 1000ppm H2 ) |
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| Sensitivity |
S |
Rs(in air)/Rs(1000ppm hydrogen)≥5 |
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| Concentration Slope |
α | ≤0.6(R5000ppm/R3000ppm CH4) |
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| Standard Test Conditions |
Temperature, Humidity |
20℃±2℃；65%±5%RH |
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| Standard Test Circuit |
Vc:5.0V±0.1V； VH: 5.0V±0.1V |
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| Preheating Time |
No less than 48 hours |
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