Principle Introduction:
Winsen Electronics is original manufacturer of MQ-8 H2 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 H2 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 H2 gas, also has anti-interference to other gases. This sensor can detect H2, 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 :
Tips:For more parameter information, please refer to the latest manual provided by salesman.
| Model |
MQ-8 |
| Sensor Type |
Semiconductor |
| Standard Encapsulation |
Bakelite, Metal cap |
| Target Gas |
H2 |
| 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 |
Datasheet Download
