MQ-8 Semiconductor Sensor for Hydrogen Gas
Household flammable Gas Sensor
*It is widely used in domestic gas leakage alarm, industrial flammable gas alarm and portable gas detector.
- *It has good sensitivity to hydrogen gas in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.
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.
|Standard Encapsulation||Bakelite, Metal cap|
|Detection range||100～1000ppm(H2 gas)|
|Standard Circuit Conditions||Loop Voltage||Vc||≤24V DC|
|Heater Voltage||VH||5.0V±0.1V AC or DC|
|Sensor character under standard test conditions||Heater Resistance||RH||29Ω±3Ω(room tem.)|
|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|
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