China Mems Ammonia Gas Sensors Nh3 Detector, Find details about China Gas Sensor, Gas Detector from Mems Ammonia Gas Sensors Nh3 Detector
MEMS ammonia gas sensors use MEMS technology to make micro-hot plates on Si-based substrates. The gas-sensitive materials used are metal oxide semiconductor materials with low conductivity in clean air. When there is a detected gas in the ambient air, the conductivity of the sensor changes. The higher the concentration of the gas, the higher the conductivity of the sensor. Using a simple circuit, the change in conductivity can be converted into an output signal corresponding to the gas concentration.
main application:
It is widely used in refrigerator gas detection, cold storage ammonia leak detection and agricultural breeding ventilation control.
Product model: GM-802B
Product type: MEMS ammonia gas sensor
Standard package: ceramic package
Detection gas: ammonia
Detection concentration: 1~300ppm(NH3)
Standard circuit conditions
Loop voltage VC: ≤24V DC
Heating voltage VH: 2.0V±0.1V AC or DC
Load resistance RL: adjustable
Gas sensor characteristics under standard test conditions
Heating resistance RH: 80Ω±20Ω (room temperature)
Heating power consumption PH: ≤45mW
Sensitive body resistance RS: 1KΩ~30KΩ (in 50ppmNH3)
Sensitivity S: R0(in air)/Rs(in 50ppmNH3)≥3
Concentration slope α: ≤0.9(R200ppm/R50ppmNH3)
Standard test conditions
Temperature, humidity 20ºC±2ºC; 55%±5%RH
Standard test circuit:
VH: 2.0V±0.1V;
VC: 5.0V±0.1V