The MEMS carbon monoxide gas sensor uses a MEMS process to fabricate a micro-hot plate on a Si-based substrate. The gas-sensitive material used is a metal oxide semiconductor material 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:
Carbon monoxide gas leak alarm for household use, industrial carbon monoxide gas alarm, portable carbon monoxide gas detector, etc.
Product model: GM-702B
Product type: MEMS carbon monoxide gas sensor
Standard package: ceramic package
Detection gas: carbon monoxide
Detection concentration: 5~5000ppm(CO)
Standard circuit conditions
Loop voltage VC: ≤24V DC
Heating voltage VH: 2.5V±0.1V AC or DC (high temperature)/0.5V±0.1V AC or DC (low temperature)
Heating time TL: 60s±1s (high temperature), 90s±1s (low temperature)
Load resistance RL: adjustable
Gas sensor characteristics under standard test conditions
Heating resistance RH: 80Ω±20Ω (room temperature)
Heating power consumption PH: ≤50mW
Sensitive body resistance RS: 1KΩ~30KΩ (in 150ppmCO)
Sensitivity S: R0(in air)/Rs(in 150ppmCO)≥3
Standard test conditions
Temperature and humidity: 20ºC±2ºC; 55%±5%RH
Standard test circuit:
VH: 2.5V±0.1V (high temperature)/0.5V±0.1V (low temperature)
VC: 5.0V±0.1V
