MEMS combustible gas sensor is using MEMS micro-fabrication hot plate on a Si substrate base, gas-sensitive materials used in the clean air with low conductivity metal oxide semiconductor material. When the sensor exposed to gas atmosphere, the conductivity is changing as the detected gas concentration in the air. The higher the concentration of the gas, the higher the conductivity. Use simple circuit can convert the change of conductivity of the gas concentration corresponding to the output signal.
Character:
MEMS technology, strong structure
Low power consumption
High sensitivity
Fast response and resume
Simple drive circuit
Application:
Gas leak detection for mobile phones, computers and other consumer electronics applications, also for breathing gas detection control, smoke alarm indoor & etc.
Product model: GM-502B
Product type: MEMS VOC gas sensor
Standard package: ceramic package
Detection gas: Ethanol, formaldehyde, toluene &etc.
Detection concentration: 1~500ppm
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
