GM-302B MEMS Alcohol Gas Sensor

For consumer electronics products alcohol detector and drink supervision

Applications :

*consumer electronics products alcohol detector
*drink supervision to motorists and other risk operators

Product Advantages:
  • *MEMS technology, Strong construction
  • *Good shock resistance
  • *Small sizes and low power consumption
  • *Fast response and resume
  • *Simple drive circuit, Long lifespan
Product Description:

MEMS alcohol 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.

Technical Parameters:
Part No. GM-302B
Sensor Type MEMS
Standard Encapsulation Ceramic
Detection Gas Ethanol vapor
Detection Range 1~500ppm
Standard Circuit Conditions Loop Voltage Vc ≤24V DC
Heater Voltage VH 2.5V±0.1V AC or DC
Load Resistance RL Adjustable
Sensor character under standard test conditions Heater Resistance RH 80Ω±20Ω(room temperature)
Heater consumption PH ≤50mW
sensitive materials resistance RS 1KΩ~30KΩ(in 50ppm Ethanol)
Sensitivity S R0(in air)/Rs(in 5000ppm Ethanol)≥3.0
Concentration Slope α ≤0.9(R100ppm/R30ppm Ethanol)
Standard test conditions Temp. Humidity 20℃±2℃;55%±5%RH
Standard test circuit VH:2.5V±0.1V;VC :5.0V±0.1V
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