GM-702B MEMS Carbon Monoxide Gas Sensor

For residential and industrial CO leakage detection.

Applications :

*CO alarm
*Consumer electronics

Product Advantages:
  • *MEMS technology
  • *strong structure
  • *Low power consumption
  • *High sensitivity to CO gas
  • *Fast response and resume
  • *Simple drive circuit
Product Description:

MEMS carbon monoxide 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-702B
Sensor Type MEMS CO Gas Sensor
Standard Encapsulation Ceramic
Detection Gas CO gas
Detection Range 5~5000ppm (CO)
Standard Circuit Conditions Loop Voltage Vc ≤24V DC
Heater Voltage VH 2.5V±0.1V AC or DC (high temp.) 0.5V±0.1V AC or DC (low temp.)
Heating Time TL 60s±1s (high temp.) 90s±1s (low temp.)
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 150ppm CO)
Sensitivity S R0(in air)/Rs(in 150ppmCO)≥3
Standard test conditions Temp. Humidity 20℃±2℃;55%±5%RH
Standard test circuit VH: 2.5V±0.1V (high temp.) 0.5V±0.1V (low temp.) VC : 5.0V±0.1V
The Latest Manual

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