GM-202B smoke gas sensor
The MEMS smoke gas sensor is composed of a Si-based micro-hot plate based on MEMS technology and a metal oxide semiconductor gas sensing material with low conductivity in clean air. When the detected gas exists in the ambient air, the conductivity of the sensor changes. The higher the concentration of the gas, the higher the conductivity of the sensor. The change in conductivity can be converted into an output signal corresponding to the gas concentration using a simple circuit.
Sensor Features
This product adopts MEMS technology, with solid structure and high sensitivity to smoke and propane; it has the advantages of small size, low power consumption, high sensitivity, fast response recovery, simple driving circuit, good stability and long life.
main application
Widely used in household smoke alarms, industrial smoke alarms and portable smoke detection instruments.
Technical indicators
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Product number |
GM-202B |
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product type |
MEMS smoke gas sensor |
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standard package |
Ceramic package |
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detect gas |
smoke, propane |
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Detection concentration |
10ppm-5000ppm(C3H8) |
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Standard Circuit Conditions |
loop voltage |
Vc |
≤24V DC |
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heating voltage |
VH |
2.5V±0.1V ACorDC |
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Load Resistance |
RL |
adjustable |
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Gas sensor characteristics under standard test conditions |
heating resistance |
RH |
80Ω±20Ω（room temperature） |
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Heating power consumption |
PH |
≤50mW |
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Sensitive body resistance |
Rs |
1KΩ-30KΩ(in 50ppm C3H8) |
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Sensitivity |
S |
Ro(in air)/Rs(50ppm C3H8)≥1.5 |
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Concentration slope |
α |
≤0.6(R100ppm/R30ppmC3H8) |
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Standard Test Conditions |
temperature humidity |
20℃±2℃；55%RH±5%RH |
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Standard Test Circuit |
Vc:5.0V±0.1V； VH:2.5V±0.1V |
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Note: Product parameters are subject to change without prior notice
production workshop
patent certificate
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