GM-802B Ammonia Gas Sensor
The MEMS ammonia gas sensor is composed of a Si-based micro-hot plate made of MEMS technology and a metal-oxide-semiconductor 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.
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Sensor characteristics
This product adopts MEMS technology, with firm 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 service life.
Main application
It is widely used in gas detection of refrigerators, ammonia leakage of refrigerators and ventilation control of agricultural breeding.
Technical indicators
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Product model |
GM-802B |
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product type |
MEMS ammonia gas sensor |
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Standard package |
Ceramic packaging |
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detect gas |
Ammonia, etc |
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Detection concentration |
1ppm～300ppm(NH3) |
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Standard circuit conditions |
Loop voltage |
VC |
≤24V DC |
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Heating voltage |
VH |
2.0V±0.1V AC or DC |
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Load resistance |
RL |
可调 |
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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 |
≤45mW |
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sensitive body |
RS |
1KΩ～30KΩ(in 50ppm NH3) |
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Sensitivity |
S |
Ro(in air)/Rs(in 50ppmNH3)≥3 |
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Concentration slope |
α |
≤0.9(R200ppm/R50ppmNH3) |
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Standard Test Conditions |
temperature humidity |
20℃±2℃；55%±5%RH |
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Standard Test Circuit |
VC:5.0V±0.1V； |
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Note: Product parameters are subject to change without prior notice
production workshop
patent certificate
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