GM-202B MEMS Smoke Gas Sensor
For the fixed or portable smoke detector or alamers for domestic and industrial application
Applications :
*domestic smoke alamers
*industrial smoke alamers
*portable smoke detector
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 smoke 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-202B | ||
| Sensor Type | MEMS | ||
| Standard Encapsulation | Ceramic | ||
| Detection Gas | CH4, C3H8 &etc. | ||
| Detection Range | 1~5000ppm (C3H8) | ||
| 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 C3H8) | |
| Sensitivity | S | R0(in air)/Rs(in 5000ppmCH4)≥1.5 | |
| Concentration Slope | α | ≤0.6(R100ppm/R30ppmC3H8) | |
| 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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