GM-502B MEMS VOC Gas Sensor
For gas leak detection for mobile phones, computers and other consumer electronics applications and breathing gas detection control, smoke alarm indoor & etc.
Applications :
*Gas leak detection for mobile phones, computers and other consumer electronics applications
*Breathing gas detection control
*Indoor smoke alarm
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 combustible 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-502B | ||
| Sensor Type | MEMS VOC Sensor | ||
| Standard Encapsulation | Ceramic | ||
| Detection Gas | Ethanol, formaldehyde, toluene &etc. | ||
| 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 50ppm ethanol )≥3.0 | |
| 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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