Specifications:
- Model No.: MQ137
- Sensor Type: Semiconductor
- Standard Encapsulation: Bakelite (Black Bakelite)
- Detection Gas: Ammonia
- Concentration: 5-500ppm (Ammonia)
CIRCUIT:
- Loop Voltage(Vc): ≤24V DC
- Heater Voltage(VH): 5.0V±0.2V AC or DC
- Load Resistance(RL): Adjustable
CHARACTER:
- Heater Resistance(RH): 31Ω±3Ω Room Temp
- Heater consumption(PH): ≤900mW
- Sensing Resistance(Rs): 2KΩ-15KΩ(in 50ppm NH3)
- Sensitivity(S): Rs(in air)/Rs(5000ppm CH4)≥5
- Slope(α): ≤0.6(R100ppm/R50ppm NH3)
CONDITION:
- Tem. Humidity: 20℃±2℃;65%±5%RH
- Standard test circuit: Vc:5.0V±0.1V; VH: 5.0V±0.1V
- Preheat time: Over 48 hours
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