MQ137 MQ-137 Semiconductor Gas Sensor For Domestic NH₃ Gas Alarms
Price:
Negotiable
MOQ:
1PCS
Delivery Time:
5-8 work days
Product Description
MQ137 Semiconductor Gas Sensor For Domestic NH₃ Gas Alarms
Working Principle:
The sensitive material SnO₂ of the MQ137 gas sensor has lower conductivity in clean air. When ammonia gas is present, the sensor's conductivity increases with the rise of gas concentration. Users can convert the change of conductivity into a corresponding output signal of gas concentration through a simple circuit.
Applications:
- Domestic NH₃ gas alarms
- Industrial NH₃ gas leakage alarms
- Portable NH₃ gas detectors
|
Parameter |
Symbol |
Value |
Unit |
Remarks |
|---|---|---|---|---|
| Detection Range | - | 5 - 500 | ppm | For NH₃ |
| Standard Circuit Conditions (Loop Voltage) | Vc | ≤ 24 | V DC | - |
| Heater Voltage | Vh | 5.0 V ± 0.1 V | - | AC or DC |
| Load Resistance | Rl | Adjustable | - | - |
| Heater Resistance | Rh | 29 Ω ± 3 Ω | - | At room temperature |
| Heater Consumption | Ph | ≤ 900 | mW | - |
| Sensitivity | S | Rs (in air)/Rs (50 ppm NH₃) ≥ 2 | - | - |
| Output Voltage | △Vs | ≥ 0.5 | V | In 50 ppm NH₃ |
| Concentration Slope | α | ≤ 0.6 | - | R₂₀₀ ppm/R₅₀ ppm NH₃ |
| Standard Test Temperature | - | 20℃ ± 2℃ | - | - |
| Standard Test Humidity | - | 55% ± 5% | RH | - |
| Pre-heat Time | - | Over 48 | hours | - |
| Operating Temperature | - | -10 - 45 | ℃ | - |
| Storage Temperature | - | -20 - 70 | ℃ | - |
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Company
ShenzhenYijiajie Electronic Co., Ltd.
Location
Room 3306AB 33rd Floor, SEG Plaza,Huaqiang North Road, Futian District, Shenzhen Guangdong Province 518028
Contact Person
Xu