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MQ137 MQ-137 Semiconductor Gas Sensor For Domestic NH₃ Gas Alarms

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MQ137 MQ-137 Semiconductor Gas Sensor For Domestic NH₃ Gas Alarms

Model Number : MQ137 MQ-137

Place of Origin : CN

MOQ : 1PCS

Price : Negotiable

Payment Terms : L/C, D/A, D/P, T/T, Western Union, MoneyGram

Supply Ability : 5000PCS

Delivery Time : 5-8 work days

Packaging Details : Standard packaging

Detection Range : 5 - 500 ppm NH₃

Standard Circuit Conditions : ≤ 24 V DC

Heater Voltage (Vh) : 5.0 V ± 0.1 V AC or DC

Heater Resistance (Rh) : 29 Ω ± 3 Ω

Heater Consumption (Ph) : ≤ 900 mW

Operating Temperature : - 10℃ - 45℃

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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 ℃ -

MQ137 MQ-137 Semiconductor Gas Sensor For Domestic NH₃ Gas Alarms


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MQ137 MQ-137 Semiconductor Gas Sensor For Domestic NH₃ Gas Alarms Images

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