MQ-137 NH3 Ammonia Gas Sensor Module
![MQ-137 NH3 Ammonia Gas Sensor Module]()
![MQ-137 NH3 Ammonia Gas Sensor Module]()
![MQ-137 NH3 Ammonia Gas Sensor Module]()
![MQ-137 NH3 Ammonia Gas Sensor Module]()
![MQ-137 NH3 Ammonia Gas Sensor Module]()
![MQ-137 NH3 Ammonia Gas Sensor Module]()
This module provides both analog and digital outputs, allowing flexible interfacing with Arduino and other microcontrollers. An onboard potentiometer enables easy adjustment of the digital output sensitivity. The sensor requires a short pre-heating period to stabilize before accurate measurements can be taken.
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MQ-137 NH3 Ammonia Gas Sensor Module
Available:In Stock
- Product SKU: KG1324
₹ 1,429
₹ 1,899
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Warehouse Details:
Specification
Description
MQ-137 Ammonia (NH₃) Gas Sensor Module
The MQ-137 Gas Sensor Module is a high-sensitivity semiconductor sensor specifically designed for detecting ammonia (NH₃) gas, with partial sensitivity to carbon monoxide (CO). It is widely used in air quality monitoring, gas leakage detection, and safety systems.This module provides both analog and digital outputs, allowing flexible interfacing with Arduino and other microcontrollers. An onboard potentiometer enables easy adjustment of the digital output sensitivity. The sensor requires a short pre-heating period to stabilize before accurate measurements can be taken.
Features
- High sensitivity to ammonia (NH₃) gas
- Wide detection range (5–500 ppm NH₃)
- Fast response time (less than 1 second)
- Stable performance with long operational life
- Analog output voltage: 0–5 V
- Digital TTL output: 0 V / 5 V
- Adjustable sensitivity via onboard potentiometer
- Can be used as both digital and analog gas sensor
- Arduino and MCU compatible
Technical Details
- Item Type: Gas Sensor
- Model: MQ-137
- Target Gas: Ammonia (NH₃)
- Detection Range: 5–500 ppm (NH₃)
- Operating Voltage: 5 V DC
- Analog Output Voltage: 0–5 V
- Digital Output Voltage: 0 V / 5 V (TTL Logic)
- Heater Resistance: 31 Ω ±3 Ω (room temperature)
- Heater Power Consumption: ≤900 mW
- Sensing Resistance: 2 kΩ – 15 kΩ (at 50 ppm NH₃)
- Sensitivity: Rs (air) / Rs (5000 ppm CH₄) ≥ 5
- Slope (α): ≤0.6 (R100ppm / R50ppm NH₃)
Applications
- Ammonia (NH₃) gas detection systems
- Air quality monitoring
- Gas leakage alarm systems
- Environmental monitoring in hospitals
- Industrial safety and standards maintenance
- Arduino-based gas sensing projects
Physical Attributes
- Length: 35 mm
- Width: 20 mm
- Height: 28 mm
- Weight: 7 g
- Compact PCB-mounted sensor module
Package Includes
- 1 × MQ-137 Ammonia (NH₃) Gas Sensor Module
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