Description
The MQ-137 is a sensitive gas detection module designed to detect ammonia (NH₃) concentrations in the air. With both analog and digital outputs, it is ideal for monitoring air quality, detecting gas leaks, and maintaining safety standards in industrial and medical environments.
Key Features
- NH₃ Detection: High sensitivity to ammonia gas
- Dual Output: Supports analog and digital signal output
- Fast Response: Reacts quickly to changing gas levels
- Adjustable Sensitivity: Onboard potentiometer for digital threshold
- Wide Compatibility: Works with Arduino, Raspberry Pi, and other MCUs
- Long Service Life: Stable performance over time
Specification
- Model: MQ-137
- Target Gases: Ammonia (NH₃), with some sensitivity to CO
- Operating Voltage: 5V DC
- Output Modes: Analog (AO), Digital (DO, TTL)
- Analog Voltage Range: 0V – 5V
- Digital Output: 0V (LOW) or 5V (HIGH)
- Response Time: <1 second (typical)
- Preheat Time: ≥ 20 seconds
- Sensitivity Adjustment: Via onboard potentiometer
- Module Size: ~32 mm × 20 mm
- Weight: ~5 g
Application
- Ammonia (NH₃) gas leak detection
- Environmental and air quality monitoring
- Industrial safety systems
- Hospital air standard compliance
- Arduino-based gas detection projects