MQ-137 Ammonia ( NH₃ ) Gas Sensor Module

Product Overview

The MQ-137 Ammonia Sensor Module is a high-sensitivity gas sensor designed for detecting ammonia (NH₃) in the air. It is widely used in industrial, environmental monitoring, and safety applications. The module features an analog and digital output, making it easy to integrate with microcontrollers and monitoring systems.

Key Features

1. Ammonia Gas Detection: Specially designed for detecting NH₃ gas in the environment.
2. High Sensitivity: Provides accurate and reliable readings of ammonia concentrations.
3. Dual Output: Supports both analog and digital output signals.
4. Adjustable Sensitivity: Features a built-in potentiometer for fine-tuning detection levels.
5. Wide Operating Voltage: Works with 5V DC power supply.
6. Long Lifespan & Stability: Offers durability and consistent performance over time.

Technical Specifications

1. Gas Detected: Ammonia (NH₃)
2. Operating Voltage: 5V DC
3. Detection Range: 1 – 500 ppm (parts per million)
4. Output: Analog (voltage variation) and digital (high/low signal)
5. Response Time: ≤10 seconds
6. Preheating Time: ≥24 hours for optimal accuracy
7. Operating Temperature: -10°C to 50°C
8. Dimensions: 32mm x 20mm

Benefits

1. Reliable Ammonia Detection: Accurately detects NH₃ levels for safety and monitoring purposes.
2. Easy Integration: Compatible with Arduino, Raspberry Pi, ESP8266, and other microcontrollers.
3. Adjustable Threshold: Digital output threshold can be set using the onboard potentiometer.
4. Versatile Applications: Ideal for industrial safety, agricultural monitoring, and air quality analysis.
5. Compact & Durable: Small-sized module with a stable, long-lasting sensor.

Usage Instructions

1. Wiring:
   • VCC → 5V
   • GND → Ground
   • A0 → Analog signal output
   • D0 → Digital signal output
2. Calibration: Allow the sensor to preheat for at least 24 hours before first use.
3. Testing: Monitor analog output for real-time readings or use the digital output with an LED/buzzer for threshold-based alerts.
4. Integration: Implement sensor readings in microcontroller code for real-time monitoring and alerts.

Safety & Storage

1. Avoid Exposure to Strong Vapors: Keep away from alcohol, smoke, and strong chemical gases when not in use.
2. Ensure Proper Ventilation: Operate in well-ventilated areas for accurate readings.
3. Store in a Dry Place: Keep in a moisture-free environment to maintain sensor accuracy.

Applications

1. Industrial gas monitoring and safety systems.
2. Air quality monitoring in agricultural environments.
3. Ammonia leak detection in chemical plants.
4. Environmental pollution control and research.
5. Smart home and IoT-based gas monitoring solutions.

Why Choose MQ-137 Ammonia Sensor Module?

The MQ-137 provides an effective and accurate solution for ammonia gas detection in various industrial, environmental, and safety applications. With dual output support, adjustable sensitivity, and easy integration, it is an excellent choice for real-time gas monitoring.