MQ-137 Ammonia Gas NH3 Sensor Module

0 /5.0 (0 reviews)

The MQ-137 Ammonia Gas NH3 Sensor Module detects ammonia concentrations in air, making it ideal for industrial safety, environmental monitoring, and leak detection systems. It offers analog and digital outputs for easy integration with microcontrollers like Arduino and Raspberry Pi. With high sensitivity and a fast res...

Need More Information?

Message Us Now

Detect ammonia gas with precision using the MQ-137 Ammonia Gas NH3 Sensor Module. Whether you're building a safety system for industrial environments, monitoring air quality in agricultural settings, or developing a smart home solution, this sensor delivers reliable performance at an affordable price.

The MQ-137 sensor offers high sensitivity to ammonia (NH3) and is also responsive to other gases like benzene, alcohol, and smoke. It features both analog and digital outputs, making it easy to interface with microcontrollers like Arduino, Raspberry Pi, and other development boards. The onboard potentiometer allows you to adjust the sensitivity threshold for your specific application.

With a wide detection range and fast response time, this module is ideal for projects requiring real-time gas monitoring. Its compact design and durable construction ensure long-term stability, while the simple 4-pin connection (VCC, GND, DO, AO) makes integration quick and hassle-free. Power it with 5V DC and start sensing immediately.

Upgrade your gas detection projects with the MQ-137 Ammonia Gas NH3 Sensor Module—a cost-effective, versatile solution for makers, engineers, and students alike.

Specifications

Model

MQ-137

Target Gas

Ammonia (NH3)

Operating Voltage

5V DC

Operating Current

150mA (typical)

Interface

Analog (AO) and Digital (DO) outputs

Sensitivity

10-1000 ppm NH3

Dimensions

32mm x 20mm x 22mm

Operating Temperature

-10°C to 50°C

Package Contents

1 x MQ-137 sensor module

FAQs

The MQ-137 module detects ammonia (NH3) gas concentration in the air, making it ideal for DIY air quality monitors, industrial leak detection, and smart home safety projects.

It operates on 5V DC and provides both analog and digital outputs. The analog output gives a variable voltage proportional to gas concentration, while the digital output triggers a high/low signal when a preset threshold is exceeded.

The package includes one MQ-137 sensor module and a set of header pins. Jumper wires and a microcontroller are not included and must be purchased separately.

Connect VCC to 5V, GND to ground, and the analog or digital output to your microcontroller's input pin. For accurate readings, allow a 24-hour burn-in period and calibrate the module in clean air using the onboard potentiometer.

Yes, we offer a 30-day return policy for defective or damaged units and a 12-month warranty against manufacturing defects. Contact our support team for assistance with returns or replacements.

Yes, the module is compatible with Arduino, Raspberry Pi, ESP32, and most microcontrollers that support 5V logic. For 3.3V boards, use a logic level converter or voltage divider on the output pin.