MQ-137 Ammonia Gas NH3 Sensor Module
VAT inclusive; Computed calculations added locally.
Overview
Monitor ammonia gas levels in your electronics and environmental monitoring projects with the MQ-137 Ammonia Gas NH3 Sensor Module. Built around the MQ-137 gas sensor, this module is designed to respond to ammonia (NH3) and can be integrated into a variety of gas detection and monitoring systems.
The module is suitable for use with popular microcontrollers such as Arduino, ESP32, and STM32. Its analog output can be read by an ADC for relative gas-level monitoring, while versions equipped with a comparator circuit may also provide a digital output with an adjustable detection threshold.
The MQ-137 sensor module is useful for educational experiments, environmental monitoring, agricultural applications, laboratory projects, and custom gas detection systems.
Get the MQ-137 Ammonia Gas Sensor Module from KathalTech for your next gas sensing, automation, or embedded electronics project.
Important: MQ-series sensors require proper warm-up, calibration, and environmental consideration. This module should not be relied upon as a certified life-safety or industrial safety device.
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Product Technical Information
Technical Details
The MQ-137 Ammonia Gas NH3 Sensor Module is an electronic gas sensing module designed for detecting the presence of ammonia gas in compatible monitoring applications. It is based on the MQ-137 semiconductor gas sensor and can be used in experimental and microcontroller-based gas detection systems.
The sensor works by changing its electrical characteristics in response to the surrounding gas environment. This change can be measured and processed by a compatible electronic circuit or microcontroller.
Many MQ-137 sensor modules provide an analog output, allowing a microcontroller to read changing sensor values through an ADC. Some module versions also include a comparator circuit and potentiometer for setting a threshold, enabling a digital output when the configured threshold is reached.
Key Features
- Based on the MQ-137 gas sensor
- Designed for ammonia (NH3) detection
- Semiconductor gas sensing technology
- Analog output for sensor value monitoring
- Digital output available on compatible module versions
- Adjustable threshold on comparator-based modules
- Compatible with Arduino and other microcontrollers
- Suitable for gas sensing experiments
- Useful for environmental and agricultural monitoring projects
Applications
- Ammonia gas monitoring projects
- Environmental monitoring
- Agricultural applications
- Smart farming projects
- Air quality experiments
- Laboratory and educational projects
- IoT monitoring systems
- Arduino gas detection projects
- ESP32 wireless monitoring systems
- Embedded sensor applications
Important Usage Notes
- MQ-series gas sensors require a warm-up period before readings become stable.
- Accurate gas concentration measurement requires proper calibration.
- Temperature, humidity, sensor age, and environmental conditions can affect readings.
- The sensor output should not automatically be interpreted as an accurate NH3 concentration without calibration and appropriate measurement methods.
- Check the module's operating voltage and output voltage before connecting it to a 3.3V microcontroller such as ESP32.
- This module is intended for development, educational, and monitoring projects and should not replace certified gas detection or life-safety equipment.
Frequently Asked Questions
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