MQ-137 Ammonia NH3 Gas Sensor Module is a gas detection sensor designed for monitoring Ammonia (NH₃) concentration in air. Built around the original MQ-137 sensing element, this module utilizes SnO₂ semiconductor technology to detect changes in gas concentration through conductivity variation. Suitable for air quality monitoring, industrial safety projects, laboratory experiments, environmental monitoring systems, IoT applications, Arduino projects, Raspberry Pi projects, ESP32 development, and embedded system gas detection applications. BDTronics supplies MQ-137 Ammonia Gas Sensor Module for students, engineers, researchers, automation projects, and industrial monitoring applications in Bangladesh.

Features:

• Detects Ammonia (NH₃) gas concentration in air

• Sensitive semiconductor SnO₂ sensing material

• Fast response to Ammonia gas presence

• Suitable for gas leakage detection systems

• Supports analog signal output for concentration monitoring

• Compatible with Arduino, ESP32, ESP8266, Raspberry Pi, STM32, PIC, AVR, and other microcontrollers

• Operates from standard 5V DC supply

• Compact module design for easy integration

• Useful for industrial gas monitoring projects

• Suitable for environmental monitoring systems

• Supports custom calibration for improved measurement accuracy

• Easy interface with development boards and embedded systems

• Reliable gas sensing performance

• Low-cost solution for NH3 gas detection applications

Applications:

• Ammonia gas detection systems

• Industrial safety monitoring

• Air quality monitoring projects

• Smart agriculture systems

• Poultry farm monitoring

• Livestock environment monitoring

• Chemical laboratory projects

• Industrial automation systems

• Environmental monitoring stations

• IoT gas sensing devices

• Arduino gas detection projects

• Raspberry Pi sensor projects

• ESP32 monitoring systems

• Research and educational projects

• Smart factory monitoring solutions

How It Works:

• MQ-137 sensor uses SnO₂ semiconductor material as the sensing element.

• In clean air, sensor conductivity remains relatively low.

• When Ammonia (NH₃) gas is present, conductivity increases.

• Higher gas concentration causes greater conductivity changes.

• The module converts these conductivity changes into measurable electrical signals.

• Microcontrollers can read the output and estimate gas concentration after calibration.

How to Use:

• Connect VCC pin to 5V power supply.

• Connect GND pin to system ground.

• Connect output pin to an analog input of Arduino, ESP32, STM32, Raspberry Pi ADC module, or other controller.

• Power the module and allow warm-up time for stable readings.

• Read sensor output values through software.

• Perform calibration according to application requirements.

• Monitor gas concentration changes based on output readings.

Product Instructions:

• Use a stable 5V power source.

• Allow sensor preheating before taking measurements.

• Calibrate sensor for accurate concentration estimation.

• Install in a location with adequate airflow.

• Avoid exposure to excessive moisture or water.

• Periodically check sensor performance for long-term applications.

• Suitable for indoor gas monitoring and research projects.

Specifications:

• Sensor Model: MQ-137

• Main Chip: MQ-137

• Gas Type Detection: Ammonia (NH₃)

• Additional Sensitivity: Carbon Monoxide (CO)

• Sensing Material: SnO₂ Semiconductor

• Operating Voltage: 5V DC

• Detection Range: 10ppm – 300ppm

• Output Type: Analog Signal

• Application Type: Gas Detection and Monitoring

• Module Type: Ammonia Gas Sensor Module

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