MQ135 – Air Quality Gas Sensor Module
The MQ135 Air Quality Gas Sensor Module is a highly sensitive gas detection sensor widely used for monitoring indoor air quality and harmful gases in the environment. This module can detect gases such as ammonia, alcohol, benzene, smoke, carbon dioxide, and other harmful pollutants present in the air. It is an ideal solution for air quality monitoring systems, smart homes, industrial safety applications, and IoT-based environmental monitoring projects.
The MQ135 sensor module provides both analog and digital outputs, making it easy to interface with microcontrollers such as Arduino, ESP32, NodeMCU, Raspberry Pi, and other embedded systems. Due to its high sensitivity and fast response time, the sensor is commonly used in smart automation and environmental monitoring projects.
At RoboCircuitHub, we provide high-quality electronic modules and embedded development components suitable for students, hobbyists, engineers, and industrial developers. The MQ135 module is beginner-friendly and can be easily integrated into educational and professional projects.
This sensor operates using a heating element and chemical sensing layer that changes resistance according to gas concentration in the environment. The onboard potentiometer allows users to adjust the sensitivity threshold for accurate detection.
The MQ135 Air Quality Sensor Module is widely used in smart city systems, pollution monitoring stations, industrial gas leakage detection systems, air purifiers, and IoT-based smart monitoring devices. With easy connectivity and reliable performance, it is one of the most popular gas sensors for embedded and automation applications.
Specifications
- Model: MQ135 Gas Sensor Module
- Operating Voltage: 5V DC
- Output Type: Analog and Digital
- Detectable Gases: NH3, NOx, alcohol, benzene, smoke, CO2, and harmful gases
- High sensitivity and fast response time
- Adjustable sensitivity using onboard potentiometer
- LED indication for power and output status
- Compatible with Arduino, ESP32, Raspberry Pi, NodeMCU, and AVR boards
- Easy interfacing with embedded systems
- Compact and lightweight design
- Suitable for IoT and environmental monitoring applications
Applications
- Air quality monitoring systems
- Smart home automation
- Pollution monitoring projects
- Industrial safety systems
- Gas leakage detection
- IoT environmental monitoring
- Smart city applications
- Educational electronics projects
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