MQ135 Gas Sensor Module
Product Details
The MQ135 Gas Sensor Module is a popular sensor used for air quality monitoring and detection of harmful gases. It is capable of detecting gases such as ammonia (NH3), nitrogen oxides (NOx), alcohol, benzene, smoke, and carbon dioxide (CO2), making it suitable for environmental monitoring and pollution detection systems.
The sensor operates using a semiconductor gas sensing material that changes its electrical resistance when exposed to different gases. These changes are converted into analog and digital output signals, which can be easily processed by microcontrollers such as Arduino, Raspberry Pi, ESP8266, and ESP32.
The MQ135 module usually includes an onboard comparator circuit and adjustable potentiometer, allowing users to adjust the sensitivity and gas detection threshold according to their application. Due to its high sensitivity and stable performance, it is commonly used in indoor air quality monitoring systems, smart home automation, and IoT projects.
⚙️ Key Features:
Detects NH3, NOx, alcohol, benzene, smoke, and CO2
Provides analog and digital output signals
Adjustable sensitivity using onboard potentiometer
Fast response and reliable performance
Compatible with Arduino, Raspberry Pi, ESP32, and other microcontrollers
🔧 Common Applications:
Air quality monitoring systems
Pollution detection devices
Smart home environmental monitoring
IoT and embedded electronics projects
Industrial air safety monitoring
Educational robotics and sensor experiments
