
The MQ-135 Air Quality Gas Sensor Module is a versatile gas detection sensor designed to detect various harmful and pollutant gases in the air. It can be used for monitoring air quality, smoke, ammonia, benzene, alcohol, and other gases in residential, industrial, and environmental applications.
The sensor provides an analog output that can be connected to Arduino, ESP32, Raspberry Pi, and other microcontroller boards. It also commonly includes a digital output with adjustable sensitivity, making it easy to set a detection threshold.