MQ135 Air Quality Gas Sensor Module | MQ135 Smoke Sensor

MQ135 Air Quality Sensor Module is built using the MQ135 gas sensor, a cost-effective semiconductor sensor with high sensitivity to ammonia, sulfide, benzene vapors, smoke, and other toxic gases.

As a Metal Oxide Semiconductor (MOS) sensor, also known as a chemiresistor, it detects gases by changing its resistance when exposed to them. A simple voltage divider network enables the measurement of gas concentrations.

This module offers both digital and analog outputs, making it easy to interface with microcontrollers, Arduino boards, Raspberry Pi, and other development platforms.