MQ 135 Air Quality/Gas Detector Sensor Module

The MQ-135 module provides both digital and analog outputs, making it compatible with microcontrollers like Arduino and Raspberry Pi. Operating Voltage: 5V DC (can range from 2.5V to 5V on some boards). Target Gases: It has a high sensitivity to a wide range of gases, including ammonia (NH₃), nitrogen oxides (NOx), alcohol, benzene, smoke, and **carbon dioxide (CO₂) ** (relative detection). Detection Range: Typically 10 to 1000 ppm (parts per million) for various gases.