MQ-135 Air Quality Hazardous Gas Sensor Module for Arduino

This sensor module detects various indoor pollutants like ammonia, nitrogen oxides, alcohol, benzene, smoke, and CO2 using a SnO2 sensing layer. It offers analog and digital outputs and requires calibration and an initial burn-in period.

• The sensor module can detect ammonia, nitrogen oxides, alcohol, benzene, smoke, and CO2.
• It requires an initial 24-hour burn-in period to stabilize readings.