The MQ135 Air Quality Gas sensor is used in air quality control equipment and is suitable for detecting or measuring the level of NH3, NOx, Alcohol, Benzene, Smoke, CO2 in the air.
The MQ 135 Air Quality Detector Sensor Module For Arduino is a device that measures the conductivity of the air. The conductivity is low when the air is clean, and high when the air contains combustible gases.
The device can convert the conductivity changes into output signals that indicate the gas concentration levels. The MQ135 gas sensor is especially sensitive to Ammonia, Sulphide, and Benzene steam, as well as smoke and other harmful gases.
This sensor is low-cost and suitable for various applications that require harmful gases/smoke detection.