MQ135 Gas Sensor Air Quality Sensor uses low conductivity tin oxide (SnO2) in clean air. It comes with basic components to enable the sensor to function properly and hook up easily to any controller you prefer. When the sensor is kept in their environment, its conductivity increases with the air pollution in gas concentration increases.
For Arduino, connect DO to any digital pin (if you want it in digital input). Connect AO at analog pin (if you want it in analog input).
- Detection of gas: Ammonia /Sulfide/ Benzene vapor
- Detection of Concentration:10-1000ppm
- Input voltage: DC 5V
- Power consumption (current): 150mA
- AO output: 0.1-0.3V (relatively non-polluting), the highest concentration voltage is about 4V