MQ-135 Air Quality Gas Sensor pic It can easily be interfaced

It can easily be interfaced with any Microcontroller that has ADC function or any development platform like Arduino

4 point-to-point/multipoint

The sensor’s output is an analog resistance

4KB ISP Flash program memory

MQ-135 Air Quality Gas Sensor pic It can easily be interfacedMQ135 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