Arduino – Optical Dust Sensor for Avr and Pic – STSX0044

These device is a commonly used in air purifier systems to detect very fine dust particles like smoke & very fine dust in air. It consists an infrared emitter and a phototransistor which are diagonally arranged to detect reflected light from dust. The sensor is very compact and has a very low current consumption. By using this module we can easily detect the presence of dust by the photometry of only one pulse. It can also distinguish smoke from house dust by pulse pattern of output voltage.