Keyestudio Dust sensor with Sharp GP2Y1014AU onboard works well in detecting very fine particle larger than 0.8μm in diameter, even like the cigarette smoke.
It also has an IR LED and photoeletric transistor. Arranging them with across corners can detect the reflected light of dust in the air.
Ultra-low power consumption(max at 20mA, typical at 11mA), analog voltage output is liner with dust density. It can be equipped with sensors up to 7V DC. The sensitivity is 0.5V/(0.1mg/m3).
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