3 ms·
It counts pollution particles in the air by highlighting them with a ray of laser light and counting the reflections. Air cleaners usually come with a device of
by pkolaczk 2y ago
It counts pollution particles in the air by highlighting them with a ray of laser light and counting the reflections. Air cleaners usually come with a device of this kind. Or you can build one yourself by buying the sensor separately (eg. PMS7003) and attaching it to a microcontroller.