Particle counter show you the purification rate after test

Particle counter is very famous in recent years because of the PM2.5 in the air.
It can also check the PM10 in the air, with the fast detection time 35 seconds.
Laser particle counter is the best laser sensor to get the air quality result.
Some team use to demo air purifier, and also can use in a lab.


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reprinted:  http://www.ionaircleaner.com/health_and_environment/2390.html