Air Particle counter check both particulates quantity and weight

Fine particulate matters is means PM2.5, it can go inside human body lung with breath.
With the particle counter you can check the PM2.5 and PM10 in the air.
Also you can check the fine particulate matters quantity too with the laser particle counter.
Like the 0.3μm and 2.5μm. It is quantity of the particulates.
After test the result we can use the air purifier and other way to change the air we breath.

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reprinted: http://www.ionaircleaner.com/health_and_environment/2298.html