Relationship between handheld particle counter and air cleaner

Do you have air purifier in your home?  do you fell the important of it to human health?
Before you the air cleaner, you can use handheld particle counter to know the air quality.
After use the PM2.5 detector then use the air purifier to test air qualiy again.
You will find how much the air changed and how imporant of the air purifier.
So handheld particle counter like a helper for air purifier.


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reprinted: http://homehealthywater.com/health-care-knowledge/1590.html