Tell you the different between PM2.5 and PM10

PM2.5 means the little particle in the air, which diameter little then 2.5um.
And PM10 means the particle whichdiameter under 10um.



With particle counter can test the air quality and also the particle sensor help you more healthy. 
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The article is provide from [Lanjia Water Ionizer], please indicate the source address
reprinted:
Both PM2.5 and PM10 can not seen by air but can go inside body through breath.