Sell air purifier with the help of handheld particle counter

Handheld particle counter is a small detector to test air quality. also called PM2.5 detector.
With this machine you can know the air quality around you before use the air purifier.
Then test again after use the air purifier.  this way your customer will know clearly of the function of air purifier.
It will the best machine to help you sell air purifier. also know the air quality.


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