Help air purifier to clean air with PM2.5 detector

PM2.5 detector is very hot selling in recent years because of the bad air quality.
Use the PM2.5 detector to test the air quality good or not.
Then you can use air purifier to clean the air after test again with handheld particel counter.
You can enjoy the healthy air again with your family and friends.
http://www.homehealthywater.com/
http://www.skin-analyzer.com/

http://www.ionaircleaner.com/