Particle counter analysis air quality

Different with different level on the PM2.5 request.
Do you know your air quality in your home? your family in a good breath?
Particle counter is the best machine to help you check this.
With handheld particle counter to know PM2.5 in the air.
Also can demo the air purifier works or not .

www.homehealthywater.com
www.skin-analyzer.com
www.ionaircleaner.com