Particle counter to check the PM2.5 indoor

Particle counter to check PM2.5 and PM10 in the air around us.
Fine particulate matters can easy go inside human body with breath.
So we need to clean it and let we live in a healthy place.
It can not only the PM2.5 and PM10. also can check the particulates under 0.3μm and 2.5μm.
Some team use it to check air purifier function and capability.