Paritcle counter new version show the purification rate

In today's society, air pollution become more and more serious.
A lot of children easy to cough is because of the indoor air contains too much PM2.5.
Particle counter is the best machine to check air quality around us.
It is show with the PM2.5 and PM10 result also the temperature and humidity.
The latest version laser particle counter with the purification rate function.


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