Particle counter confirm indoor air quality standard

Standard indoor air also means that is the most suitable for human living environment.
Simple said that the indoor air is non-toxic, tasteless, colorless, no noise, no abnormal.
The main components in the air, including oxygen, formaldehyde, water vapor, particulate matter, etc.
Indoor air quality can be detected by using professional pollution detection tools particle counter.
Laser particle counter can check PM2.5 and Pm10 in the air. also the tempreature and humidity.