What is air pollution relationship with particle counter

What is air pollution index?Air pollution index (API) is to regular monitoring of several kinds of air pollutant
concentration is simplified into a single conceptual index value form, and characterization of air pollution
and air quality condition, suitable for said the short-term air quality status and changing trend of the city.
According to the characteristics of air pollution in China, and pollution prevention and control of a key,
now included in the air pollution index of the tentative program for the sulfur dioxide, nitrogen oxides
and particulate matter, or the total suspended particulate matter.Along with the development of
environmental protection work and the improvement of monitoring technology,
will be adjusted to increase other pollution projects, in order to more objectively reflect the pollution condition.

Lanjia handheld particle counter just need 35 s sampling can know the air quality is good or bad.