which organs will damage by the fine particulate matters

Long term exposure to particles can lead to cardiovascular and respiratory diseases and lung cancer.
When the concentration of PM2.5 in the air was higher than 10
will lead to a rise in the risk of death. Concentration increased by 10, the total mortality risk rose 4%.
The risk of death from heart and lung disease increased by 6% and the risk of death from lung cancer increased by 8%.
So we use the particle counter to check the air quality around us.
Use the laser particle counter can also demo the air purifier really work or not.