The V-Air 9009 (CAAQMS) from Vasthi Instruments uses beta attenuation monitoring technology to accurately monitor PM 10 and PM 2.5 (CAAQMS) pollutants. For more information, contact vasthi.com!.Particles with diameters of 10 micrometers or smaller.Source: PM10 includes a variety of particles from different sources, such as dust from roads and construction sites, agricultural activities, and industrial processes.Health Impact: PM10 can penetrate into the respiratory system and may cause health problems, especially for people with respiratory conditions.