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!. We are providing best PM10 and PM2.5 refer to particulate matter in the air, specifically particles with aerodynamic diameters less than 10 micrometers (µm) and 2.5 micrometers, respectively. These particles can originate from various sources, including vehicle emissions, industrial processes, construction activities, and natural sources such as wildfires and dust storms. Call now us : 7382708685