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 Reasonable Price refer to particulate matter with diameters of 10 micrometers and 2.5 micrometers, respectively. These particles are a type of air pollutant and can come from various sources such as combustion processes, industrial emissions, and natural sources. Call now us : 7382708685