Vathi Instruments PM10 and PM2.5 Monitor VDPM - 6000 for AAQMS purpose, Real - Time Portable Beta Attenuation Mass Monitor, continuously measures the mass concentration of ambient particulate matter(PM10 & PM2.5) collected onto glass filter tape with time resolu-tion of one-minute. The PM10 and PM2.5 Monitor VDPM-6000 employs an in-line sampling geometry in which the attenuation of beta rays...