M200 PERSONAL ENVIRONMENTAL MONITORS (PEM™) are small, light-weight personal samplers comprised of a single-stage impactor followed by a 37 mm filter to collect particle samples from the ambient air. Impactor cut-size diameters of 2.5 µm and 10 µm are available for sampling at 2, 4, or 10 L/min for personal PM2.5 and PM10 sampling. The PEM can be operated with personal sampling pumps for personal PM2.5 and PM10 exposure studies.