APM 550 Respirable Dust Sampler

The APM 550 system is a manual method for sampling fine particles (PM2.5 fraction) and is based on impactor designs standardized by USEPA for ambient air quality monitoring. Ambient air enters the APM 550 series samplers system through an omni-directional inlet designed to provide a clean aerodynamic cut-point for particles greater than 10 microns. Particles in the air stream finer than 10 microns proceed to a second impactor that has an aerodynamic cut-point at 2.5 microns. The air sample and fine particulates exiting from the PM 2.5 impactor are passed through a 47 mm diameter Teflon filter membrane that retains the fine particulate matter. The sampling rate of the system is held constant at 1 m3hr by a suitable critical orifice. The standard system is supplied with a Dry Gas Meter to provide a direct measure of the total air volume sampled.
Special features:
PM10 and PM2.5 Impactors of sampler based on designs standardized by US EPA
Two part cabinet ensures that temperature of PM 2.5 filter remains close to ambient temperature
Imported brush-less pump with a low noise
Lower sampling rate of 1m3hr reduces filter choking even in areas having high FPM levels
Critical Orifice maintains constant sampling rate of 1 m3hour
Compact and portable