Very high volume aerosol sampling with a novel drum centrifuge

A self ventilating aerosol sampler was developed with a flow rate of 1200 cubic meters/hr at 300 rpm. Sampling efficiencies ranged from 91% for 2.1 mym particles, 75% for 0.6 mym particles to 48% for 0,04 mym particles. Theoretical calculations of sampling efficiency agree reasonably well with the experiments. (ITA)