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Construction and performance of a modified Wide Range Aerosol Classifier (WRAC)

: Dunkhorst, W.; Holländer, W.; Pohlmann, G.

Gesellschaft für Aerosolforschung -GAF-, Schmallenberg; American Association for Aerosol Research:
Aerosols: Formation and Reactivity. Proceedings of the 2nd International Aerosol Conference
Oxford: Pergamon Press, 1986 (Proceedings of the International Aerosol Conference 2)
International Aerosol Conference <2, 1986, Berlin/West>
Fraunhofer ITA ( ITEM) ()
aerosol; impactor; reference sampler; wide range aerosol classifier; WRAC

In order to compare dust samplers of different design, a reference instrument is needed capable of measuring large particles at high wind speeds. Based on a design by Lundgren, the instrument was improved by the following modifications: oil impregnated impaction plates from sintered metal, automatic mass flow control and hyperbolic inlets. The cutoff diameters are 9.2, 20.4, 37.4 and 60.2 micrometers. (ITA)