The Cascade Centripeter: A Device for Determining the Concentration and Size Distribution of Aerosols
- 1 March 1965
- journal article
- research article
- Published by Taylor & Francis in Aihaj Journal
- Vol. 26 (2) , 122-131
- https://doi.org/10.1080/00028896509342711
Abstract
This paper describes the application of a new principle for the continuous size separation of airborne particles in which the coarser fraction of the dust is concentrated in the center of an air stream converging through an orifice, and is removed by a coaxial nozzle downstream. The design and calibration of a prototype instrument is described. This device consists of a tube about 1 1/2 inches in diameter and 7 inches long, in which air cascades through a series of orifices of diminishing diameter, and successively finer fractions of the dust are collected on a series of filter papers. The instrument has been calibrated with monodisperse methylene blue particles, and the size ranges of the particles collected on the four stages were found to be greater than 12 microns, 12 microns to 3.5 microns, 3.5 microns to 1.2 microns and less than 1.2 microns.Keywords
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