any instrument used to measure the size and number of dust particles per unit volume in the atmosphere.
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Origin of dust counter
First recorded in 1890–95
Also called nucleus counter.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for dust counter
It is not nearly so accurate as the dust-counter; but it is cheaper, more easily wrought, and more handy for quick work.Meteorology|J. G. M'Pherson