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dust counter

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noun
  1. 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. 2018

Examples from the Web for dust counter

Historical Examples

  • 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