Dust detection

Details Dust detection Dust detection

1986-07-22

1988-04-26

Prunner, Kathleen J.

Gas separation

With nonliquid cleaning means for separating media

Solid agent cleaning member movingly contacts apparatus

55325, 55332, 55439, 55446, 7386322, B01D 5000

Patent

active

047402202

ABSTRACT:
A personal dust spectrometer for aerodynamically classifying and collecting sub-fractions of inspirable dust, has an entry which has an entry efficiency approximating that of the human head during inhalation, and a cascade impactor comprising a stack of stages each having a flat element and a peripheral wall and gas exit holes. A connector enables a gas sampling pump to be attached to draw air through the entry and through the cascade impactor. A filter is desirably used to collect the smallest dust particles. All the dust entering the device is collected and is measurable.

REFERENCES:
patent: 3693457 (1972-09-01), Pilat
patent: 3795135 (1974-03-01), Andersen
patent: 3953182 (1976-04-01), Roth
patent: 3983743 (1976-10-01), Olin et al.
patent: 4189937 (1980-02-01), Nelson
patent: 4327594 (1982-05-01), Nelson

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