Particle analyzing device with changeable aperture means

Electricity: measuring and testing – Determining nonelectric properties by measuring electric... – Erosion

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73432PS, G01B 2702, G01R 2700

Patent

active

039581772

ABSTRACT:
A particle analyzing device in which a suspension of particles in a fluid medium is passed through an aperture in a strip of plastic material, and the change in the conductivity of the suspension across the aperture, each time a particle flows through the aperture, is detected so that the number and volume of particles for a given quantity of the suspension can be determined. The strip can be provided with a plurality of scanning apertures and be selectively moved across the flow path to bring a new aperture into an operative position in the flow path, such as when an aperture becomes clogged by debris.

REFERENCES:
patent: 3475965 (1969-11-01), Koblin et al.
patent: 3485086 (1969-12-01), Roman
patent: 3614607 (1971-10-01), Schoen
patent: 3672507 (1972-06-01), Paull, Jr.
patent: 3815024 (1974-06-01), Bean et al.

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