Apparatus for measuring particles in a fluid

Details Apparatus for measuring particles in a fluid Apparatus for measuring particles in a fluid

Filed on

1987-06-08

Date issued

1988-11-29

Examiner

Westin, Edward P.

Patent Class

Radiant energy

SubClass

Photocells; circuits and apparatus

SubSubClass

Optical or pre-photocell system

Other Related Categories

2502222, 356336, 356338, 738655, G01N 1502, G01D 536

Type

Patent

Status

active

Patent number

047884436

Description

ABSTRACT:
An apparatus for measuring particles in a fluid comprises a laser source for producing a laser beam which is projected onto the fluid containing the particles. Laser light scattered by the particles is converted into an electrical signal consisting of pulses corresponding to the particles to be measured. The pulses are counted by first and second counters and processed in a processor to derive therefrom the diameter and/or concentration of the particles. The first and second counters are alternately operated for pulse counting and inhibited from pulse counting. Each counter transfers its count to the processor during the period that it is inhibited from counting.

REFERENCES:
patent: 4035080 (1977-07-01), Yamaguchi
patent: 4521521 (1985-06-01), Abbott et al.
patent: 4676641 (1987-06-01), Bott

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