Process for keeping dustfree an apparatus for detecting impurity

Details Process for keeping dustfree an apparatus for detecting impurity Process for keeping dustfree an apparatus for detecting impurity

1990-03-30

1992-04-07

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356240, G01N 904

Patent

active

051030870

ABSTRACT:
A process and apparatus for detecting impurity particles in fluids, particularly in infusion solutions contained in bottles, with the apparatus including illuminating and etecting device for defining an optical path through which a fluid is conveyed along a fluid conveying path. To increase reliability of detection, pure air is blow from the optical path into a fluid conveying channel thereby ensuring freedom from dust. The conveying channel of the fluid in a vicinity of the illuminating and detecting device, in a direction of the optical path, has an opening, and a blower having a filter is located on the other side of the opening, as viewed in a direction of the conveying path.

REFERENCES:
patent: 3953136 (1976-04-01), Hach
patent: 4172524 (1979-10-01), Holm et al.
patent: 4349112 (1982-09-01), Wilkes
patent: 4385233 (1983-05-01), Lovalenti
patent: 4902137 (1990-02-01), Krieg et al.
patent: 4951825 (1990-08-01), Hawkin et al.

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