Method and apparatus of detecting impurities in fluid

Details Method and apparatus of detecting impurities in fluid Method and apparatus of detecting impurities in fluid

1994-01-25

1996-02-27

Pham, Hoa Q.

Optics: measuring and testing

By particle light scattering

With photocell detection

356343, 250574, G01N 2100

Patent

active

054953332

ABSTRACT:
There is provided a method and apparatus of detecting minute impurities in the entire body of a fluid. Part of the passage through which the fluid flows is constituted by a transparent member. Light is emitted in a direction substantially parallel to the longitudinal axis of this part of the fluid passage so as to envelop the same. Light scattered by impurities in the fluid is observed from a direction substantially perpendicular to the direction of the passage to detect any minute impurities in the fluid. The method and apparatus is well-suited for use in systems which extrude molten resin in the formation of plastic products used in an electrical environment in order to detect impurities in the resin which could adversely affect the performance of the products.

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IBM Technical Disclosure Bulletin, vol. 28, No. 1, Jun. 1985, pp. 331-332.
Patent Abstracts of Japan, vol. 12, No. 8 (P-654) (2855) Jan. 12, 1988.

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