Apparatus for measuring foreign substance content in a flowing l

Optics: measuring and testing – By shade or color – Fluid color transmission examination

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250576, 356435, 356440, G01N 2111, G01N 2115

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active

049001523

ABSTRACT:
In an apparatus for determining the concentration of foreign matter in a water stream, a stream of liquid is bypassed through conduits both before and after the pipeline block for the process and each stream is pumped into a cell, a beam source being associated with each of the cells whose beams penetrate the cells and are led by a beam splitter both to a first detector and to a second detector, the electrical signals of the detectors being compared by an electrical circuit and processed to a recognition signal. To make a bubble-free sample stream possible, magnetically actuated valves are inserted into the return lines which are connected to the cells, and the signals for opening and closing the valves are produced by a frequency generator.

REFERENCES:
patent: 4303337 (1981-12-01), James et al.
patent: 4608159 (1986-08-01), Collins, Jr.
Patent Abstracts of Japan (M-78) (4590); JP-A-5310 7578 (Hita Chi Salsakusho), 19.9.1978.
Burrows, "Application of IR and UV Analyzers to On Stream Analysis", Advances in Instrumentation, Oct. 1985, Research Triangle Park, N.C., U.S.A., pp. 1357-1385.

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