Method for determination of concentration

Details Method for determination of concentration Method for determination of concentration

1976-11-23

1978-08-29

Corbin, John K.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

250564, 250574, 356208, G01N 2126, G01N 3346

Patent

active

041100441

ABSTRACT:
The percentage of suspended substances in a flowing medium is indicated by illuminating said medium with light perpendicularly to the direction of flow. The light intensity is held mainly constant at a predetermined value. Detection is made by a first light detector of light radiated from the medium in a predetermined direction and the electrical signal obtained is led to a device squaring the effective value of the portion of said signal lying within a predetermined frequency range. The percentage of the suspended substance is obtained from said square of the effective value.

REFERENCES:
patent: 3724957 (1973-04-01), Tamate et al.
patent: 3858851 (1975-01-01), Ogle
patent: 3879129 (1975-04-01), Inoue

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