Determination of concentration of suspended substances

Details Determination of concentration of suspended substances Determination of concentration of suspended substances

G - Physics

01

N

73/59

G01N 21/01 (2006.01) G01N 21/53 (2006.01)

Patent

CA 1074147

A B S T R A C T 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 predeter- mined 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 substances is obtained from said square of the effective value.

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