Method and apparatus for measuring specific gravity of a flowing

Details Method and apparatus for measuring specific gravity of a flowing Method and apparatus for measuring specific gravity of a flowing

1985-08-01

1989-05-30

Howell, Kyle L.

Surgery

Truss

Pad

128771, 73 32R, 356136, A61B 500

Patent

active

048341045

ABSTRACT:
A method and apparatus for continually measuring the specific gravity of a flow liquid. The liquid is caused to flow across a flat measurement surface defined by a light transmissive shelf member. The measurement surface, i.e. the interface between the shelf member and liquid sample thereon, is illuminated by rays incident at angles greater than and less than a critical angle to reflect a boundary line whose position is dependent on the critical angle and thus the specific gravity of the liquid sample. The reflected boundary line is projected onto a photovoltaic surface which, together with detector electronics, determines the position of the boundary line with respect to a boundary line position associated with a reference liquid. The difference in boundary line position is used by the detector electronics to determine the specific gravity of the sample by a table lookup procedure.

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