Device for determining surface moisture

Details Device for determining surface moisture Device for determining surface moisture

1988-10-13

1990-05-08

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250577, 250903, G01N 2149

Patent

active

049240846

ABSTRACT:
A device for determining surface moisture, especially of absorbent materials, comprises a Dove reflection prism, a radiation source of such a design that its beams, which are aligned parallel, perpendicularly strike one of the two small surfaces of the prism, a light trap which traps the light beams emanating from the other small surface, and a photoelectric transducer which is located in the angle formed by the two small surfaces and is arranged such that its measurement surface is located parallel and opposite to the hypotenuse surface of the prism.

REFERENCES:
patent: 3120125 (1964-02-01), Vasel
patent: 3487069 (1969-12-01), Maselli
patent: 3882887 (1975-05-01), Rekai
patent: 4699516 (1987-10-01), Bartz et al.
patent: 4788444 (1988-11-01), Williams

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