Dew point hygrometer with continuous balancing system

Details Dew point hygrometer with continuous balancing system Dew point hygrometer with continuous balancing system

1980-03-28

1982-08-24

Ruehl, Charles A.

Thermal measuring and testing

Transformation point determination

By change in optical property

G01N 2568

Patent

active

043454550

ABSTRACT:
A dew point hygrometer wherein separate reflective surfaces reflect light from separate light sources to a single light sensor. One surface is cooled to develop a coating of condensation. The other surface provides a standard to detect contamination build-up on both surfaces, and to detect variations in the operation of the single light sensor.

REFERENCES:
patent: 2624195 (1953-01-01), Van Alen
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patent: 3195344 (1965-07-01), Francisco
patent: 3195345 (1965-07-01), Thiele
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patent: 3269185 (1966-08-01), Francisco
patent: 3280618 (1966-10-01), Ballinger
patent: 3623356 (1971-11-01), Bisberg
patent: 4216669 (1980-08-01), Harding, Jr.

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