Phase transition detector

Details Phase transition detector Phase transition detector

1976-09-28

1978-04-11

Goldstein, Herbert

Measuring and testing

Gas content of a liquid or a solid

By vibration

G01N 2568

Patent

active

040832244

ABSTRACT:
A dewpoint detector has a mirror which clouds over when condensation forms on it and this is detected by attenuation of a light beam reflected from the mirror. The precise temperature of the mirror is ascertained by a thermister which is buried just beneath the mirror surface and has its leads bonded to the mirror which provides a heat sink. Cooling of the mirror is effected by Peltier cooling. The detector can be used to determine freezing points accurately, as well as dewpoints.

REFERENCES:
patent: 3319457 (1967-05-01), Leone
patent: 3416356 (1968-12-01), Bridgeman
patent: 3623356 (1971-11-01), Bisberg

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