Thermometer for measuring cryogenic temperatures

Details Thermometer for measuring cryogenic temperatures Thermometer for measuring cryogenic temperatures

1984-05-17

1985-12-24

Frankfort, Charles

Thermal measuring and testing

Temperature measurement

Mechanical

374203, 374176, G01K 500

Patent

active

045602883

ABSTRACT:
A thermometer comprises a first sample space having a liquefiable gas sealed therein and a second sample space partitioned from the first sample space by a pressure difference detecting element and having a liquefiable gas sealed therein in conjunction with an adsorbent. As this thermometer is cooled to cryogenic temperatures, the second sample space is vacuumized by the action of the adsorbent. As the pressure difference detected by pressure difference detecting element at this is equal to the vapor pressure in the first sample space, the temperature can be accurately measured from the detected pressure difference.

REFERENCES:
patent: 3064245 (1962-11-01), Lindberg
patent: 3308646 (1967-03-01), Singleton
patent: 3436713 (1969-04-01), Noia
patent: 3555483 (1971-01-01), Tener
patent: 3625059 (1971-12-01), Camus et al.
patent: 3992944 (1976-11-01), Woodle

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