Sensors for low temperature application

Details Sensors for low temperature application Sensors for low temperature application

1974-10-04

1977-06-14

Goldstein, Herbert

Measuring and testing

Gas analysis

Moisture content or vapor pressure

1161145, G01K 1102

Patent

active

040289419

ABSTRACT:
A method and apparatus for low temperature sensing which uses gas filled micro-size hollow glass spheres that are exposed in a confined observation area to a low temperature range (Kelvin) and observed microscopically to determine change of state, i.e., change from gaseous state of the contained gas to condensed state. By suitable indicia and classification of the spheres in the observation area, the temperature can be determined very accurately.

REFERENCES:
patent: 3047405 (1962-07-01), Lanier
patent: 3107529 (1963-10-01), Johnston
patent: 3513313 (1970-05-01), Schwartz
patent: 3631720 (1972-01-01), Weinstein et al.
patent: 3701282 (1972-10-01), Peterson
patent: 3817204 (1974-06-01), Schitten
patent: 3818614 (1974-06-01), Meurer

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