Resistive level sensor for cryo-liquid gas tanks

Details Resistive level sensor for cryo-liquid gas tanks Resistive level sensor for cryo-liquid gas tanks

2006-06-20

2006-06-20

Williams, Hezron (Department: 2856)

Measuring and testing

Liquid level or depth gauge

Thermal type

C073S30400R

Reexamination Certificate

active

07062965

ABSTRACT:
The present invention provides a probe having a resistance that varies with temperature and is operable to determine the quantity of a fluid, such as hydrogen, in a storage tank, such as a cryogenic storage tank. The probe relies upon differing heat transfer rates for the gaseous and liquid phases of the fluid and a change in resistance due to a change in temperature of the probe to ascertain the quantity of fluid within the storage tank. The probe can be configured to account for the geometry of the storage tank thereby providing a linearized signal indicative of the quantity of fluid in the storage tank.

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Lake Shore Cryotronics, Inc., re: Product Overview—Description and Features, www.lakeshore.com/temp/sen/prtd.html, downloaded Feb. 26, 2004 (2 pages).
Lake Shore Cryotronics, Inc., re: Product Overview (other information) www.lakeshore.com/temp/sen/prtdm.html, downloaded Feb. 26, 2004 (3 pages).
Lake Shore Cryotronics, Inc., re: Tech Specs, www.lakeshore.com/temp/sen/prtdts.html, downloaded Feb. 26, 2004 (3 pages).
Lake Shore Cryotronics, Inc., re: Sensor Packaging, www.lakeshore.com/temp/sen/pack.html, downloaded Feb. 26, 2004 (10 pages).

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