Thermally-Coupled Cryogenic Pressure Sensing

  • David L. Clark
Part of the Applications of Cryogenic Technology book series (APCT, volume 10)

Abstract

Improved methods for measuring low pressures in cryogenic systems are described. Pressure transducers and associated sensing lines are thermally coupled to the cryogen to eliminate thermo-acoustic-oscillations (TAO) caused by thermal gradients between the flow line and the transducer. The applications include flow and density measurement, and vapor bubble detection. Fully immersed and externally mounted transducers are used in these methods to reduce heat leak and measurement uncertainty. Implementation considerations are discussed, including transducer selection and temperature compensation.

Keywords

Flow Line Temperature Compensation Slug Flow Superfluid Helium Heat Leak 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    P. L. Walstrom and J. R. Maddox, Use of Siemens KPY Pressure Transducers at Liquid Helium Temperatures, Cryogenics, 27: 439 (1987).CrossRefGoogle Scholar
  2. 2.
    A. Kashani, A. L. Spivak, R. A. Wilcox and C. E. Woodhouse, Performance of Validyne Pressure Transducers in Liquid Helium, Proc. 12th Int. Cryo. Eng, Conf., Southhampton, U.K. (1988)Google Scholar
  3. 3.
    C. Boyd, D. Juanarena and M. G. Rao, Cryogenic Pressure Sensor Calibration Facility, in; Advances In Cryogenic Engineering, Vol. 35, R.W.Fast,ed., Plenum Publishing Corp., New York (1990), pp 1573–1581Google Scholar

Copyright information

© Springer Science+Business Media New York 1991

Authors and Affiliations

  • David L. Clark
    • 1
  1. 1.Martin Marietta Astronautics GroupDenverUSA

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