A Single-Channel, Multipoint, Continuous, Liquid-Level System for Liquid Hydrogen, Using Carbon Resistors

  • R. M. Kocher
Conference paper
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 10)


A cryogenic point-sensor system for liquid hydrogen can be designed using the graphical data of Muhlenhaupt and Smelser [1]. The point sensor operates on the principle of resistor heat-transfer differences between gas and liquid and the large negative coefficient of the resistor in a cryogenic environment. Such a system sacrifices precise indication and fast time response, and generally uses one instrumentation channel per point sensor.


Liquid Level Liquid Hydrogen Test Cylinder Point Sensor Carbon Resistor 
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  1. 1.
    R. C. Muhlenhaupt and P. Smelser, “Carbon Resistors for Cryogenic Liquid-Level Measurement,” NBS Tech. Note No. 200 (October 1963).Google Scholar
  2. 2.
    “Radiation-Resistant Cryogenic Transducers for the Environment of Nuclear Vehicles,” Vol. 1, Bendix Aviation Corporation, Pioneer-Central Division, Davenport, Iowa.Google Scholar
  3. 3.
    “RIFT Cryogenics Fluid Flow, 40-Inch Tank Gross Flow Tests, Final Report,” Lockheed-Georgia Company, Report No. GR 6121, Marietta, Georgia.Google Scholar
  4. 4.
    D. A. Burgeson, W. G. Pestalozzi, and R. J. Richards, in Advances in Cryogenic Engineering, Vol. 9, Plenum Press, New York (1964), p. 416.Google Scholar

Copyright information

© Plenum Press, New York 1965

Authors and Affiliations

  • R. M. Kocher
    • 1
  1. 1.Lockheed Missiles and Space CompanySunnyvaleUSA

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