Electrical Resistance Ratio of Chromel-P Wire between 4.2° and 600°K
The measurement and control of the temperature of experimental apparatus in cryogenic environments has been widely explored . Problems in such measurement and control by thermoelectric and thermal resistance effects are receiving constant attention. However, the application of Chromel-P vs. constantan thermocouples to cryogenic temperature measurement and control has not become widespread. The reason for this limited usage is not clear, especially since the sensitivity and potential [1, 2, 3] for this thermocouple system are higher than for the more popular copper vs. constantan thermocouple system. Furthermore, the use of low-thermal-conductivity Chromel-P  wire, instead of copper wire, would reduce heat leaks into cryogenic systems.
KeywordsResistance Ratio Electrical Resistance Ratio Thermal Expansion Data Constantan Thermocouple Residual Resistance Ratio
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- 1.R. J. Corruccini, in Advances in Cryogenic Engineerings Vol. 8, Plenum Press, New York (1963), p. 316.Google Scholar
- 2.W. T. Ziegler et al., “Cryogenic Phase of DOD Titanium Sheet Rolling Program. Part II. Thermal Conductivity of Titanium Alloys at Low Temperatures,” Final Report Projects Nos. A-504 and E-238, Engineering Experimental Station, Georgia Institute of Technology (1 June, 1960 to 16 January, 1962).Google Scholar
- 4.Hoskins Manufacturing Company, “Chromel-Alumel Thermocouple Alloys,” Catalog M-61 C-A 5M S.P. 6–61 (1961).Google Scholar
- 5.Hoskins Manufacturing Company, private communication (April 18, 1963).Google Scholar
- 6.K. D. Timmerhaus, in Applied Cryogenic Engineering, J. Wiley & Sons, New York (1962) p. 82. R. W. Vance and W. M. Duke (eds.).Google Scholar
- 8.H. Shenker, J. I. Lauritzen, Jr., R. J. Corruccini, and S. T. Lonberger, “Reference Tables for Thermocouples”, NBS Circ. 561 (April 27, 1955).Google Scholar