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Record Details

Record 8 of 154097
Reference data for thermocouple materials below the ice point.
Author and Affiliation:
Sparks, L. L.
Powell, R. L.(National Bureau of Standards, Institute for Basic Standards, Boulder, Colo., United States)
Abstract: Standard thermoelectric data have been determined for four thermocouple combinations used below the ice point: commercial types E, K, and T and the special combination of KP vs Au-0.07 at.% Fe. Power series coefficients necessary to generate E = f(T) data for these combinations are given. In addition, extensive tests were carried out to ascertain the variability between materials from different manufacturers. Typical wires processed for low-temperature usage often have slightly thermoelectric properties (up to 1%) from those, nominally identical, wires made for high-temperature applications. Generally, type E is the most satisfactory standardized commercial combination. The Au-0.07 at.% Fe material has been examined in particular detail, because it is not yet an ISA standard material. It has excellent sensitivity in the liquid helium/liquid hydrogen temperature range and a nearly linear thermovoltage at higher temperatures.
Publication Date: Jan 01, 1972
Document ID:
19730057229
(Acquired Dec 04, 1995)
Accession Number: 73A42031
Subject Category: INSTRUMENTATION AND PHOTOGRAPHY
Document Type: Conference Proceedings
Publication Information: (SEE A73-41976 22-14)
Publisher Information: United States
Meeting Information: Symposium on Temperature; 5th; June 21-24, 1971; Washington, DC
Contract/Grant/Task Num: NASA ORDER R-45
Financial Sponsor: NASA; United States
Description: 9p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CRYOGENIC EQUIPMENT; GOLD ALLOYS; IRON ALLOYS; MATERIALS SCIENCE; THERMOCOUPLE PYROMETERS; THERMOELECTRIC MATERIALS; CRYOSTATS; ELECTRIC WIRE; LIQUID HELIUM; LIQUID HYDROGEN; TEMPERATURE EFFECTS; THERMOPILES
Imprint And Other Notes: In: Symposium on Temperature, 5th, Washington, D.C., June 21-24, 1971, Proceedings. Part 3. (A73-41976 22-14) Pittsburgh, Instrument Society of America, 1972, p. 1569-1577. NASA-supported research
Availability Source: Other Sources
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