Burns, G.
, Ripple, D.
and Battuello, M.
(1998),
Platinum Versus Palladium Thermocouples: an EMF-Temperature Reference Function for the Range 0 degrees {Celsius} to 1500 degrees {Celsius}, Metrologia, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=830597
(Accessed October 7, 2025)
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Platinum Versus Palladium Thermocouples: an EMF-Temperature Reference Function for the Range 0 degrees {Celsius} to 1500 degrees {Celsius}
Published
Author(s)
, , M Battuello
Abstract
We present an emf-temperature reference function for platinum versus palladium (Pt/Pd) thermocouples in air for the range 0 degrees {Celsius} to 1500 degrees {Celsius}. The reference function is based on the International Temperature Scale of 1990 (ITS-90) and has an expanded uncertainty (coverage factor of two) of less than the equivalent of 11 mK for temperatures up to 1050 degrees {Celsius} and rising smoothly to about 0.3 K at 1500 degrees {Celsius}. The reference function is based on a set of Pt/Pd thermocouples of exceptional stability and homogeneity constructed from Pt and Pd wire of very high purity (99.999% mass fraction and 99.997% mass fraction respectively). Experimental results are presented on the thermoelectric stability of Pt/Pd thermocouples at high temperatures and on the calibration of Pt/Pd thermocouples based on this reference function.Citation
Metrologia
Volume
35
Issue
5
Pub Type
Journals
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Keywords
high temperature, palladium, platinum, reference function, thermocouple
Citation
Issues
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Created October 1, 1998, Updated February 19, 2017