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SRM 1967a: High-Purity Platinum Thermoelement



Karen M. Garrity, Weston L. Tew, Dean C. Ripple


Consisting of a 1 m long piece of 0.5 mm diameter platinum wire, SRM 1967a meets the requirements for a thermoelectric reference material for temperatures from 196 °C up to approximately 1700 °C. We have tested the thermoelectric emf of four SRM 1967a cuts versus four cuts from the prior reference standard SRM 1967 (Pt-67) lot. The tests indicate that SRM 1967a differs from SRM 1967 by less than 0.7 µV throughout its temperature range. The thermoelectric homogeneities of both lots are comparable and quite small, resulting in a standard thermoelectric material that replicates the average of the Pt-67 response to within 0.25 µV up to 250 °C and rising to 0.7 µV at 1700 °C, all at 95 % confidence.
Special Publication (NIST SP) - 260-183
Report Number


platinum, Standard Reference Material, thermocouple, thermoelectric material, thermal emf


Garrity, K. , Tew, W. and Ripple, D. (2016), SRM 1967a: High-Purity Platinum Thermoelement, Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed June 15, 2024)


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Created March 9, 2016, Updated November 10, 2018