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Title: Realization Of ITS-90 From 273.15 K Through 1234.93 K: One Companys Approach
Author: Xumo Li, Steve Iman, Mike Hirst, Mingjian Zhao
Source: 1996 Measurement Science Conference
Year Published: 1996
Abstract: All of the fixed points of the International Temperature Scale of 1990 (ITS-90) in the range from 273.15 K to 1234.93 K have been realized in specially-designed, permanently- sealed cells. The purity of all of the metals used was 99.9999% or greater. Many improvements in design and techniques used were made in order to get the highest possible accuracy. Since it is important that all of the fixed points be traceable to NIST (National Institute of Standards and Technology), these fixed points were compared with NIST data by using two NIST-calibrated standard platinum resistance thermometers (SPRTs).

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