Table of Differences

At the CCT’s request, Working Group 4 (WG4) critically reviewed all available measurements of T T90 including constant-volume gas thermometry, acoustic gas thermometry, spectral radiation thermometry, total radiation thermometry, noise thermometry, and dielectric-constant gas thermometry. Consensus estimates are provided for T – T90, for selected measurements from 4.2 K to 1358 K, as well as a recommendation for analytic approximations to T T90 for the range 0.65 K to 1358 K