NIST, National Institute of Standards and Technology, U.S. Department of Commerce
NIST Temperature Scale Database (SRD 60), Version 3.0

Fixed Points Associated with a Selected Reference:

Temperature Scale Points
All Fixed Points

Reference:

Ortiz Vega, D. , Hall, K. , Holste, J. , Harvey, A. and Lemmon, E., An Equation of State for the Thermodynamic Properties of Helium, NIST Internal Report (NISTIR) 8474, National Institute of Standards and Technology, Gaithersburg, MD, 2023. (DOI:) (2023)

Instruction:Total Records:   2
Substance
 
Transition
 
T90 (K)
 
u(T90)
(mK)
 
T-T90
(mK)
 
u(T-T90)
(mK)
 
u(T90) (K)
 
Eval
 
HeBP4.22380.00010.0001
4HeSF2.17680.00080.0008