NIST Temperature Scale Database (SRD 60), Version 3.0

ITS-90 Primary Fixed Points:

Temperature Scale Points
Primary Fixed Points

International Temperature Scale Primary Fixed Points

We provide the primary (defined) fixed points on the International Temperature Scale of 1990 (ITS-90) along with uncertainties. We provide the primary references for all primary fixed points. In addition, to this primary reference, we also provide OTHER references (generally multiple) to the literature for these primary fixed points in the menu item References for Temperature Points.

Instruction:Total Records:   17
Substance
 
Transition
 
T90 (K)
 
u(T90)
(mK)
 
T-T90
(mK)
 
u(T-T90)
(mK)
 
Squib
 
More
Data
 
He VP 0.65 to 5.0 <1 |T-T90|<2 <1 manage_search
H2 TP 13.8033 0.15 0.36 0.01 manage_search
e-H2 VP1 17.035 0.15 0.29 0.01 manage_search
e-H2 VP2 20.27 0.15 0.16 0.01 manage_search
Ne TP 24.5561 0.09 -0.06 0.2 manage_search
O2 TP 54.3584 0.06 -2.21 0.14 manage_search
Ar TP 83.8058 0.06 -4.21 0.15 manage_search
Hg TP 234.3156 0.2 -2.89 0.13 manage_search
H2O TP 273.16 0 0.1 0.1 manage_search
Ga MP 302.9146 0.2 3.84 0.34 manage_search
In FP 429.7485 0.8 10.1 0.8 manage_search
Sn FP 505.078 0.6 11.5 1.3 manage_search
Zn FP 692.677 0.8 13.8 6.9 manage_search
Al FP 933.473 2 28.7 6.6 manage_search
Ag FP 1234.93 4 46.2 14 manage_search
Au FP 1337.33 25 39.9 20 manage_search
Cu FP 1357.77 25 52.1 20 manage_search