International temperature scale | has proposal date 1927 | ![has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:44.0 has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:44.0](facet.gif) |
has acronym ITS90 | ![has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:44.0 has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:44.0](facet.gif) |
has definition A temperature scale defined between 0.65 K and the highest temperatures practicably measurable in terms of the Planck radiation law using monochromatic radiation. There are 17 fixed temperature points : - Below 5 K are defined in terms of the vapour pressures of helium 3 and helium 4
- Between 5 K and the triple point of water are marked by the triple points of certain elements, e.g. neon (24.5561 K)
- Above 0.01 °C are defined with reference to the freezing points of specified metallic elements
- Upper limit is 1064.43 °C (1337.58 K), the freezing point of gold
[JN92] -has source: J. A. Hall, 1967 | ![2001-09-27 09:32:44.0 2001-09-27 09:32:44.0](facet.gif) |
is a kind of temperature unit | ![has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:44.0 has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:44.0](facet.gif) |
temperature unit | is a unit of temperature | ![2001-09-27 09:32:42.0 2001-09-27 09:32:42.0](facet.gif) |
has triple point of water -has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall | ![2001-09-27 09:32:42.0 2001-09-27 09:32:42.0](facet.gif) |
has absolute zero -has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall | ![2001-09-27 09:32:42.0 2001-09-27 09:32:42.0](facet.gif) |
unit | has historical origin | ![2001-09-27 09:32:42.0 2001-09-27 09:32:42.0](facet.gif) |
represents | ![2001-09-27 09:32:42.0 2001-09-27 09:32:42.0](facet.gif) |