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International temperature scale
(ITS90)
subjectfact 
International temperature scalehas proposal date 1927has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:44.0
has acronym ITS90has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:44.0
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
is a kind of temperature unithas source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:44.0
temperature unitis a unit of temperature2001-09-27 09:32:42.0
has triple point of water -has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall2001-09-27 09:32:42.0
has absolute zero -has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall2001-09-27 09:32:42.0
unithas historical origin2001-09-27 09:32:42.0
represents2001-09-27 09:32:42.0