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The Internet resource for the International Temperature Scale of 1990.

Temperature Scale and General Temperature information for metrologists, scientists, calibration engineers and those with an interest in the temperature scale and its realisation

The Water Triple Point

The triple point of water is the most important defining thermometric fixed point used in the calibration of thermometers to the International Temperature Scale of 1990. It is the sole realizable defining fixed point common to the Kelvin Thermodynamic Temperature Scale (KTTS) and the ITS-90; the assigned value on these Scales is 273.16 K (0.01°C).

A Review of Some of the Best Articles Written About Water and Its Triple Point

NEW: Freeware Uncertainty Calculator Update

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