Realising ITS-90
Some practical suggestions concerning the realisation of the ITS-90
Realising the ITS-90 Fixed Points
1: below -38.834°C To be added2: from -38.834°C to 961.78°C
The ITS-90 fixed points in the this range are,
| Substance | Temperature K | Temperature °C | State | Additional Information |
|---|---|---|---|---|
| Mercury, Hg | 234.3156 | -38.8344 | Triple Point | Watch This Space! |
| Water, H20 | 273.16 | 0.01 | Triple Point | A Technical Guide and Standard for the Qualification and use of Water Triple Point Cells |
| Gallium, Ga | 302.9146 | 29.7646 | Melting Point | A Technical
Guide and Standard for the use of Gallium Melt-point Cells |
| Indium, In | 429.7485 | 156.5985 | Freezing Point | Realising Indium, Tin and Zinc Points |
| Tin, Sn | 505.078 | 231.928 | Freezing Point | Realising Indium, Tin and Zinc Points |
| Zinc, Zn | 692.677 | 419.527 | Freezing Point | Realising Indium, Tin and Zinc Points |
| Aluminium, Al | 933.473 | 660.323 | Freezing Point | Realising Aluminium and Silver Points |
| Silver, Ag | 1234.93 | 961.78 | Freezing Point | Realising Aluminium and Silver Points |
3: Above 961.78°C To be added
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