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| Quartz Encased Higher Temperature Fixed Point Cells | |
| Sealed and Open Fixed Point Cells | |
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Open and Sealed ITS-90 Fixed Point Cells |
 From Databook 1 |
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 Data Sheet |
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| First developed during the 1970’s by Henry Sostmann these cells meet all the requirements of science and industry for Fixed Point Realizations of ITS-90. The cells now offered by Isotech have been increased in purity and length to conform to the requirements of optimal realizations except that we have sealed in 1 atmosphere of 6N pure argon at the freeze temperature for you. Sealed optimal realizations of ITS-90 are made from metal exceeding 6N5 purity and have a useable depth below the metal surface of more than 200mm. They come complete with Inconel basket, a carry case and the necessary heat shunts and reflectors to enable them to fit into our apparatus. See the datasheet for full details of open and sealed cells. |
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