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Title: Realization Of The Freezing Point Of Indium Using Stainless Steel-Cased Cells
Author: Xumo Li, Mingjian Zhao, Deming Chen
Source: 2004 Measurement Science Conference
Year Published: 2004
Abstract: A new stainless steel-cased indium cell has been developed and tested. The new cell design is described in detail. A new cell was compared against a traditional fused silica-cased indium cell, and the difference between them was within 0.2 mK. Multiple cells of the new design were compared with each other, with the differences well within 0.2 mK. The longterm stability of the new cell was checked after about ten months of use and no obvious drift has been detected. The expanded uncertainty (k2) was estimated to be 0.7 mK, which is good enough for the calibration of standard platinum resistance thermometers. The new cell can be used in a portable furnace to obtain almost the same uncertainty. The stainless steel is less fragile than fused silica as a cell case material, so the new cell provides many advantages compared with a fused silica-cased cell: the new cell can be shipped instead of being hand-carried, it is much more robust and durable, and it is easier to use.

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