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Large Sealed Gallium Fixed Point Cell
Isotech, Sostmann Sealed Gallium Fixed Point Cell

Product Code: ITL-M-17401
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   Product Description    Downloads
Uncertainty 0.000070
Thirty Years of PRoven Use
Open and Sealed Models

Second only to the Water Triple Point and in many ways because of its ease of use and purity, superior to it, is the Gallium Melt Point. At 19.7646°C this is a very convenient temperature.

Total Confidence
Confidence is a major requirement in a standard. The Isotech Gallium Cell and Apparatus have a long history and have been successfully used in most National and Primary Laboratories world-wide.

International comparisons prove the quality of the Isotech Cells and are unique in the number, and history of comprehensive evaluations

Calibration of Isotech's Reference Cell with the Standard at NIST showed an agreement of 4μK, 0.000004°C.

The Isotech Gallium cells contain the highest purity metal, >99.99999% pure (7N) and giving a flat plateau. The cell has a day to day reproducibility of just +/-0.000025°C

Developed in the 1970s by Henry Sostman the design is of the highest standard. The metal is contained within a resilient inner housing that ensures no contamination or reaction with the Gallium. The Surrounding outer metal sleeve provides longitudinal uniformity of temperature and further mechanical strength. With several hundred cells chipped to all parts of the world all have arrived without damage.

Sealed Cell In general we recommend the sealed cell, it has the convenience of the sealed construction along with the sub mK performance.
Model ITL-M-17401
Temperature 29.7646°C
Metal Purity > 99.99999 7N
Outside Diameter 38mm
Inside Diameter 12mm
Total Height 420mm
Metal Depth 230mm
Uncertainty* 0.25mK
The Cell is supplied with a Certificate of Metal Purity

* We have a choice of UKAS calibration Services, the stated uncertainty figure is for our Premium UKAS calibration Service

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