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| Gallium Fixed Point |
| Sostmann-Isotech Gallium Cell |
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Simple, Automatic, Proven. |
From Solutions for Primary and Secondary Laboratories |
Thirty Years of Proven Use
Open and Sealed Models
Uncertainty to 0.00007°C |
Data Sheet |
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 29.7646°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.
Quality
Developed in the 1970s by Henry Sostmann 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 shipped to all parts of the world all have arrived
without damage.
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