INTERCOMPARISON OF GALLIUM SEALED CELLS - BCR PROJECT MTR-38
The work described in this report concerns the characterization of gallium cells manufactured by three national standards laboratories, namely, National Physical Laboratory (NPL, United Kingdom), Institut National de Metrologie (INM, France) and Istituto di Metrologia G. Colonnetti (IMGC, Italy). Each laboratory manufactured its own cell using a slightly different design but giving results which were very close to each other. It has been shown that a cell for realizing either the triple or the melting point of gallium can be a very reproducible fixed point device near 29.77 degrees C. Potentially, it has several important applications as a secondary reference point in, for example, the calibration of standard platinum resistance thermometers, and in the checking of medical thermometers. However, to establish its validity as a fixed point, its reproducibility when manufactured to different designs and with gallium from different sources, needs to be determined.
Bibliographic Reference: EUR 10101 EN (1985) FS, 46 P., BFR 200, EUROFFICE, LUXEMBOURG, POB 1003
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Record Number: 1989124007500 / Last updated on: 1987-01-01
Available languages: en