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Slim Mercury Triple Point Cell Model 17724M Iss.05 – 01/13
INTRODUCTION
Isotech produce a range of Slim Cells whose physical size is smaller than ITS-90 optimal cells, which are designed to
fit bench top sized apparatus.
The most recent slim cell to be designed together with a portable apparatus named Europa is a Slim Mercury Triple
Point Cell. At -38.8344°C the cell and apparatus (which can also be used with Water and Gallium Cells) offer a
complete breakthrough in ITS-90 Fixed Points.
WHAT ARE SLIM CELLS?
The special requirements of immersion depth, plateau duration, etc. required for the calibration of SPRT’s may not
be necessary in laboratories charged with calibrating industrial resistance thermometers, thermocouples and
thermistors, but mobility and cost may be more important.
“Slim Cells” is a name given to another category of cell, being somewhat slimmer, slightly shorter and lower in price
than the standard varieties. Slim cells are built using the same materials, techniques and purity of metal as the larger
cells, but the uncertainties associated with them are somewhat larger, not because of the cells but precisely because
their properties cannot be measured with SPRT’s and transfer thermometers must be employed in qualifying them.
The Europa apparatus was specifically developed to accommodate and condition the Slim Mercury Triple Point Cell.
INSTALLATION
On arrival the Slim Mercury Cell should be inspected for damage. Because it is a triple point cell, it should click when
shaken.
If the vacuum has been lost then please immediately contact Isotech.
The cell should be assembled into the Europa according to Figure 1 using the insulation provided.
TRANSPORTATION RESTRICTION
Due to its hazardous nature, Mercury must be packed and transported in accordance to IATA specification.