Low Uncertainty
The 5947 Mini Metal-Cased Aluminum Cell's 156mm immersion depth, 7.8mm
reentrant well diameter, and ultra pure (>99.9999%) metal samples
provide uncertainties of just ±2mK, which even
exceeds the performance of mini quartz aluminum cells. When used in a
9114 Freeze-Point Furnace, plateaus that last over 20 hours can be
achieved. In a 9260 furnace, the cell can easily provide a long enough
plateau for a full day's work, with an uncertainty due the realization
of just ±4mK.Faster than
Quartz Cells
Hart's 5947 cells in a large furnace achieve nearly the same uncertainty
levels as traditional quartz fixed-point cells, but the 5947 mini cells
in combination with Hart's 9260 cost less, work faster, and are easier
to use.
Less fragile than Quartz
Unlike the quartz-encased cells, our stainless steel-encased aluminum
cells do not require hand delivery because they are much less
susceptible to accidental breakage.
Practical and Precise
As with other fixed-point cells, these mini metal-cased cells are great
to have in the lab to help maintain your internal standards, because
fixed-point cells have very reproducible results with low uncertainties.
If your doing comparison calibrations with SPRTs, then you know the
importance of occasionally checking them all at the triple point of
water. As an added measure, two SPRTs with readings that do not agree at
higher temperatures can be checked easily and definitively in a metal
fixed-point cell.
To enhance the practicality of the mini
fixed-point cells. Professor Xumo Li studied the impact of using a
simple but effective melting procedure for fixed-point cells. His paper,
"The Comparison Between the Freezing Point and Melting Point of Tin,"
demonstrates just how effective this method can be. If you're looking
for high-level mini fixed-point cell training, be sure to ask us about
options and availability. |
