These cells are used to correlate radiation thermometers to the ITS-90 Scale as well as provide the highest accuracy Blackbody Sources available. All Cells contain 99.9999% pure metals and will provide a melt or freeze curve to within ±0.01°C. The Primary Cells used in our larger sources will provide significantly longer plateaus. The results, as seen by a radiation pyrometers, which are slightly sensitive to wall temperature, give uncertainties of better than ±0.25°C. Easy replacement allows one apparatus to work with multiple cells.
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