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.
