Comparison of low-temperature scales of platinum resistance thermometers

The Derivation of the Provisional Reference Table CCT 64,T= f (W) for Platinum Resistance Thermometers for the Range from 12 to 273.15 °K: Part I. The Derivation of the Table for the Range from 12 to 95 °K

“…I n this way the international scale in this region of temperature would be defined. The preliminary comparison of the PRMI scale and the NBS scale, which was used for the Calibration of the NPL thermometer G,, showed considerable differences between these low temperature scales [ 6 ] . The working group proposed to begin by carrying out an international comparison of the existing national low temperature scales.…”