Significant experimental contributions by NBS began with the work of Hoge and Brickwedde (29), who calibrated an ensemble of resistance thermometers against a gas thermometer to establish a scale (known as the NBS-39 Scale) for the calibration of thermometers from 14K to 83K.
T < 120 K) has been maintained at NBS/NIST since 1939 starting with the National Bureau of Standards Constant-Volume Gas Thermometer Scale of 1939 (NBS-39 Scale) (29).
5561 K Using an Interpolating Constant Volume Gas Thermometer, Proceedings of TEMPMEKO'96, edited by P.
The NBS-55 was a simple numerical modification to the NBS-39 Constant-Volume Gas Thermometer Scale (29) that lowered those temperatures by 0.
3] constant-volume gas thermometers (CVGTs); standard platinum resistance thermometers (SPRTs); and radiation thermometers.