by David Southworth
Thermometry bridges play a crucial role in temperature measurement, particularly when it comes to the interpolation of the Standard Platinum Resistance Thermometer (SPRT) specified by the ITS-90. However, to achieve precise and reliable results, it is essential to calibrate these bridges accurately. In this article, we will explore the history of bridge calibration, common methods used for verification, and introduce a solution known as the Resistance Bridge Calibrator (RBC) developed by Rod White at MSL New Zealand [1].
