Measuring Temperature with RTDs – A Tutorial

Temperature Scale (ITS-90) that is used with wire-wound RTDs (αÊ=Ê0.003925). The Callendar-Van Dusen coefficients for each of these three platinum RTD curves are listed in TableÊ1. RTD Measurement Circuits. Because the RTD is a resistive device, you must drive a current through the device and monitor the resulting voltage. However, any ...