Difference Between 2 wire RTD, 3 wire RTD, and 4 wire RTD's
Why 3 Wire RTD is more accurate than 2 Wire RTD | RTD Lead Wire Compensation - YouTube
I Will Teach You - RTD Sensor Connections Proper connections for all three types of RTD sensor (2-wire, 3-wire, and 4-wire) to a user configurable transmitter are shown in the following illustrations: