RTD & thermocouple: what changes inside?
RTD · electron scattering
Thermocouple · Seebeck effect
Sensor temperature
100 °C
Terminal temperature
25 °C
Microscopic marks are schematic; thermocouple numbers use an illustrative constant 40 µV/K thermopower difference.
NIST · platinum resistance thermometers
NIST · thermocouples