A thermocouple has two different conduits framing electrical intersections at varying temperatures. The thermocouple creates a temperature-subordinate voltage because of the thermoelectric impact and can be deciphered as a temperature estimation.
An RTD - Resistance Thermometer Detector - is made of a length of fine wire folded over a clay or glass center. The RTD wire is of unadulterated material - regularly platinum, nickel, or copper - with an exact obstruction/temperature relationship. The electrical obstruction gives a sign of the temperature.
A thermistor is a kind of resistor made of artistic or polymer materials. The obstruction is - like the RTD - subject to temperature. You may read complete guide related to it at https://tacunasystems.com/knowledge-base/force-measurement-tips/comparing-strain-gauges-to-piezoelectric-sensors/