Instrumentation (INS) Practice Test

A thermocouple operates on the Seebeck effect, where a temperature difference between two dissimilar metals creates a small voltage. This makes it a thermoelectric sensor, not an inductive one. Inductive sensors produce voltage from changing magnetic flux or current in coils, which isn’t how a thermocouple generates its signal. The output is a millivolt-level voltage proportional to temperature difference, with no reliance on magnetic induction. While wiring can introduce slight parasitic effects at high frequencies, the fundamental sensing mechanism remains thermoelectric, not inductive. So the statement is false.