I was recently involved in an industrial project for a client’s critical application that required RTDs and thermocouples. The buyer’s main concern seemed to be the cost, assuming that all temperature sensors probably cost the same. However, not all applications are the same, and not all temperature sensors are created equal, so prices can vary. The prices of RTDs and thermocouples are determined by a number of factors, including the applications for which they’re being used and the temperatures in which they’re working.