When choosing between Resistance Temperature Detector (RTD) temperature sensors and thermocouple temperature sensors, the decision isn’t alwayWhen choosing between Resistance Temperature Detector (RTD) temperature sensors and thermocouple temperature sensors, the decision isn’t always straightforward. Both technologies measure temperature reliably, but the difference between RTD and thermocouple performance becomes critical when accuracy, stability, response time, and operating range directly affect your validation results.s straightforward. Both technologies measure temperature reliably, but the difference between RTD and thermocouple performance becomes critical when accuracy, stability, response time, and operating range directly affect your validation results.