kylmäliitäntäanturin

A kylmäliitäntäanturi, or cold junction sensor, is a type of temperature sensor used in thermoelectric measurements. Its primary function is to accurately measure the temperature at the junction of a thermocouple where it connects to the measurement instrument or wiring. This junction is referred to as the "cold junction" because it is typically at a different temperature than the "hot junction" where the actual measurement is taken.

The voltage generated by a thermocouple is proportional to the temperature difference between the hot and cold junctions. To accurately determine the temperature at the hot junction, the temperature at the cold junction must be known. The kylmäliitäntäanturi provides this crucial reference temperature. Common types of kylmäliitäntäanturit include thermistors, RTDs (Resistance Temperature Detectors), and semiconductor-based sensors. The choice of sensor depends on factors such as the required accuracy, temperature range, and cost.

By measuring the cold junction temperature, the instrument can compensate for its influence, allowing for a precise determination of the temperature at the point of interest. Without this compensation, the thermocouple readings would be inaccurate. Kylmäliitäntäanturit are essential components in many industrial, scientific, and laboratory applications where accurate temperature monitoring is critical, such as in furnaces, engines, and chemical processes.