RTDThermistorLeitungen

RTDThermistorLeitungen refers to the electrical connections used for Resistance Temperature Detectors (RTDs) and thermistors. RTDs are temperature sensors that exhibit a change in electrical resistance with temperature. Thermistors are also temperature-sensitive resistors, but they typically have a much larger resistance change over a narrower temperature range compared to RTDs. The term "Leitungen" is German for "lines" or "wires," indicating the wiring or lead system associated with these sensors.

The type of wiring used for RTDs and thermistors is crucial for accurate temperature measurement. For RTDs, the resistance of the connecting wires can introduce errors, especially over long distances or with small resistance changes in the sensor. To mitigate this, different lead configurations are employed: two-wire, three-wire, and four-wire. A two-wire configuration is the simplest but most susceptible to lead resistance errors. A three-wire configuration uses a compensating wire to cancel out some of the lead resistance. A four-wire configuration offers the most accurate measurement by using separate current-carrying and voltage-sensing wires, effectively eliminating lead resistance effects.

Thermistors, particularly NTC (Negative Temperature Coefficient) thermistors, have a higher base resistance than most RTDs. While lead resistance can still be a factor, it is often less critical than with RTDs, especially in applications where the thermistor's resistance change is significant. Nevertheless, for precise measurements, similar principles of minimizing lead resistance can be applied, often through using thicker gauge wires or specific bridge circuit configurations. The material and gauge of the Leitungen are chosen based on the sensor's resistance, the expected temperature range, the required accuracy, and the length of the connection.