Please note the line resistance when connecting 2-wire technique to a PT100 sensor. It leads to a distor- tion of the measurement result. These faults can be avoided with using 3-wire – or even better – 4-wire technology.

In PT1000 measurements this fault is less significant, as the voltage is smaller, thanks to the higher resistance. Therefore the line resistance leads to a smaller fault. An additional positive effect of the smaller voltage is, that the sensor does not heat up as much.