PSz series, DC/DC group, like other displacement transducers made by Peltron are based on the differential transformer principle – LVDT. The transformer is placed inside a cylindrical case. There is a magnetic core inside the transformer. Displacement of the core results in a change in the transducer’s output signal. This series is equipped with a return spring so the core’s end is not fixed to a moveable object. One transducer of PSz series to work properly needs only a power supply.