A plug connector part for charging an electrically-operated vehicle is provided. The plug connector part includes at least one electrical contact element which is connectable along an insertion direction to a counter-contact element of a counter-plug connector part and has a plurality of contact lamellae grouped around a plug opening for receiving the counter-contact element. The plug connector part also includes a spring element arranged at the contact lamellae circumferentially around the insertion direction, at least in portions, in order to provide a mechanical pre-tensing. Further, a sensor device is configured to detect a measurement variable and is arranged at least at one of the contact lamellae and is held by the spring element at the at least one of the contact lamellae.