User-friendly bayonet lock for the plug connection between sensor and transmitter: The invention by Lothar Auerswald, Ingrid Wunderlich and Dr. Torsten Pechstein (from left to right) provides a protective cover for the sensor electronics in the inductive signal and energy transmission between sensor and transmitter. The closure is also designed to reliably lock the plug connection to the transmitter cable - "without the cable being twisted during coupling or the plug connection opening automatically," emphasizes Pechstein. The solution consists of just three plastic parts.