A protective container for holding a reusable control part of a transcutaneous sensor system for detecting at least one analyte in a bodily fluid is disclosed. The control part includes at least one coupling, which has at least one sensor coupling for connection to at least one transcutaneous sensor. The protective container has at least one container housing. The control part can be held in the container housing. The container housing is adapted to shield the control part from environmental influences. The container housing also has at least one connector which can be connected to the coupling and seals the latter in a media-tight fashion.