Abstract: A pressure-responsive B-surface seat occupancy sensor unit for detecting an occupancy state of a seat comprises a pressure sensor arranged on a base plate. The pressure sensor includes a printed circuit board having a first surface with at least two electrodes and a second surface, with which the PCB is arranged on the base plate, and a membrane element arranged in facing relationship with and spaced from the electrodes so as to deflect under pressure and establish an electrical contact between the electrodes. The base plate includes one or more fixation elements, by means of which the base plate is fixable to the structural frame, the seat cushion and/or the cushion-supporting springs of the seat.

Abstract: “A film-type switching element includes a first carrier film, a second carrier film and a spacer that separates the carrier films a certain distance apart from one another, where the spacer includes a spacer film, which is arranged between and attached to the first and second carrier films, and whose thickness corresponds to the distance between the carrier films, the spacer has an opening therein, which extends between the first and second carrier films and defines the active zone of the film-type switching element, in which the first and second carrier films may be resiliently brought together in response to compressive force acting on the film-type switching element, where a contact arrangement having at least a first and a second electrode is arranged in the active zone on at least one of the first and second carrier films in such a way that an electric contact is established between the first and second electrodes when the first and second carrier films are brought together, the spacer including a frame

Abstract: A magnetic field sensor comprises a first and a second carrier foil and a spacer arranged there between. The spacer delimits a sensing region of the sensor in which the first and second carrier foils can be brought together against the their resiliency. At least two electrodes are arranged in the sensing region in such a way that an electrical contact is provided between them when the first and second carrier foils are brought together. The magnetic field sensor further comprises additional magnetizable layer associated with the first or the second carrier foil so that the first and second carrier foils can be brought together in response to a magnetic field.

Abstract: A magnetic field sensor comprises a first and a second carrier foil and a spacer arranged there between. The spacer delimits a sensing region of the sensor in which the first and second carrier foils can be brought together against the their resiliency. At least two electrodes are arranged in the sensing region in such a way that an electrical contact is provided between them when the first and second carrier foils are brought together. The magnetic field sensor further comprises additional magnetisable layer associated with the first or the second carrier foil so that the first and second carrier foils can be brought together in response to a magnetic field.