Abstract: A pressure sensor, comprising: a substrate having a measuring membrane, and an electrically conductive cover layer, which has electrical contact elements and is electrically isolated from the substrate by an insulating layer. The cover layer is divided in such a manner that two independent measurements of the respective resistance between two contact elements are possible in two regions electrically isolated from one another. The regions of the cover layer serve to shield external electromagnetic influences from the sensor elements of the measuring membrane, to detect damage to the measuring membrane, as well as for determining exact temperature.

Abstract: A pressure sensor comprising: a substrate having a measuring membrane formed therein; and an electrically conductive, cover layer, which has electrical contact elements and is electrically isolated from the substrate by an insulation layer. The cover layer is divided in such a manner that two independent measurements of the respective resistance between two contact elements are possible in two regions electrically isolated from one another. The regions of the cover layer serve to shield external electromagnetic influences from the sensor elements of the measuring membrane, to detect damage to the measuring membrane, as a well as for determining exact temperature.

Abstract: The invention relates to a piezoelectric drive, in particular for microvalves. The drive comprises a deformation layer coupled on one side to a piezoelectric layer, which is provided with at least one pair of electrodes, made of two electrodes of opposite polarities, to provide electricity. According to the invention, both electrodes of opposite polarities of the pair of electrodes are arranged together on the side of the piezoelectric layer facing away from the deformation layer. The invention also relates to a microvalve comprising at least one valve channel and a membrane that opens or closes the valve channel, where the membrane simultaneously forms the deformation layer of such a piezoelectric drive.

Abstract: The invention relates to a piezoelectric drive, in particular for microvalves. The drive comprises a deformation layer coupled on one side to a piezoelectric layer, which is provided with at least one pair of electrodes, made of two electrodes of opposite polarities, to provide electricity. According to the invention, both electrodes of opposite polarities of the pair of electrodes are arranged together on the side of the piezoelectric layer facing away from the deformation layer. The invention also relates to a microvalve comprising at least one valve channel and a membrane that opens or closes the valve channel, where the membrane simultaneously forms the deformation layer of such a piezoelectric drive.

Abstract: Device for automatically implementing the SPE method, with a two-dimensional needle arrangement which is suitable for removing substances from different two-dimensional specimen vessel arrangements and dispensing them under pressure into a two-dimensional cartridge arrangement.

Abstract: Device for automatically implementing the SPE method, with a two-dimensional needle arrangement which is suitable for removing substances from different two-dimensional specimen vessel arrangements and dispensing them under pressure into a two-dimensional cartridge arrangement.

Abstract: A positioning aid for liquid handling devices with a horizontally movable holding device for adapter and microtitration plate is disclosed. The holding device has a flexible tube extending in a closed channel and compressed air can be applied to the tube. The channel has, at least in the area of sliding pins which are arranged so as to be pretensioned by springs, widened portions which widen in the opposite direction to that of the spring, so that the sliding pins remain in a rest position when the tube is in the pressureless state so as to enable manipulation of the adapter and microtitration plate without friction, but, when compressed air is applied, occupy a clamping position in such a way that the tube fills out the widened portions so that the sliding pins contact the microtitration plate without play and the microtitration plate, in turn, contacts the stops of the adapter which are located across from the sliding pins, and the adapter contacts the fixed stops of the holding device without play.