The invention relates to a monolithic weighing system (10), comprising a base (12), a load holder (26), which is articulated on the base (12) by means of a parallel link arrangement (16, 20), and a lever (28), which is articulated on the load holder (26) and which has an insertion point for a force-compensating arrangement and a target area (32) for an optical position sensor (34), wherein the target area (32) has a slotted diaphragm (36) in a thin-walled lever section of the lever (28) in the deflection plane thereof. The invention is distinguished in that a pedestal (38a,b) that is integrally connected to the base (12) is arranged adjacent to the target area (32) and is provided with a pedestal perforation (40a,b) oriented at right angles to the deflection plane, wherein the slotted diaphragm (36) of the target area (32) is made through the pedestal perforation (40a,b) by means of laser machining.