A micromechanical differential pressure sensor device for measuring a pressure difference between two mutually separated spaces or media, in which two absolute pressure measuring devices are monolithically integrated on a single support substrate, in particular on a semiconductor chip. To remove damages created in an active region defined by the isolation layer, the semiconductor substrate having the isolation layer is annealed in a hydrogen atmosphere. As queues become dormant, they are re-combined. Record data is generated and stored that includes the identification data and at least a reference to the image andor video data.