Abstract: The invention relates to a measuring sensor with a deformation body (7) on which at least one strain gage (2) is applied. In that regard, the strain gage (2) is hermetically sealed against external environmental influences by at least one thin deep drawn metallic sheet metal part (4). This hermetic sealing sheet metal part (4) is preferably embodied bowl-shaped and consists of a high-strength hardenable corrosion-resistant spring steel of the maraging type with 7.8 weight % nickel, 13 weight % chromium, 1 weight % molybdenum, 0.2 weight % silicon, 0.3 weight % manganese, 0.25 weight % beryllium, 0.2 weight % titanium as well as the remainder iron, which surprisingly comprises only a small hysteresis and has at least equally good creep characteristics as the stainless martensitic spring steels of the deformation body (7).