Patent ID: 6794587
Filing Date: 2004-09-21
Classification: G01G,G01L

Abstract:
A hermetically sealed sensor including a monolithic proof body (1) having at its ends a first (2) and a second (3) non-deformable parts connected together by a central part designed as a deformable parallelogram, characterized in that the central part of the proof body (1) has two through openings (6, 7) defining between them a main beam (10) of which at least one end is joined via a connecting section (13) to a measuring beam (12) which forms one piece with a non-deformable part (2, 3) of the proof body, but is uncoupled mechanically from the same; in that at least one of the non-deformable parts (2, 3) of the proof body has at least one cavity (4, 4â€², 22) of which one wall is formed by the measuring beam (12) and by two membranes (15) situated one on each side of this measuring beam (12); in that strain gauges (17) are fixed inside the cavity (4) on the back of the measuring beam (12); and in that the cavity (4) is closed by a cover (20) which is welded, bonded, or fixed tightly to the corresponding non-deformable part (2, 3) of the proof body.