Separating membrane for pressure sensor

摘要

A separating membrane for use particularly in pressure sensors, for separating between a process fluid and a pressure-transferring hydraulic oil, is described. The separating membrane is in the form of a thin foil covering an opening into a volume containing the oil, with the foil being fastened to the edges of the opening, and is characterized in that the separating membrane is fastened at the edges of the opening in such a manner that it, in at least one region of its area, exhibits a transition from a concave to convex bulging, whereby the membrane is able to accommodate a volume change of the oil through a non-energy requiring translation of the transition(s). Also described are a method of manufacturing the separating membrane as well as a pressure sensor comprising the separating membrane.

主权项

1. A separating membrane for separating a process fluid and a pressure-transferring fluid,
the separating membrane being in the form of a thin foil covering an opening into a volume containing the pressure-transferring fluid, the foil being fastened to edges of the opening, wherein the separating membrane is fastened to the edges of the opening in such a manner that, in at least one region of an area thereof, the foil being elastically compressible and being elastically compressed such that the membrane exhibits a transition from a concave bulging to a convex bulging, and a location of the transition being movable by translation to different positions on the separating membrane whereby the separating membrane is able to absorb a volume change of the pressure-transferring fluid through a non-energy requiring translation movement of the transition.