Endress + Hauser Gmbh + Co. Kg

Endress+hauser Gmbh+co.

Ralf N&uuml;rnberger

Wolfgang Dannhauer

Dietfried Burczyk

Friedrich Schwabe

Frank L&ouml;ffler

A differential pressure pickup with a small hysteresis volume which has a sensor element, two pressure measuring chambers adjacent thereto, two pressure receiving chambers closed off by separating diaphragms and two overload chambers separated from each other by an overload diaphragm, in which pickup the overload diaphragm has a closed outer edge and a closed inner edge and is firmly restrained along its outer edge and its inner edge.

Differential pressure pickup

A differential pressure sensor, for determining the differential pressure between two measuring points, comprises a pressure vessel which is filled with a transfer fluid; a measuring cell which is arranged in the pressure vessel and is surrounded by the transfer fluid, with two half-cells; a diaphragm-like deforming body which separates the two half-cells from each other in a pressuretight manner; two pressure supply lines, which respectively feed the pressure from one of the two measuring points outside the pressure vessel to one of the two half-cells; and at least one pressure accumulator, the pressure of which acts on the transfer fluid in the vessel. Elastic or compressible bodies with a linear or degressive characteristic are suitable as the pressure accumulator. The pressure accumulator compensates for changes in volume of the transfer fluid on account of temperature fluctuations.

Growing community of inventors

Potsdam, Germany

Ralf Nürnberger

Growing community of inventors

Potsdam, Germany

Ralf N&uuml;rnberger

Ralf Nürnberger