Pressure transmitter

US7062974B2 · kind B2 · utility

Assignee

• VEGA Grieshaber KG · DE

Inventors

• Ewald Boehler · Furtwangen, DE
• Jörn Jacob · Wolfach, DE

Key dates

• Filing date: Jun 28, 2001
• Grant date: Jun 20, 2006
• Expiry date: Jun 28, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L19/0645
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a pressure transmitter for an overload-proof pressure gauge, comprising a base body, a separating membrane disposed on a pressure-sensitive side of the pressure transmitter and subjectable to a pressure to be measured, a communicating chamber located inside said base body, which receives a pressure transmission medium, said chamber being closed on the pressure-sensitive side by the separating membrane, wherein the coefficient of thermal expansion of the pressure transmission medium is established in such a way that a temperature-induced change in the volume of the communicating chamber equals a temperature-induced change in the volume of the pressure transmission medium.