Pressure cell device for measuring hydraulic pressures

US7040174B2 · kind B2 · utility

Assignee

• DBT Automation GmbH · DE

Inventors

• Sebastian Mundry · Marienheide, DE
• Jens Titschert · Grafenau, DE
• Reiner Frank · Gevelsberg, DE
• Jurgen Tschope · Selm, DE

Key dates

• Filing date: Dec 17, 2003
• Grant date: May 9, 2006
• Expiry date: Feb 17, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L9/0051
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The pressure cell device according to the invention serves for measuring hydraulic pressures in hydraulic mining devices in an inherently secure service region. It is provided with a connection element which can be connected to a pressure reception connection and with a sensor housing, on the inside of which is arranged a hydroelectric pressure transducer which is pressurised by the hydraulic pressure present at the pressure reception connection and converts this into an electrical signal. So as to ensure high measurement accuracy over a long operating period, without it being necessary to have exchanges of the pressure transducer or its new calibration, it is provided according to the invention that the pressure transducer comprises a ceramic pressure measuring cell.