Method for determining and/or monitoring at least one process variable of a medium, a corresponding electrochemical sensor and a corresponding system

US9075036B2 · kind B2 · utility

Assignee

• Endress+Hauser Conducta Gesellschaft fuer Mess- und Regeltechnik mbH + Co. KG · DE

Inventors

• Achim Gahr · Goldbach, DE
• Torsten Pechstein · Radebeul, DE
• Thomas Wilhelm · Zürich, CH

Key dates

• Filing date: Nov 6, 2012
• Grant date: Jul 7, 2015
• Expiry date: Jul 30, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/30
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for determining and/or monitoring at least one process variable of a medium by the utilization of at least of an electrochemical sensor comprising at least a first reference half cell and a second reference half cell, and comprising the method steps as follows: measuring a first electrical measured variable X1, cont with a first measuring period t1, meas and a first measuring interval t1, int with reference to the first reference half cell; measuring at least a second electrical measured variable X2, discont with a second measuring period t2, meas and a second measuring interval t2, int with reference to the second reference half cell; wherein the second measuring interval t2, int is greater than the first measuring interval t1, int; and determining the at least one process variable from at least one electrical measured variable X1, cont or X2, discont. Furthermore, the invention relates to an electrochemical sensor and to a system.