Inductive conductivity sensor

US7965167B2 · kind B2 · utility

Assignee

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

Inventors

• Marco Volker · Döbeln, DE
• Andreas Eberheim · Hartha, DE
• Torsten Pechstein · Radebeul, DE

Key dates

• Filing date: Jan 31, 2008
• Grant date: Jun 21, 2011
• Expiry date: Jan 31, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/025
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A conductivity sensor for measuring conductivity of a medium surrounding the conductivity sensor includes a first toroidal coil bounding a medium-receiving passageway and serving for inducing an electrical current in the medium, and a second toroidal coil also bounding the passageway and serving for registering a magnetic field produced by the electrical current. At least one of the toroidal coils has a plurality of first conductor segments, which extend in a plane of a multi-ply circuit board, a plurality of second conductor segments, which extend in a second plane of the circuit board, and a plurality of through-contacts, which connect the first conductor segments with the second conductor segments, wherein the first conductor segments, the second conductor segments and the through-contacts form, together, the windings of a toroidal coil.