The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 2013
Filed:
Jan. 13, 2011
Changlin Wang, Shanghai, CN;
Fengjin Wang, Shanghai, CN;
Jun Xia, Shanghai, CN;
Xiaokai Wang, Shanghaus, CN;
Jürgen Ammann, Zürich, CH;
Changlin Wang, Shanghai, CN;
Fengjin Wang, Shanghai, CN;
Jun Xia, Shanghai, CN;
Xiaokai Wang, Shanghaus, CN;
Jürgen Ammann, Zürich, CH;
Mettler-Toledo AG, Greifensee, CH;
Abstract
Exemplary embodiments of the present invention are directed to methods and devices for detecting open-circuit and short-circuit failure in an electromagnetic (inductive) measurement of the conductivity of liquids and on the sensor and cable wiring. An electromagnetic measurement of the conductivity of a liquid is performed by immersing a sensor into the liquid, wherein the sensor includes at least 2 toroidal cores, one of them carrying an excitation coil and the other carrying an induction coil. When an AC excitation voltage is applied to the excitation coil, an induced current or voltage can be measured in the induction coil which is proportional to the conductivity of the measured liquid.