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:
May. 10, 2016
Filed:
Dec. 22, 2010
Nicolas Cors, Stafa, CH;
Markus Schoni, Nanikon, CH;
Markus Wiggli, Tann, CH;
Adi Zuppiger, Siebnen, CH;
Nicolas Cors, Stafa, CH;
Markus Schoni, Nanikon, CH;
Markus Wiggli, Tann, CH;
Adi Zuppiger, Siebnen, CH;
TECAN TRADING AG, Mannedorf, CH;
Abstract
A device for detecting a phase boundary in a liquid tank a sensor that can be advanced in the direction of the phase boundary in the liquid tank. A circuit processes an output signal of the sensor to detect a change in capacitance and has a first channel with a first filter module to filter out a first signal having a short pulse width from the output signal and a second channel having a second filter module to filter out a second signal having a greater pulse width from the output signal. A controller module with comparator module determines whether the first signal reaches a first threshold value and a processing module determines whether the second signal meets predefined second signal criteria.