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:
Feb. 17, 2009
Filed:
Feb. 22, 2007
Applicants:
Felix Mayer, Stäfa, CH;
Moritz Lechner, Stäfa, CH;
Mark Hornung, Männedorf, CH;
Marc Von Waldkirch, Zollikon, CH;
Inventors:
Felix Mayer, Stäfa, CH;
Moritz Lechner, Stäfa, CH;
Mark Hornung, Männedorf, CH;
Marc von Waldkirch, Zollikon, CH;
Assignee:
Sensirion AG, Stafa, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01F 1/68 (2006.01);
U.S. Cl.
CPC ...
Abstract
The flow sensor comprises a heater arranged between two sensing thermopiles. In addition, at least one monitoring thermocouple is provided for measuring the temperature of the heater. The signal from the monitoring thermocouple is used as a reference voltage for an A/D converter, which converts the signals from the sensing thermopiles. This allows to increase the resolution of the converter at higher flows, which results in more accurate measurements.