Flow sensor element and method of using same

Measuring and testing – Volume or rate of flow – Thermal type

Reexamination Certificate

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Reexamination Certificate

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06898969

ABSTRACT:
A flow sensor element is provided having at least one temperature-measuring element and at least one heating element each having at least one platinum thin film resistor, the at least one temperature-measuring element and the at least one heating element each being arranged on a carrier element which is formed from a ceramic foil laminate or a multi-part ceramic component. The carrier elements have electrical conductor paths and junction surfaces for electrically contacting the at least one temperature-measuring element and the at least one heating element. The at least one temperature-measuring element and the at least one heating element each have a metallic carrier foil with an electrically insulating coating, on which the platinum thin film resistors are arranged. The flow sensor element may be used for mass through-flow measurements of gaseous or liquid media in pipe ducts, for example in an exhaust gas pipe of an internal combustion engine.

REFERENCES:
patent: 5396795 (1995-03-01), Araki
patent: 5744713 (1998-04-01), Wienand et al.
patent: 195 06 231 (1995-08-01), None
patent: 199 41 420 (2000-04-01), None
patent: 101 24 964 (2002-12-01), None
patent: 102 25 602 (2004-01-01), None
patent: 1 065 476 (2001-01-01), None

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