Liquid flow sensor thermal interface methods and systems

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

Reexamination Certificate

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Reexamination Certificate

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06871537

ABSTRACT:
A sensor method and system are disclosed. A fluid flow sensor can be provided, which measures the thermal conductivity of a fluid. The sensor itself can be configured to comprise one or more sensing element associated with a sensor substrate. A heater can be associated with said sensor wherein said heater provides heat to said fluid. A film component can also be provided that that isolates said fluid from said heater and said sensor, such that said film component conducts heat in a direction from said heater to said sensor, thereby forming a thermal coupling between said sensor, said heater and said fluid, which permits said sensor to determine a composition of said fluid by measuring thermal conductivity thereof without undesired losses of heat in other directions. The film component can be configured on or in the shape of a tubing or a flow channel.

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“What are 3M Z-Axis Adhesive Films?” Nov. 15, 2003 http://www.3m.com/us/mfg_industrial/adhesives/html/what_are_z-axis.jhtml.

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