Thermal conductivity sensor
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United States of America Patent
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Jul 13, 2010
Grant Date -
Sep 27, 2007
app pub date -
Mar 19, 2007
filing date -
Mar 21, 2006
priority date (Note) -
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Abstract
A sensor for determining the thermal conductivity of a fluid comprising a sensing module located within a housing having inlet and outlet ports for a fluid under test, the sensing module comprising a reference base surface and a sensing element spaced therefrom and having measure and reference sections, and there being provided electrical power monitoring means for monitoring the power through the measure and reference sections in order to generate a signal indicative of the power difference due to thermal conductivity through the fluid. The sensing element is a thick film printed disc with measure and reference resistors printed on it. All changes in the fluid are common to both the measure and reference sections except for the thermal conductivity of the fluid itself.
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