Patent ID: 7232255

Claim:
A system for determining and measuring the heat flow rate between a first and a second medium, said system comprising: at least two sensor units having signal outputs disposed in a spaced-apart relationship, each of said units including a transducer having apertures allowing fluid to pass therethrough; the transducer of a first sensor unit being affixed, at least indirectly, to a first surface on said first medium, the heat flow of which is to be determined, a second surface of said first transducer of the first sensor unit being exposed to said second medium; a first surface of the transducer of the second sensor unit being affixed to a calibration plate or a known coefficient of thermal conductivity, said calibration plate being located between said second sensor unit and said first medium and exposed to said first medium, the heat flow rate of which is to be determined, the second surface of said transducer of the second sensor unit being exposed to said second medium; the signal outputs of said transducers being connectable to a processing unit for determining and measuring changes in the heat flow between said first and said second mediums.