Patent ID: 7154077

Claim:
A device for measurement of at least one of power and energy from a defined external source, the device comprising: (a) a housing, said housing defining an internal cavity and having an aperture in fluid communication with an external environment; (b) a first temperature sensor, said first temperature sensor positioned in said internal cavity of said housing in line with said aperture so that the energy from the defined external source is applied to a surface of said first temperature sensor when the energy is directed through said aperture, said first temperature sensor producing a first output signal; and (c) a second temperature sensor, said second temperature sensor positioned in said internal cavity of said housing so that only ambient energy from sources other than the defined external source is applied to a surface of said second temperature sensor, said second temperature sensor producing a second output signal; wherein subtraction of said second output signal from said first output signal produces a corrected output signal, said corrected output signal more accurately defining the power or energy from the defined external source than said first output signal.