A thermocouple-based device for the measurement of average surface temperature is described. The device requires the measurement of only two emfs and yields the average temperature over the entire surface instrumented with the device. It consists of a single (normal) thermocouple and a thermopile-like element which performs the averaging. A particular use of the device is described to illustrate its utility.
Manual on the Use of Thermocouples in Temperature Measurement ASTM STP 470B, Philadelphia, PA:ASTM, p.4 (1981).
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Hust, J.G., B.J. Filla, J.A. Hurley and D.R. Smith."An Automated High Temperature Guarded-Hot-Plate Apparatus for Measuring Thermal Conductivity of Insulation Between 300 and 800 K" (to be published as an NBSIR).