Large-area, high-sensitivity heat-flow sensor

Abstract
A heat-flow sensor based on ac resistance thermometry and utilizing synchronous detection is described. The sensor design permits large-area sensors to be constructed economically. Calibration of an initial 0.09 m2 prototype yielded a linear response with a sensitivity of (37.610.01) mV(W/m2)−1. The minimum detectable heat flux is no larger than 0.08 W/m2.

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