Demonstrates the generation of thermo emf in accordance to the Seebeck effect. Comprises a number of Bismuth mil and Antimony (Sb) couples joined together in series and mounted in an annular metal ring with insulation between them. The Bi-Sb junctions in the metal ring are arranged in the rectangular fashion forming the sensitive area that comprises only of hot junctions, the cold junctions being the thick walled metal body. Terminals provided for electrical connection. A sheet metal conical funnel has a polished inner surface to facilitate the focusing of radiant heat on to the pile junctions and is fitted over the sensitive end of the metal ring to increase the directional sensitivity and to minimize cooling of the pile junctions by extraneous air currents. The complete apparatus mounted on a stable cast metal base through a plated metal rod.
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