Breckland Scientific 2023 Catalogue

Heat & Energy

Thermal Conductivity

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1 CONDUCTIVITY APPARATUS Designed to show how different materials conduct heat at different rates, this apparatus comprises four metal strips, one each of copper, iron, aluminium and brass, fixed to a frame at 90 degrees to each other, with the strips almost touching at the centre of the frame. The outer ends of the strips have small recesses for holding paraffin/candle wax. As the four strips are heated at the centre, the wax melts at different rates, demonstrating the relative difference in thermal conductivity. Alternatively, drawing pins or marbles can be set into wax in the recesses and the apparatus turned upside down before heating, so that the embedded objects can be seen to fall as the wax melts. CARE: Some of the metals have melting points lower than the temperature of a hot (blue) Bunsen flame, so heating of the metal strips should only be done moderately. Cat No. Description Price Per HTC-050-100 Conductivity Apparatus 7.85 ea. 2 CONDUCTIVITY RODS Packs of conductivity rods made of various materials, for showing how different materials conduct heat at different rates. Each rod is approx. 300 long x 3mm dia. Supplied in packs of 10. PLEASE NOTE: Some of the materials have melting or softening points lower than the temperature of a hot (blue) Bunsen flame, so heating should be done gently e.g. using a very low Bunsen flame, spirit burner or tea light, or by placing the ends of the rods in hot water. Cat No. Description Material Price Per HTC-100-100 Conductivity Rods Aluminium 6.97 10pk HTC-100-150 Conductivity Rods Copper 13.89 10pk HTC-100-200 Conductivity Rods Iron 5.93 10pk HTC-100-250 Conductivity Rods Brass 12.23 10pk HTC-100-300 Conductivity Rods Glass 11.25 10pk HTC-100-350 Conductivity Rods Zinc 11.31 10pk CONDUCTIVITY RODS SET 5 rods: aluminium, brass, copper, glass and iron. Size: 250 x 3mm dia. Cat No. Description Price Per HTC-150-100 Conductivity Rods Set 7.38 set 3 CONDUCTIVITY STAR For demonstrating the differences in the thermal conductivity of five different metals - brass, copper, aluminium, mild steel and stainless steel. These 5 metal rods are equally spaced around a brass hub, and have a small recess at the other end for holding paraffin wax. The brass hub has a metal rod and insulating handle. On heating the central hub, the wax contained in the cavities of different metals melts at different times, showing their different thermal conductivities. Cat No. Description Price Per HTC-200-100 Conductivity Star 15.81 ea. 4 ICE MELTING KIT - BASICICE MELTING KIT - BASIC Demonstrates the difference in conductivity of two different materials. Comprises two identical looking square blocks, but each made of different materials; one of thermal conducting material, the other of thermal insulating material. By placing ice cubes on both blocks at the same time, it can be seen that ice melts faster on one material than the other, showing the difference in their thermal conductivities.Demonstrates the difference in conductivity of two different materials. Comprises two identical looking square blocks, but each made of different materials; one of thermal conducting material, the other of thermal insulating material. By placing ice cubes on both blocks at the same time, it can be seen that ice melts faster on one material than the other, showing the difference in their thermal conductivities. Cat No. Description Price Per HTC-250-100 Ice Melting Kit 20.49 kit

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Conductivity Apparatus

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Conductivity Rods

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Conductivity Star

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Ice Melting Kit

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