Breckland Scientific 2021 Catalogue

Heat

Thermal Expansion

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1 BALL & RING A simple and economical device for demonstrating the thermal expansion of solids. Comprises an annular brass ring and ball both mounted on insulated handles. When cold the ball easily passes through the ring, but after heating it will not. If both are heated equally, then the ball also passes through the ring. Cat No. Description Price Per HTM-050-100 Ball & Ring 7.38 ea. 2 BAR & GAUGE For demonstrating expansion of solids by heating and contraction by cooling. Comprising a metal bar mounted on rod with insulated handle, and U-shaped metal gauge with a hole to accept the bar diameter and the space between to just accept the bar length wise, when cold or when both heated to the same extent. On heating the bar, neither its length nor cross section will fit in the gauge at respective points. Cat No. Description Price Per HTM-100-100 Bar & Gauge 8.08 ea. 3 BAR BREAKING APPARATUS Demonstrating the enormous forces which can be exerted during thermal expansion or contraction. Comprising a heavy cast metal frame with U-shaped slotted end pillar to carry a stout iron bar. The iron bar is threaded at one end for a large tensioning knob and has holes at the other end to accommodate the cast iron breaking bars. Supplied complete with ten breaking bars. Cat No. Description Price Per HTM-150-110 Bar Breaking Apparatus 33.73 ea. HTM-150-150 Bar Breaking Apparatus Spare Bars 7.16 10 4 BIMETALLIC STRIP KIT Consisting of 10 bimetallic strips mounted on MDF blocks which act as insulation either from heat or electricity if used in thermostat model. Size: Strips 100 x 8 x 0.5mm Blocks 55 x 35 x 10mm. Cat No. Description Price Per HTM-260-150 Bimetallic Strip Kit 54.98 ea. 5 BIMETALLIC COMPOUND BAR To show the unequal or differential expansion of two different metals in bimetallic strips. Comprising two strips, each of different metal (Brass & Steel) of same size, riveted together end to end and fitted on an insulated handle. On heating, the compound strip bends with the metal having the greater coefficient of expansion on the concave side and other one on convex side. Returns back to its original shape on cooling. Strip is 150x20mm mounted in a wooden handle. The strip is only 1.5mm thick so that very little heat is required to produce considerable bending. Length overall 270mm. Cat No. Description Price Per HTM-200-100 Bimetallic Compound Bar 6.87 ea.

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Ball & Ring

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Bar & Gauge

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Bar Breaking Apparatus

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Bimetalic Strip Kit

Bimetalic Compound Bar

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