Breckland Scientific 2021 Catalogue

Sound & StandingWaves

Sound

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5 STROBOSCOPE- HANDHELD A circular black disc having radial slots extending to the edge of the disc. Ball bearing mount at the centre minimises friction. With cranking handle for rotation. Cat No. Description Price Per SWA-650-100 Stroboscope - Handheld 10.83 ea. 6 STROBOSCOPE- XENON A lightweight, sturdy and compact instrument with variable flashing rate adjustment. Specifications: 60 to 18,000 RPM, 0.2 to 300Hz. External triggering signal. 230V, 50Hz. Size: 215 x 140 x 150mm. Cat No. Description Price Per SWA-670-100 Stroboscope - Xenon 283.20 ea. 2 BELL JARS Glass with a flat flange. Socket or knob top versions available. Cat No. Height Diameter Type Price Per BEL-050-100 200mm 150mm Socket Top 29/32 57.69 ea. BEL-050-150 250mm 150mm Socket Top 29/33 72.53 ea. BEL-050-200 300mm 200mm Socket Top 29/34 116.39 ea. 3 BELL IN A BELL JAR APPARATUS An acrylic bell jar, complete with pump plate, for carrying out the classic bell-in-a-jar experiment to show that sounds waves require a medium in order to be transmitted. The pump plate is connected to a vacuum pump (not supplied) to remove the air from the bell jar, creating a vacuum. The top of the bell jar has a stopper with two metal rods to act as terminals for the electric bell (included). Cat No. Description Price Per SWA-625-100 Bell Jar Apparatus 82.15 ea. 4 LASCELLS SPACE TUBE A modern replacement for the Bell in a Bell Jar Apparatus. A 90mm diameter acrylic tube houses a battery-operated, high output piezo sounder. When the end plates are attached and the unit evacuated using a vacuum pump, no sound can be heard; but the sound returns when the air is allowed back in. An effective demonstration with none of the complications of the traditional apparatus. Overall length 150mm. Requires a vacuum pump. Cat No. Description Price Per SWA-635-110 Space Tube 50.77 ea. 1 PUMP PLATE For use in the classic ‘Bell in Vacuum’ experiment. This high quality unit has a sealing ring, is mounted on a tripod, has a hose connection on the pump-side, and a ventilation port. Includes two-pole current feed via 4-mm safety sockets, a cable of approximately 1m length with 4mm safety plugs, plus a central bore with M12 thread for attaching experimental equip- ment. • Size: 250mm (Dia.) x 90mm (H) • Electrical limit specs.: max. 48v, max. 12A • Vacuum connection: 2 hose nozzles 12mm and 8mm dia. Cat No. Description Price Per SWA-620-100 Pump Plate 220.16 ea.

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Pump Plate

Bell Jar

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Lascells Space Tube

Bell in a Bell Jar Apparatus

Related Products... For vacuum pumps see page 375 - 376

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Stroboscopes

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Stroboscope - Handheld

Stroboscope - Xenon

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