Breckland Scientific 2021 Catalogue

Electricity & Electronics

Electricity Generation & Transmission

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1 HYMAN FIRE PISTON MK2 demonstrates the rise in temperature when a fixed mass of gas is compressed. A portion of tinder is ignited when the contained air is compressed by the piston. Also demonstrates the need for oxygen by attempting to re-ignite the tinder. It will only occur if fresh air is introduced to the cylinder. By compressing the air inside the cylinder and suddenly decompressing it, you will lower the temperature and condense the water vapour inside the cylinder to form a cloud. The new and improved Mk2 boasts a more robust construction. Cat No. Description Price Per HEC-300-100 Hyman Fire Piston Mk2 31.52 ea. HEC-300-150 Spare Cylinder for Mk2 7.11 ea. HEC-300-200 Tinder 4.92 ea. HEC-300-250 Lubricant 1.65 ea. 2 LEMON CLOCK Simply add your own lemon to turn this kit into an amazing lemon powered clock. Supplied with two metal rods consisting of copper and zinc and an LCD clock. Cat No. Description Price Per HEC-400-100 Lemon Clock 4.95 ea. 3 LASCELLS LEMON LED A low powered LED comes securely contained within a robust tube for protection. Suitable for use with lemons as ‘batteries’. Zinc and copper pieces for connections are not included but are available separately. Crocodile clips, leads and lemons not included. Cat No. Description Price Per HEC-415-100 Lemon LED 4.74 ea. 4 THERMISTOR INVESTIGATION - BASIC This apparatus contains a negative temperature coefficient (NTC) bead thermistor enclosed within in a glass tube. Electrical connection is made via 4mm sockets at the top of the unit. Students can investigate the characteristics of a thermistor, usually by measuring the resistance of the thermistor at different temperatures with a multimeter or other meter. The device has a nominal resistance of 4.7KΩ at 25°C. At 0°C this resistance would rise to about 15KΩ and at 100°C the resistance would drop to around 300Ω. Instructions and example results are included. Cat No. Description Price Per ELR-700-100 Thermistor Investigation - Basic 16.48 ea. 5 LASCELLS THERMISTOR SYSTEM This apparatus contains an NTC bead thermistor with a nominal resistance of 4.7kΩ in a glass tube with electrical connection made by means of 4mm flying leads. Students from KS3 to Post-16 can carry out practical investigations into thermistor characteristics. Full instructions and specimen results included. Cat No. Description Price Per HTC-365-100 Thermistor System 25.52 ea.

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Hyman Fire Piston

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Lemon Clock

Lemon LED

Resistors & Resistance

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Thermistor System - Basic

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Thermistor System

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