Range: 50-0-50mA, DC only
High quality moving coil meters. 
Colour coded with 4mm socket terminals for ease of connection.

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Centre zero universal meter (universal galvanometer) is electrically identical to the universal meter. 
The unit is ideal for use as an indicator in slow A.C.

Technical Specifications :
1000 ohm movement, moving coil, diode protection against overload up to 12V DC.
Range: 50uA-0-50uA.

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Consisting of a 16mm diameter glass tube 50cm long, fitted with two rubber bungs, and a 40cm length of tube for connection to a vacuum pump. 
Two objects with different weight and air resistance (e.g. a mass and a piece of paper or a feather) can be placed at the foot of the tube, and when inverted the objects will fall back to the bottom of the tube at the same rate - in a vacuum. 
Demonstrates that objects fall at the same speed, regardless of weight, in a vacuum. 
Further studies of the effects of air resistance can be carried out, such as timing the fall of paper through variations of air pressure in the tube, to gauge the effects of air resistance on the acceleration of an object under gravity. 

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Simple but accurate gyroscope that will run for more than five minutes once set in motion.

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A battery operated ultra violet light source suitable for Forensic Science investigations. 
Fitted with 150mm UV fluorescent tube.
Takes 4 x AA cell (not supplied). 

The Energy Transfer Kit consists of a number of separately available units which enable the user to show conversions of one form of energy to another in a variety of different ways. 
The driving and output pulleys are both 75mm diameter and the intermediate pulley 20mm diameter giving a step-up ratio of 3.75.
All units have a base measurement of 165 x 100mm and have 4mm socket terminals where appropriate.
For use in driving a dynamo, line shafts, flywheels, pumps etc. 

Comprises a 12 V bulb which acts as a heat source and 2 parabolic metal bodies, one finished in black and one in shiny metal. 
These bodies have 2 thermometer holders attached for temperature readings.
The apparatus allows demonstration for comparing heat absorption & radiation between dull and black bodies.
Instructions included.
Thermometers not included.

A novel way to investigate temperature, insulation, and body temperature. 
Heat sensitive thermochromic paper changes colour as the temperature rises, even from the heat of your hand.
Pack of 40 A4 sheets.
The paper is supplied in four colours - blue/white, purple/pink, pink/white and green/yellow.