• A rapid sequence of sparks can be generated by lowering the system’s capacitance.
• The discs are supported in two rigid upright supports, rotating in opposite directions with a hand crank. 
• Substantial opposite charges which are deposited in the capacitors and on metal spheres. 
• Consists of two high resistance plastic disks of diameter 25mm approximately, with equally spaced metal sectors. 
• Provided with a system of induced charge collecting brushes, adjustable ball-ended electrodes and cylindrical Leyden jar capacitors for obtaining higher potential.  
• Mounted on insulated wooden base.

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• Consists of three copper plates suspended from a bakelite cover of a plastic jar. 
• Outer two electrodes acting as double anode are connected to one binding post on the top. 
• The third inner copper plate fixed to another binding post acts as a cathode and can easily be removed for weighing.

The LED array indicates not only positive or negative charge, but also its size. The external voltmeter sockets allow for quantitative measurements. Very quick and easy to setup, the Science Lab Export E-Field Detector is a benefit for specialist and non-specialist teachers alike and is so easy to use that students could gather data themselves.
The Science Lab Export E-Field Detector provides a new and novel way to demonstrate charge. This highly sensitive electronic device is an essential piece of equipment in the Physics teachers’ armoury as it can detect very small charges and their polarity, as well as charge at a distance.
The comprehensive instructions include both traditional experiments that benefit from the use of the Science Lab Export E-field Detector along with new exciting ways to look at charge. This makes difficult concepts more understandable and engaging for the students.
Until now, in the school science lab, it has only been possible to demonstrate opposite and like charges by repulsion and attraction experiments or the very delicate Gold Leaf Electroscope. This unique, robust piece of equipment allows the Physics teacher to clearly show whether a positive or negative charge has been created and in which directions the electrons have moved.
This is a real game changer in the subject of electrostatics.
24V AC-DC Adapter included.

Input Voltage: 24V DC
Display Resolution: Hi sensitivity min. resolution 6pC; Lo sensitivity min resolution 0.6nC
Current Draw: 50mA
Display Range: Hi sensitivity 6 – 125pC; Lo sensitivity 0.6 – 12.5nC
Socket Output Range: 0 – 4.7V equivalent to Hi sensitivity 0 – 470pC; Lo sensitivity 0 – 47nC
Weight: 252g
Dimensions: L x W x H: 145 x 100 x 50mm 

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An internal mechanism disconnects the output when the voltage setting is changed ensuring that the switch contacts are protected from overload and the unit can be locked at any setting by means of an Allen screw located on the front panel.
A traditional switched power supply which uses established to provide a smoothed power supply suitable for all laboratory applications which require a rugged source of emf at either AC or DC.
As with all Revolution Power Supplies the unit is housed in a robust powder coated case with integral carrying handle and is sized such that 4 can be carried in a single storage tray.
Over current protection is by means of a front panel thermal trip.

OUTPUT CURRENT: 5A max 4A continuous
VOLTAGE LIMITER: Front panel Allen key insert
Switched INPUT: 230/240V a.c. 50Hz
CURRENT PROTECTION: Thermal circuit breaker. Manual reset
OUTPUT VOLTAGE: 0 to 12V d.c. in 2V increments capacitor smoothed.
0 to 12V a.c. in 2V increments

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Maximum voltage limiter. Use an Allen key through the front panel to set the dial to the highest voltage you want your students to use. The main control will then work as normal up to this value but if a higher voltage is tried there will be no increase.
Regulated DC output. Set the voltage to the value required as displayed on the built-in panel meter and the supply will maintain this no matter what you connect to the terminals.
Digital panel meter showing the DC output being used at all times
Automatic over-current protection. If more than 8A is used the output voltage reduces to zero. Normal output is restored once the current is reduced. No resetting required.
Additional AC 6V and 12V (unregulated) are provided at 1.5A max for AC work such as transformer investigations. This can be used in parallel with the DC output.
Robust, powder-coated steel case with integral plastic handle and removable mains lead
Clear simple controls with illuminated front-panel mains switch
Switched or Variable. The same quality and facilities are available as either continuously variable DC. or switched output. Whichever you prefer.
Compact design. Easy to store, easy to carry around, more space left on the bench. At only 2.2kg each and measuring only 125 x 175 x 230mm four supplies will fit in a single storage tray. A real space saving solution.

VOLTAGE LIMITER: Front panel Allen key adjust.
CURRENT PROTECTION: Electronic automatic d.c. Thermal automatic a.c.
INPUT: 90-265V a.c. 50/60Hz
Max ripple at full current 300mV
6V and 12V a.c. unregulated.
OUTPUT VOLTAGE: 0 to 15V d.c. continuously variable
Fully smoothed and regulated
Max voltage variation with load current 2%
OUTPUT CURRENT: 8A d.c. max. 6A continuous 1.5A a.c. max.
DISPLAY: Digital output d.c. only.

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Regulated DC output. Set the voltage to the value required as displayed on the built-in panel meter and the supply will maintain this no matter what you connect to the terminals.
Digital panel meter showing the DC output being used at all times
Switched or Variable. The same quality and facilities are available as either continuously variable DC. or switched output. Whichever you prefer.
Compact design. Easy to store, easy to carry around, more space left on the bench. At only 2.2kg each and measuring only 125 x 175 x 230mm four supplies will fit in a single storage tray. A real space saving solution.
Robust, powder-coated steel case with integral plastic handle and removable mains lead
Clear simple controls with illuminated front-panel mains switch
Automatic over-current protection. If more than 8A is used the output voltage reduces to zero. Normal output is restored once the current is reduced. No resetting required.
Maximum voltage limiter. Use an Allen key through the front panel to set the dial to the highest voltage you want your students to use. The main control will then work as normal up to this value but if a higher voltage is tried there will be no increase.
Additional AC 6V and 12V (unregulated) are provided at 1.5A max for AC work such as transformer investigations. This can be used in parallel with the DC output.

Max voltage variation with load current 2%
Max ripple at full current 300mV
INPUT: 90-265V a.c. 50/60Hz
OUTPUT VOLTAGE: 0 to 15V d.c. continuously variable
VOLTAGE LIMITER: Front panel Allen key adjust.
Fully smoothed and regulated
6V and 12V a.c. unregulated.
CURRENT PROTECTION: Electronic automatic d.c.
Thermal automatic a.c.
DISPLAY: Digital output d.c. only.
OUTPUT CURRENT: 8A d.c. max. 6A continuous
1.5A a.c. max.

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These digital bench meters are housed in robust ABS and PVC cases. Both feature ~50 minute ‘auto off’ circuitry to conserve battery life and an LED indicator prompting battery change when necessary.
Spend Less time changing batteries with bench meters.

Voltmeter:
ACCURACY: ± 2%
INPUT IMPEDANCE: 10MΩ Approx.
RANGE: 0 to ± 20V d.c.
RESOLUTION: 0.01V
POWER: 9V PP3 Battery

Constructed from:
PVC, ABS, Acrylic

Dimensions: 110 × 100 × 70mm, 250g

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• This is a small-scale wind tunnel with an electric fan and adjustable air flow control, with eight different experiment modules that demonstrate key principles and phenomena of air flow.
• It is the essential base unit for eight different experiment modules that demonstrate key principles and phenomena of air flow.
• The unit consists of a sturdy steel framework on which is mounted a fan which supplies air via a flow-control valve to a specially designed plenum chamber and aerodynamically shaped contraction.
• Pressure measurement connections use reliable quick-release couplings. 
• Both of these features make the changeover from one experiment to another simple and quick.
• The bench format of the equipment makes it compact, easy to move and store. 
• Each of the experiment modules fits either to the plenum chamber or to the contraction. 
• The air then exits the experiment module through the bench top and emerges at an exhaust at the rear of the unit.
• When smoke is used in experiments for visualisation purposes users can fit flexible ducting to the exhaust to direct waste smoke safely away
• Also has handy shelves and storage space which is ideal to store experiment modules when they are not in use.

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