Timstar
Orbit Orrery
This hands-on model with teaching guide helps pupils understand the solar system including its shape, the sun as the source of its light, planetary orbits, the planets' names and which planets may be seen on given days. Requires 2 x AA batteries to light the sun. Height 100 mm. Diameter of largest Orbit 380 mm.
249.01 AED
""Proton"" Demonstration
This item is designed to demonstrate the stabilizing effect of neutrons on the atomic nucleus. The ""protons"" are made of disc magnets while the ""neutrons"" are made of browned iron discs. The ""protons"" will, because they are magnetized, repel one another when placed on flat surface or overhead projector. The stabilizing effect of the ""neutrons"" is illustrated by placing them between the ""protons"", thereby eliminating the repulsive force. The ""protons"" are supplied with red marking, the ""neutrons"" with blue. Supplied as single pieces.
The “neutron” can be ordered under product code MO150905.
13.83 AED
""Neutron"" Demonstration
This item is designed to demonstrate the stabilizing effect of neutrons on the atomic nucleus. The ""protons"" are made of disc magnets while the ""neutrons"" are made of browned iron discs. The ""protons"" will, because they are magnetized, repel one another when placed on flat surface or overhead projector. The stabilizing effect of the ""neutrons"" is illustrated by placing them between the ""protons"", thereby eliminating the repulsive force. The ""protons"" are supplied with red marking, the ""neutrons"" with blue. Supplied as single pieces.
The “proton” can be ordered under product code MO150900.
21.74 AED
Radioactive Source Handling Tongs
Custom designed tongs for handling the radioactive sources RA95622 RA95626. Stainless steel construction. Dimensions (W x L): 12 x 165 mm.
130.04 AED
Geiger Muller Counter, PC Communication Lead
Interface lead to link GM counter RA67530 to PC or laptop.
373.51 AED
Frederiksen Spark Detector
The Alpha particle Spark Detector from Frederiksen has been developed to enable visualization of alpha particles. The apparatus can be likened to a GM tube, but using atmospheric air instead of the diluted quenching gas in the tube.
When alpha particles ionize the air in the spark gap of the detector, bright sparks can be both seen and heard. The apparatus incorporates a transparent lid, which allows clear observation of the sparks.
The detector requires connection to safe high voltage (EHT) power supply with voltage range of 0-5 kV or 0-6 kV. The apparatus can be safely used directly on bench top or table and includes a removable threaded steel rod for mounting the unit on a radioactivity bench (RA95610) or squat retort base with thumbscrew (ST96274).
• Gives clearly visible and audible response to alpha radiation
• Demonstrates the ionization of air by alpha particles
• Detects alpha radiation from radioactive minerals or radioactive sources
• Allows study of range in air shielding by different materials
1304.33 AED
Geiger-Muller Counter
This GM counter is the most versatile and easily operated model yet. The counting time can be set to 1, 10, 60 or 100 seconds or set to manual start/stop. Counting may be set to run repeatedly and the last, complete result is displayed in the main display while new counts accumulate in the auxiliary display. The counter accepts both BNC and Jack type GM tubes. With the optional USB connection it can interface with computer and if pulse output for further hardware processing is required, that is also available. For demonstration purposes the authentic clicking Geiger-counter sound may be turned on if preferred. Other improvements over the previous model include lower overall system dead time and lower current consumption, with the unit now being powered by AA batteries. The counter may also be powered from the optional mains adapter.
3735.11 AED
Geiger-Muller Tube - BNC
A multipurpose GM tube, sensitive to alpha, beta and gamma radiation. Mounted in housing with protective cover and 10 mm diameter support rod.
It is complete with integral lead and BNC connector. This GM tube does NOT have built-in anode resistor, and therefore requires counter with built-in anode resistor. Suitable for use with RA67530.
• Window diameter: 9.14 mm
• Recommended bias voltage: 500 V
• BNC plug
1343.85 AED
Half Life Simulation
This pack of 500 x 10 mm plastic cubes is used to investigate and demonstrate half-life. Each cube has one black face, the other faces all being yellow. The cubes are thrown or scattered like dice and those which land with the black face uppermost represent radioactive nuclei which have decayed. The black upward facing cubes are then removed, the remaining cubes thrown again and the process repeated. The removed cubes represent radioactive decay and decay curve can be plotted from the results.
393.27 AED
Geiger-Muller Tube, Extra Sensitive - BNC
This extra sensitive GM-tube has a large window which makes the detector well suited for measuring low activity sources. This provides more counts and thus improves counting statistics for more accurate determinations of half-lives, etc.
The GM-tube housing is supplied with a protective cover as well as a protective grid in front of the window. It is sensitive to alpha, beta and gamma radiation.
It is complete with a removable protective cap, holder, and integral lead with BNC plug. This GM tube does NOT have built-in anode resistor, and therefore requires counter with built-in anode resistor. Suitable for use with RA67530.
• Useful diameter: 28.6 mm
• Recommended supply voltage: 500 V
• BNC plug
2648.18 AED
Holder for Extra Sensitive GM Tube
Fitted with a 10 mm diameter mounting rod, so the GM-tube may be held safely in the squat retort base.
157.70 AED
Alpha Particle Scattering Apparatus
A low cost apparatus for the demonstration of Rutherford scattering by means of gravitational analog of inverse square law repulsion. Comprises wooden launching ramp with guiding groove running down its curved front face along its length and index marks at 40, 60, 80 and 100 mm height above the base, that provides pre-determined launching heights. Also included is spun aluminium hill along with 19mm diameter steel ball. The shape of the aluminium hill has been carefully determined by varying its height above the base line by an amount arrived on the basis of the reciprocal of the radius. Ramp Dimensions (L x W x H): 300 x 50 x 105 mm. Hill Dimensions (Dia. x H): 280 x 60mm.
456.51 AED
Spark Discharge Apparatus
An instrument useful in showing the random nature of radiation, it produces spectacular bright sparks when alpha particles are ionised between the electrically charged circular wire grid and steel electrode. It comes complete with a sliding holder for an alpha radiation source, an accurate scale to measure the effects of distance between the source and the grid and is built in vacuum formed black plastic case. All of the electrical connections from an EHT power supply are through 4 mm insulated sockets. Connections to Timer Scaler and Frequency Meter are via BNC to BNC cable. Requires 5kV EHT power supply and alpha radiation source. Weight: 400g. Dimensions: (L x W x H) 310 x 77 x 85 mm.
2189.69 AED
Radioactivity Bench Kit
A bench for radioactive sources and GM-tubes, providing stable and convenient setup, allowing reproducible results when making experiments with radioactivity. Investigate how the radioactive radiation spreads from the source in both angle and distance or investigate how radiation is absorbed by lead and aluminium.
The bench is 60 cm in length, with a millimetre scale. Two riders are included, one for carrying a GM-tube, and the other for carrying the source holder*.
The source holder can be fitted with a 6 mm diameter steel rod, for hanging absorber plates in front of the radioactive source. It can be rotated, and is fitted with degree scale ±110° - 1°
• Lead plates: 5 x 2 mm thick, and 10 x 1 mm thick (enamelled to protect from lead contamination)
• Aluminium plates: 6 x 2 mm thick, and 4 x 0.5 mm thick
*Please note: This holder is only suitable for use with Frederiksen radioactive sources, which are available by special request only. The sealed radioactive sources can be used instead, with some limitations, using RA170800 source holder.
2055.30 AED
Scaler Timer Frequency Meter
A multi-purpose instrument, combining the functions of a multi-purpose timer, ratemeter and frequency meter in one compact unit. It can be used as a simple stopwatch to more sophisticated applications such as dynamics experiments with air tracks etc. The scaler and ratemeter modes allow numerous radioactivity experiments to be undertaken. It has four, 7-segment LED digits 13 mm high. The high brightness and large size display make it ideal for classroom demonstrations. The microprocessor based design minimises the number of controls required and these are clearly labelled so that the instrument is very straightforward to use.
The GM tube input is a TNC socket, TNC-to-BNC adaptor is required for connecting GM tube with BNC plug.
Timer Four Auto Ranges:
0 to 9.999 s, 10 to 99.99 s, 100 to 999.9 s, 1000 to 9999 s
Scaler Three Auto Ranges:
0 to 9.999 1000 counts, 10 to 99.99 1000 counts, 100 to 999.9 1000 counts
Accuracy: ±0.01%
Sensitivity: 160 mV peak
Ratemeter Three Auto Ranges:
0 to 9.999 1000/s, 10 to 99.99 1000/s, 100 to 999.9 1000/s
Frequency Meter Three Auto Ranges:
0 to 9.999 kHz, 10 to 99.99kHz, 100 to 999.9 kHz
Max Input Signal: 20 rms
Max Sensitivity: 250 mV rms
Range: 10 Hz to MHz
2805.88 AED
Electron Diffraction Tube
The electron diffraction tube is highly evacuated tube with an electron gun consisting of pure tungsten heater filament and cylindrical anode all contained in clear glass bulb. The electrons emitted by the heated cathode are constrained to narrow beam by an aperture and are then focussed by means of an electron-optical system. The resulting tight, monochromatic beam then passes through micro-mesh nickel grating situated at the aperture of the gun. Onto this grid, thin layer of polycrystalline graphitised carbon has been deposited by vaporisation. This layer affects the electrons in the beam much like diffraction grating. The result of this diffraction is seen in the form of an image comprising two concentric rings that become visible on the fluorescent screen. spot resulting from the un-deflected electron beam continues to be visible at the centre of the rings. Also requires an EHT power supply.
Specifications:
• Max. filament voltage: 6.3 V AC
• Max. anode voltage: 5 kV
• Anode current: approx. 0.1 mA at 4 kV
6916.88 AED
Fine Beam Tube (Neon-Filled) with Connector Base
The Fine Beam Tube is used for investigating the deflection of cathode rays in uniform magnetic field produced by pair of 300 mm Helmholtz coils. In addition, it can also be used for quantitative determination of the specific charge of an electron e/m.
Located inside glass bulb with neon residual gas atmosphere is an electron gun, which consists of an indirectly heated oxide cathode, Wehnelt cylinder and perforated anode. The gas atoms are ionised along the path of the electrons and narrow, well-defined, luminescent beam is produced. Incorporated measurement marks facilitate parallax-free determination of the diameter of the circular path of the beam deflected in the magnetic field. The Fine Beam Tube is mounted on base with coloured connectors. In order to protect the tube, protective circuit is built into the base, which shuts off any voltage in excess of the base's pre-set cut-off voltage. The protective circuit prevents excessive voltages from damaging the heater filament and ensures ""smooth"" switch-on response once the voltage is applied. Requires 0-300 DC power supply and 300 mm Helmholtz coils.
• Filament voltage: to 12 DC
• Filament current: 300 to 450 mA
• Anode voltage: 200 to 300 V
• Anode current: 0.3 mA
• Diameter of fine beam path: 20 to 120 mm
• Division spacing: 20 mm
• Tube diameter: 160 mm
• Total height incl. base: 260 mm
• Base plate: 115 115 35 mm
• Weight: approx. 820 g
8300.25 AED
Helmholtz Coils for Use with Fine Beam Tube
The Pair of Helmholtz coils is used for generating homogeneous magnetic field and for the determination of the specific charge of the electron e/m in conjunction with the dual-beam tube. The coils can be switched in parallel or in series. spring clip on the top crossbar is used to mount the Hall sensor during measurements of the magnetic field.
The maximum field strength generated by the coils (~ mT) is approximately 750 times weaker than that produced by an MRI machine (~3 T), which are known to be safe for use by people with medical implants such as pacemakers. For use with RA130505.
Requires 0-20 DC A power supply.
• Coil Dimensions (Dia.): 300 mm
• Coil spacing: 150 mm
• Number of turns per coil: 124
• DC resistance: 1.2 ohms each
• Maximum coil current: 5 A
• Maximum coil voltage: 6 V
• Maximum flux density at 5 A: 3.7 mT
• Weight: 4.1 kg approx.
4150.13 AED
Teltron Dual Beam Tube
The dual beam tube can be used to determine the specific charge e/m from the diameter of the path followed by electrons fired into the tube from perpendicularly mounted gun with vertically aligned magnetic field and observation of the spiral path followed by electrons fired axially into coaxial magnetic field.
The dual beam tube is partly evacuated electron tube, filled with helium at low pressure and equipped with both axial and perpendicular electron guns. The electron beams are perpendicular to one another and common deflector plate is provided for both guns. The electron beam source is an oxide cathode heated indirectly via heating coil.
The electron paths show up as fine, slightly greenish beam due to impact excitation of the helium atoms. Requires 300 or 500 DC power supply.
• Filament voltage: max. 7.5 AC/DC
• Anode voltage: approx. 150 V DC
• Max Anode current <30 mA
• Deflector voltage: max. 50 V DC
• Glass bulb: 130 mm dia. approx.
• Total length: 260 mm approx.
6719.25 AED
Teltron Universal Stand
For mounting all demonstration tubes and the optical equivalent. The tube holder consists of powder-coated cast aluminium with clamping fork made of heat resistant plastic and rotatable by 360°. The base plate contains two boreholes for mounting demonstration Helmholtz coils. Including an anti-skid support with three rubber feet. Weight: 1.5 kg. Supplied without tube. Dimensions 230 x 175 x 320 mm (L x W x H).
2411.03 AED
Helmholtz Coils
Pair of Helmholtz coils for generating a uniform magnetic field perpendicular to the axis of the Teltron D series tubes. Teltron Tube Holder D allows the coils to be configured in the Helmholtz geometry or to produce magnetic fields aligned vertically, or coaxial, with respect to the tube axis. The maximum field strength generated by the coils (~ 10 mT) is approximately 300 times weaker than that produced by an MRI machine (~ 3T), which are known to be safe for use by people with medical implants such as pacemakers.
Specifications:
Number of turns: 320
Max. continuous current: 1.0 A
Max. momentary current: 10 min @ 1.5 A; 3 min @ 2 A
Effective impedance: 6 Ω
Max. field strength: approx. 10 mT
Connectors: 4-mm sockets
3027.62 AED
Maltese Cross Tube
For demonstrating the straight propagation of electron beams in field-free spaces by projecting the shadow of Maltese cross on fluorescent screen. Also intended for observing the focusing of electron beams by magnetic fields as an introduction to electron optics. The lower section of the maltese cross has hole 3 mm dia. which makes it possible to ascertain the orientation of the cross's shadow under the influence of magnetic fields.
Specifications
Max. filament voltage: 6.3 V AC
Max. anode voltage: 5 kV
Anode current: approx. 0.1 mA at 4 kV
To perform experiments using the Maltese cross tube, the following equipment is also required:
•1 Tube holder (RA67550)
and
•1 High voltage power supply 5 kV (115 V, 50/60 Hz) or 1 High voltage power supply 5 kV (230 V, 50/60 Hz)
•1 Coil from Helmholtz pair of coils (RA67560)
•1 DC Power Supply 20 V, 5 A (115 V, 50/60 Hz) or 1 DC Power Supply 20 V, 5 A (230 V, 50/60 Hz)
•1 Bar magnet
4735.10 AED
Deflection E-M Tube
Highly evacuated electron tube with focusing electron gun and fluorescent screen inclined relative to the beam axis, so that the path of the beam can be seen and the effects of electric and magnetic fields can be studied. The electron beam can be deflected electrically in the electric field of the built-in plate capacitor, and magnetically by using a Helmholtz coil pair D. By adjusting the electric field so that it cancels the magnetic deflection, it is possible to determine the specific charge e/m and the velocity of the electrons.
Specifications:
Filament voltage: 6.3 V AC
Max. anode voltage: 5000 V
Anode current: approx. 0.1 mA at 4000 V
Max. capacitor voltage: 5000 V
Fluorescent screen: approx. 90x60 mm²
Glass bulb: approx. 130 mm dia.
Total length: approx. 260 mm
6711.35 AED
Perrin Tube
For demonstrating the evidence of the particular nature of cathode rays, establishment of negative sign of charge, the ""electron"" as an atomic particle, concept of ""time-base"", operation of cathode ray oscilloscope, simple Lissajous' figures. The diode gun, tungsten wire ""hairpin"" filament and cylindrical collimating anode, projects narrow beam of cathode rays into the evacuated experimental zone. This beam traverses the sphere to impinge on the luminescent screen in spot about 4 mm in diameter. The narrow beam may be deflected in vertical plane to enter the Faraday cage by using Helmholtz Coils. further and horizontal deflection can be obtained using an Auxiliary Coil, thereby constructing simple cathode ray oscilloscope. All connections are made on the Universal Stand.
Specifications
Max. filament voltage: 6.3 V AC
Max. anode voltage: 5 kV
Max. capacitor voltage: 500 V
Anode current: approx. 0.1 mA at 4 kV (anode)
4822.05 AED
BNC to TNC adaptor lead
Allows GM tube with BNC plug to connect to Scaler Timer Frequency Meter with TNC socket.
188.14 AED
Demonstration Dynamo, DC
This demonstration model facilitates the understanding of how dynamo works, thanks to the open and exposed design. A mounted armature, comprising two coils of copper wire, is rotated about horizontal axis by turning the hand cranked drive wheel within magnetic field, created by the permanent U-magnet supplied with the unit. Mounted on plastic base with LED and two mm sockets for connection to measuring instruments. Drive Wheel Dimemsions (Dia.): 140 mm. Base Dimensions (W x L): 150 x 200 mm.
274.30 AED
Motor/Generator Unit
This unit can be used for variety of purposes to illustrate energy transfers: it can be used to lift mass or stretch bungee cord, and to generate an electrical current when the mass falls again or the bungee cord is released. It can also be turned by hand to generate current. The motor/generator (6-9 V) is mounted on robust metal base, and the gearing of the unit and the sizes of the pulleys have been chosen to enable variety of qualitative and quantitative experiments to be undertaken.
471.93 AED
Demonstration Dynamo AC/DC
A hand driven pulley coupled to the smaller dynamo pulley by a rubber belt to give step-up ratio, to generate both AC and DC. Electrical output is via 2 pairs of 4 mm sockets (AC and DC) and two LEDs.
501.97 AED
Eddy Current/Lenz's Law Kit
This kit consists of two tubes (one copper, one plastic) and two discs (a supermagnet and an aluminium disc of similar size). When the supermagnet is dropped down the copper tube, it falls much more slowly than might be expected. The other tube/disc combinations do not show this effect, since eddy currents are only produced using the copper tube and the supermagnet. Tube Dimensions (L): 250mm.
157.70 AED
U-Shaped Electromagnet
Designed for student experiments in electromagnetism, this U-Shaped Electromagnet encourages students to discover and learn the relationship between electricity and magnetism. Requires standard laboratory power supply, maximum voltage 12 V DC. Weight: 0.3 kg. Dimensions (W x L xD): 100 x 150 x 50 mm.
106.32 AED
Variable Electromagnet Investigation
This apparatus is used to study the effect of number of coils on the strength of an electromagnet. The effect of current on strength of the electromagnet can also be studied. The electromagnet coil has 4 mm sockets and tappings at 100, 200, 300, 400, 500 and 600 turns. A hook on the underside allows paper clips to be attached to indicate the strength of the electromagnet for each variable. A low voltage laboratory power supply is also required.
419.76 AED
Relay Demonstration
The Relay Demonstration Unit allows the investigation and study of how a relay functions, in a clear and practical manner. A useful property of this unit is that the circuit powering the coil is easily seen to be completely separate from the circuit switched on by the relay. This is one of the reasons relays are used where safe low voltage circuit can be used to control high voltage circuit.
When current flows through the coil an electro-magnetic field is produced. This field attracts the iron armature whose end makes the contact, completing the circuit and illuminating the lamp. When the current is switched off, the contact will open again, switching the circuit off.
Specifications:
• Control input voltage: 2 V DC
• Switched supply voltage: 12 V Max
237.15 AED
Electric Bell Demonstration
All the components of an electric bell are mounted on a large panel. All wiring is visible and parts are large in size. Operates on 3-4 volts DC
237.15 AED
Electromagnet Kit
To demonstrate the relationship between magnetism and electricity. Soft iron U-shaped core and keeper with hook. Dimensions (H x Dia.): 110 x 9 mm.
124.11 AED
Soft Iron Rod
Useful for cores of electromagnets as soft iron loses its magnetism when the current in the coil is switched off, whereas steel retains some magnetism after the current is switched off. Dimensions (L x Dia.): 200 x 12 mm.
32.41 AED
Magnetising and Demagnetising Coil
For magnetising and demagnetising ordinary magnets, iron bars etc. Consisting of 250 mm long solenoid wound with insulated copper wire mounted on base with switch and 4 mm terminals. Operating voltage 12 V AC or DC at 6 A. Magnetising by AC or DC. Demagnetising by AC.
384.18 AED
Floating Globe
The globe is suspended from an electromagnet. This makes the friction very low and the earth will rotate at constant speed for many hours after being spun around. AC adapter included. Dimensions (Dia.): 200mm.
498.02 AED
Force on a Conductor Apparatus
A version of traditional piece of equipment for demonstrating the effect of current flowing through conductor in the presence of magnetic field. Connection is made via the 4 mm sockets attached to the side rails. When current of up to 8 A flows, the crossbar rolls one way or the other under the action of the electro-magnetic force. With clearly labelled poles to the magnet it is easy to demonstrate Fleming's Left Hand Rule.
513.43 AED
Current Balance (BIL Coil)
This current balance apparatus (BIL coil) consists of a printed circuit board coil mounted on a support handle. The board has 2 coils one with 5 turns and one with 10 turns, rated at 2 A. The apparatus can be used to measure the force on current carrying conductor in magnetic field. permanent magnet should be placed on the pan of digital balance (a yoke with 2 ceramic magnets will work) and the BIL coil mounted in vertical plane between the magnets. When connected to low voltage power supply and ammeter, the balance will be deflected and the new reading can be taken. The force on current carrying conductor and field strength can then be calculated.
105.93 AED
Demonstration Motor
This demonstration motor comes ready assembled, with an open construction which clearly shows the design working parts of a simple motor. The motor is mounted on a robust wooden base with acrylic end plates with 4mm sockets and comes complete with ceramic magnets and yoke. Requires 1 -3 Volt DC laboratory power supply (not included). Overall Dimensions (L x W x H): 125 x 75 x 60 mm.
513.43 AED
Motor Kit
This self assembly motor kit is very robust and clearly demonstrates the constituent parts of DC motor.
236.75 AED
Demonstration Electric Motor
A model of the simplest form of DC electric motor, having 2-pole armature wound with enamelled copper wire, and permanent magnetic field provided by removable bar magnet. The construction of the model is completely open and all components are readily observable. A disc-type commutator is incorporated and external connection to the phosphorous bronze bushes is by means of a pair of 4 mm sockets. The motor operates on 6-8 V DC.
228.85 AED
Fleming / Pohl Swing (Oersted's Law Apparatus)
For demonstration of the force on current carrying wire in magnetic field. 270 x 100 x 160mm (H x W x D)
913.03 AED
Westminster Electromagnetic Kit
A comprehensive kit for teaching up to 8 students the various aspects of electromagnetism. Containing: Alloy magnets, ceramic magnets, steel magnets, yokes, plotting compasses, hardboard formers, iron filings, double C-cores, clips, rings and split rings, support bases, armatures, axle rods, split pins, rivets, rubber tubing, formers, reels, cellulose tape, copper wire, pasteboard, postcards, cotton, resistors, bulbs, lampholders, clamps, blocks and full instructions.
2967.54 AED
Westminster Motor Kit
Kit of parts to build six model motors as in the 'Westminster' electromagnet kit. The Motor Construction Kit enables pupils to build their own motors from scratch. By having to construct motors in this way pupils gain better understanding of the theory behind electric motors.
Contents:
• 12 'Magnadur' magnets
• 6 armatures
• 6 mild steel yokes
• 6 support bases
• 6 shafts
• 24 rivets
• 12 split pins
• 1 reel 0.6 mm PVC tinned copper wire
• 2 reels Sellotape
• 300 mm tubing, 2.5 mm bore
539.91 AED
Westminster Electromagnetic Kit, spare shafts
Shafts (axels) for Westminster Electromagnetic Kit MA91525.
90.91 AED
Westminster Electromagnetic Kit, spare rivets
Rivets for Westminster Electromagnetic Kit MA91525.
130.04 AED
Westminster Electromagnetic Kit, spare split pins
Split pins for Westminster Electromagnetic Kit MA91525.
50.20 AED
UVA Lamp & Holder
An ultraviolet lamp in high-quality housing with an aperture. The unit connects directly to the mains via an IEC lead, and the housing has an on/off switch, and screw-thread to attached mounting rod.
The unit is supplied with UVA emitting lamp. This light is not harmful to skin or eyesight.
A UVC lamp (EC180122) is available for photoelectric work.
• 11 lamp
• 350-400 nm emission spectrum
• 370 nm peak
1203.93 AED
UVC Lamp
A UVC lamp for lamp holder EC180120, suitable for experiments with the photoelectric effect.
This light is harmful, especially to eyesight. It is recommended that bare skin is covered, UV protective goggles worn, and the time the light is switched on reduced to minimum.
Specifications:
•Power: 5 W
•Wavelength: 253.7
472.32 AED
Pith Balls
These expanded polystyrene balls are used for demonstration experiments with electrical charge. 12 mm diameter.
90.91 AED
Large Needle Electroscope
This extra-large electroscope is ideal for classroom demonstrations of electrostatic principles such as conduction, induction and coulomb repulsion. light-weight metal vane is used as pointer in the electroscope. The lightweight metal blade deflects when the electroscope plate is charged. transparent scale is provided to measure the angle of the deflection. The front glass window slides up to allow insertion of ionizing material in chamber. This electroscope comes with two accessories: an electrophorus disc and spherical electrode.
Dimensions: 248 x 203 x 121 mm.
228.06 AED
Electrostatic Strips
This pack of electrostatic strips allows students to study charge in different materials for electrostatic experiments. The pack consists of 10 clear polycarbonate strips, which tend to gain positive charge when rubbed with cotton duster and 10 white polystyrene strips, which tend to gain negative charge when rubbed. Suitable for use with our brass wire stirrups.
222.92 AED
Gold Leaf Electroscope
Gold Leaf Electroscope. The 'Malvern' dual purpose gold leaf electroscope has metal plate to which single gold leaf may be attached and is supported by an insulating bush in metal case with 4mm socket earthing terminal. scale is provided for measuring the deflection of the leaf.
169.65 AED
Coulombmeter Kit
For charge detection and measurement. Useful for a wide range of experimental applications including charging by induction, Faraday's ice pails, Coulomb's law and capacitance of an isolated sphere. The 3.5 digit liquid crystal display has 13 mm high digits with wide field of view unobscured by trailing leads. The display also provides indication of polarity and low battery. The unit is exceptionally easy to read. Two colour coded 4 mm sockets are located on the sides for maximum convenience and anti-slip feet are fitted to the base. Low operating current gives expected battery life in excess of 500 hours. Housed in a robust, ABS plastic case. Supplied with charge plate, battery and instructions.
• Range:0 to 1999 nC
• Resolution: 1 nC
• Overload: 10 x full scale
• Accuracy: ±10% of full scale
• Input Resistance: 100 GΩ
• Leakage Current: 1pA (10pA max)
• Capacitance: 4.7mF
552.95 AED
Silk Cloth
A silk cloth ideal for electrostatic investigations. Dimensions (L x W): 300 x 300 mm.
35.57 AED
Parallel Plate Capacitor Kit
This Parallel Plate Capacitor demonstrates the working of capacitor; a device which allows the storage of electrical energy in the electric field created between a pair of conductors on which electric charges of equal magnitude, but opposite polarity, have been placed. The apparatus will show the dependence on capacity to the distance between the plates and the nature of the medium between them. Dielectric materials can be placed between the plates for further investigation.
363.63 AED
E-Field Apparatus
This apparatus allows visualisation of electric fields between various electrode configurations, in a similar way to how iron filings allow visualisation of magnetic fields. It is constructed from transparent acrylic, which allows it to be placed on an overhead projector for class demonstrations but can also be used on white surface for use with visualisers or for direct observation by smaller groups. In order to create electric fields large enough to influence the particles, a high voltage, low current 2-5kV EHT power supply is required. Apparatus includes electrodes, clear acrylic base with 4 mm sockets to clamp electrodes and connect power supply, petri dishes and instructions. Also requires liquid paraffin (PA4452 or PA4454 and semolina (not supplied). Base dimensions (L x W x H): 150 x 150x 65 mm.
664.02 AED
Van De Graaff Generator, Hand-Driven
A hand driven Van de Graaff generator, which is a very effective unit for introducing electrostatics. The length of the sparks generated is wholly dependent upon the speed at which the user turns the handle but sparks of around 20-30 mm are comfortably achievable. Dimensions (H Dome x Dia.): 400 x 200 mm.
869.55 AED
Van De Graaff Generator, Hand-Driven, Spare Charge Belt
Spare main charge belt for hand driven Van De Graaff, EL101544
118.58 AED
Van De Graaff Generator, Hand-Driven, Spare Drive Belt
Spare hand drive belt for hand driven Van De Graaff, EL101544
158.10 AED
Van De Graaff Generator, Premium
A top quality Van de Graaff featuring a motor or hand drive split dome to show how charge is collected in the dome. The generator uses one nylon and one Teflon roller to create double charging effect and sparks up to 10 cm. The 22 cm conductor sphere features a 4 mm socket on the top to accept accessories with a 4 mm plug. For 220/240 V. Dimensions (H x W x D): 560 x 220 x 220 mm.
Please note that Discharge Sphere is supplied separately.
4308.23 AED
Van De Graaff Generator, Premium, Spare Charge Belt
Spare charge belt for premium Van De Graaff, EL62550.
434.38 AED
Van De Graaff Generator, Premium, Spare Drive Belt
Spare drive belt for premium Van De Graaff, EL62550.
Dimensions for O-rings:
2.62 x 71.12 mm.
3.0 x 82.00 mm.
31.22 AED
Van De Graaff, Discharge Sphere
For using to discharge the Van de Graaff with sparks up to 10 cm. The polished stainless steel sphere is mounted on stainless steel rod. The base of the rod has 4 mm hole for connection to the earth socket on the Van de Graaff. Sphere diameter: 10 cm. Rod length 41 cm.
Please note: retort base not included.
426.47 AED
Van De Graaff Generator
The Generator consists of a dome supported by a pillar and rubber belt driven by an electric motor concealed in the metal base. Static electrical charge is produced by friction between this band and two rollers. The charge is removed from the belt by a metal gauze and stored in the dome. The motor is powered using mains supply (230 V). The base is fitted with a 4 mm diameter socket which can be used either for supporting a conducting sphere (fitted with cranked rod support) or for wire connection to a separate conducting sphere. cover is provided to keep the Van de Graaff free from dust when not in use.
• Diameter of Generator Dome: 220 mm
• Total Height: 500 mm
• Base (max) Dimensions: 218 x 182 x 93 mm
• Operating Voltage: 220 to 240 V AC (with 5 A cartridge fuse)
• Dome Capacitance: (approx) 15 pF
• Maximum (intermittent) current: (approx) µA
• Maximum Spark Length: (approx) 50 mm
• Diameter of Conducting Spheres: 100 mm
Supplied with accessories as shown.
2648.18 AED
Van De Graaff Generator, Spare Charge Belt
Spare charge belt for Van De Graaff Generator EL85100.
141.89 AED
Van De Graaff Accessories Kit
For demonstrating and investigating the nature and behaviour of static electrical charge. Includes; Brush of hair, Dancing balls, Oscillating sphere, Spiked arm wheel, Neon tester, Plastic comb.
564.42 AED
Calorimeter Block, Aluminium
For experiments on specific heat capacity, cylindrical with 13 mm diameter central hole to accept immersion heater and off-set hole for thermometer. Mass of each block approx. 1 kg.
143.87 AED
Calorimeter Block, Brass
For experiments on specific heat capacity, cylindrical with 13 mm diameter central hole to accept immersion heater and off-set hole for thermometer. Mass of each block approx. 1 kg.
190.51 AED
Calorimeter Block, Copper
For experiments on specific heat capacity, cylindrical with 13 mm diameter central hole to accept immersion heater and off-set hole for thermometer. Mass of each block approx. 1 kg.
239.52 AED
Calorimeter Block, Steel
For experiments on specific heat capacity, cylindrical with 13 mm diameter central hole to accept immersion heater and off-set hole for thermometer. Mass of each block approx. 1 kg.
76.68 AED
Immersion Heater
Suitable for calorimeter blocks. 50 W fully sheathed 12 V 5 A AC or DC heater with 4 mm sockets. Dimensions (Dia. X L): 12.5 x 100 mm.
173.51 AED
Copper Calorimeter, 75 mm
With parallel sides and rolled rim. 50 mm diameter x 75 mm height.
33.20 AED
Copper Calorimeter, 100 mm
With parallel sides and rolled rim. 50 mm diameter x 75 mm height.
47.43 AED
Immersion Heater, Cup Top
A novel design that fits into the top of polystyrene or paper cups. A 2.2 Ohm heating element can be powered from a low voltage supply via the 4 mm sockets in the cap. A hole in the top allows thermometer to be inserted. Ideal for energy transfer, power and specific heat experiments. Diameter: 65 mm. Height: 75 mm.
141.89 AED
Calorimeter Top, 50 mm
Insulating covers made from white PVC to fit calorimeters. Each cover has a central hole for a thermometer and a smaller hole for stirrer.
240.31 AED
Calorimeter Top, 75 mm
Insulating covers made from white PVC to fit calorimeters. Each cover has a central hole for a thermometer and a smaller hole for stirrer.
240.31 AED
Calorimeter, Copper, 75 x 50 mm
With parallel sides, rolled rim and thicker than average walls.
45.45 AED
Calorimeter, Copper, 100 x 75 mm
With parallel sides, rolled rim and thicker than average walls.
63.64 AED
Calorimeter, Aluminium, 75 x 50 mm
With parallel sides, rolled rim and smoothed internal side walls. 50 mm diameter x 75 mm height.
27.27 AED
Calorimeter, Aluminium, 100 x 75 mm
With parallel sides, rolled rim and smoothed internal side walls. 75 mm diameter x 100 mm height.
39.53 AED
Energy Transfer System: Motor/Generator
For use as driving unit /dynamo. Comprises - 6 V D.C. motor provided with 15 mm diameter 'V' pulley. Base size 15 x 10 cm.
182.61 AED
Energy Transfer System: Line Shaft Unit
For showing the conversion from electrical energy via mechanical to potential energy by winding up weight on cord. One end of the 6 mm steel shaft carries an aluminium 'V' pulley 56 mm diameter and the other end is fitted with cord anchoring collar. Base size 15 x 20 cm.
200.79 AED
Energy Transfer System: Solar Cell Motor
This is small low consumption electric motor on base specially designed to run directly from the output of the solar cell and to illustrate the direct conversion of light energy to electrical and hence to mechanical.
81.82 AED
Energy Transfer System: Solar Cell, Mounted
For use with the motor to demonstrate the production of electrical energy directly from light energy. The apparatus comprises aselenium photo-voltaic cell.
118.58 AED
Energy Transfer Unit
Developed for the Science Enhancement Programme (SEP) this single unit demonstrates range of different energy transfers; for example, how energy is transferred electrically from hand-turned dynamo to motor. The unit is accompanied by booklet that discusses some of the key teaching and learning issues that surround the energy concept, and provides series of activities that illustrate how the unit can be used to develop simple and coherent ways of talking about energy.
1541.48 AED
Hand Powered Generator (Dynamo) Set
The generator is mounted in transparent plastic housing. Using a handle and exchange gear, the generator can yield power output of up to 7.5 watts. The generator unit is supplied with an E10 socket for small bulbs and leads with mini crocodile clips for attachment to electrolysis experiments, measuring instruments, electrical circuits, etc. The set consists of two hand generator units (complete with bulb, cable and mini crocodile clips) and includes complete user instructions and a spare bulb.
249.01 AED
Stirling Engine, Low Temperature
An affordable Stirling engine which works at very low temperature differences. A cup of warm water (must be at least 60 °C) can make the motor run, which means that water heated by sunlight can become hot enough to drive this motor. Like other Stirling engines, this type works by converting temperature differences into mechanical energy as warm air expands and cold air contracts. This is utilized in closed system where the same air is pumped back and forth between cold and hot engine part.
Illustrates perfectly how Stirling engines operate and can be used with many different heat sources.
Weight: 330 g. Dimensions (H x W x D): 144 x 90 x 90 mm.
830.03 AED
Hero's Engine
A functional glass model of the earliest form of steam turbine. Comprising borosilicate glass bulb 70 mm diameter, with side arms bent at right angles and formed into jets at their tips. The bulb is carried upon a metal stand which leaves it free to rotate about its horizontal axis. With 25-30 mL of water put into the bulb and boiled, the increased pressure ejects steam, which causes rapid rotation as per Newton's third law. Supplied complete on stand but without burner.
229.25 AED