Timstar - Science

With two clear glass faces.

This apparatus offers a clear and easy way to observe magnetic fields generated by a constant electrical current. Iron filings can be scattered on the clear surface which passes through the coil and when a current then flows around the coil, the magnetic lines of force will be shown by the alignment of the filings. The apparatus can also be used in conjunction with a magnetic field sensor and/or datalogger. Requires high current laboratory power supply (8-10 A) for best effect. Weight: 1.2 kg. Dimensions (L x W x H): 300 x 200 x 250 mm.

Solenoid - Clear base unit for bench or OHP use, to demonstrate electromagnetic fields around conductors. Available as three different models. Each mounted on base measuring L150 x W150 x H45 mm.

Vertical wire - Clear base unit for bench or OHP use, to demonstrate electromagnetic fields around conductors. Available as three different models. Each mounted on base measuring L150 x W150 x H45 mm.

Twin coils - Clear base unit for bench or OHP use, to demonstrate electromagnetic fields around conductors. Available as three different models. Each mounted on base measuring L150 x W150 x H45 mm.

A double wall tube with iron filings encased between the two layers to show 3-dimensional view of the magnetic field around the magnet. Dimensions 130 x 90mm (L x dia.).

A white frame with transparent window containing magnetic powder in a water based solution for showing magnetic field patterns. When a magnet is present the particles of iron inside become slightly magnetised, so they attract each other and cluster into the lines that show the magnetic field patterns. Includes a pair of small ferrite block magnets and a pair of plastic cased bar magnets and teachers leaflet. Size 225 x 130 x 15 mm.

A free moving magnet mounted in gimble to show the true shape of magnetic fields far better than iron filings or plotting compasses.

Iron filings in a plastic shaker, ideal for magnetic flux experiments. Size 80 mm, approx. 225 g of Iron filings.

This amazing flexible sheet 'visualizes' the direction of magnetic field lines. The sheet is coated with translucent microspheres (hollow capsules) containing very small magnetic nickel flakes suspended in an oil. The flakes inside the spheres align along the field lines when magnetic field is present. The alignment of the flakes, and thereby the magnetic field direction, is visible because of reflected light from the flakes. Useful for quality control, product demonstration, reverse engineering, and educational purposes. 300 x 300 mm, non-laminated film which is great for demonstration purposes as it can be cut to any size or shape as required, is highly flexible and can easily be wrapped around objects. good example is to wrap it around copper tube to 'view' the progress of neodymium magnet as it slowly descends through the tube. The film is also useful for viewing complex magnetic pole geometry close to the magnetic poles, although it does require fairly strong magnetic fields.

This amazing flexible sheet 'visualizes' the direction of magnetic field lines. The sheet is coated with translucent microspheres (hollow capsules) containing very small magnetic nickel flakes suspended in an oil. The flakes inside the spheres align along the field lines when magnetic field is present. The alignment of the flakes, and thereby the magnetic field direction, is visible because of reflected light from the flakes. Useful for quality control, product demonstration, reverse engineering, and educational purposes. 95 x 95 mm laminated film which is ideal for student use as it is more durable and less easy to damage. The film is also useful for viewing complex magnetic pole geometry close to the magnetic poles, although it does require fairly strong magnetic fields.

A very popular and compact Westminster power supply that is ideal for school use in Key stage 4 and 5 physics lessons with its tough steel case protected by a tough powder coated finish that will last years of use. The unit will deliver up to 16 A AC or DC through its colour coded terminal posts. This power supply is very popular for use in electromagnet experiments. •AC & DC Output: Voltages 1-2 V •Current 16 A •Voltage type - Fixed •Output type - Full wave rectified DC & AC •Mains input 230/240 V AC, 50 Hz •Supplied with mains plug and lead •Manufactured in the UK

A versatile and impressive tool for displaying field patterns on an OHP and simulating the magnetising of bar. When four plates are stacked together, they model metal bar that can be magnetised by stroking with bar magnet and demagnetised by shaking. 98 magnetic pins in each plate.

For demonstration of two and three dimensional magnetic field lines. The kit includes magnetic field box, magnetic field plate and three magnets (2 bar magnets and a horse shoe shaped magnet). The magnetic field box as well as the plate contains iron file flakes suspended in viscous liquid. In the middle of the box is placed a magnet forcing the iron file flakes to turn to display the field lines. Likewise it is possible to place a magnet on the plate to visualize the field lines. Box Dimensions: 76 x 76 x 76 mm. Plate Dimensions (W xL x D): 91 x 157 x 9 mm.

A pair of preformed coils, each with 400 turns of copper wire, wound onto former of approx. 150 mm diameter. Each coil is mounted on a support rod, which fits onto the sliders of the track system supplied. This enables the distance between the coils to be varied whilst maintaining alignment along common axis, for measurements and study of magnetic fields. Electrical connection is via 4 mm sockets. Please note: the current should not exceed 1 A, to prevent overheating or damage. Direction of current is marked on each coil. • 150 mm diameter • 400 turns • Max. current 1A

Comprises a 3300 turn coil mounted on a wand, with flying leads terminating in 4 mm plugs. An alternating magnetic field passing axially through the coil will induce an e.m.f., which can be observed on an oscilloscope or AC millivoltmeter. Designed and manufactured in the UK.

Comprising a 10 turn coil of diameter approximately 15 cm, mounted on base with 4 mm connecting sockets. When AC is passed through the coil, an alternating magnetic field is induced, which can be detected with search coil. Requires power supply which can deliver high current at low voltage, such as Westminster Power Supply MA18796. The current must not be allowed to exceed 6 A. Designed by Timstar for AQA A-level physics required activity number 11.

Using high temperature superconductor (HTSC), this kit demonstrates an intriguing magnetic property of superconductors, known as the Meissner effect. The kit demonstrates the levitation of small rare earth magnet above the high temperature superconductor, caused by the partial expulsion of the magnetic flux from the HTSC sample. Liquid nitrogen (not supplied) is required as a coolant, to bring the superconductor below its critical temperature. When the superconductor is cooled, under a weak magnetic field, to a temperature below its critical temperature, it becomes superconducting i.e. loses its electrical resistance. The magnetic field becomes expelled from the superconductor, causing it to become perfectly diamagnetic. At this stage, the sample is said to be in the Meissner state. Please note: liquid nitrogen is required, but not supplied Kit Includes: • Insulated Styrofoam holder • Superconducting HTSC disk • NdFeB rare earth magnet • Tweezers • Instructions, including advice for handling liquid nitrogen

Ceramic magnets. Dimensions: 50 x 19 x 6 mm. Suitable for the Westminster Electromagnetic Kit. Sold in packs of 10.

Ceramic.

In pairs with keepers. 50 x 16 x 10 mm (L x W x D)

In pairs with keepers. 75 x 16 x 10 mm (L x W x D)

A set of 20 painted (red/blue) ferrite magnets for general use in exploring magnetism. Colour coded for easy identification and supplied in a snap top case. Magnet size 14 x 10 x 50 mm.

Tough plastic cased compass with lanyard. Marked with 4 compass points and full 360 degree scale around its edge. Size 45 mm diameter.

The gauss gun (also known as gaussian gun or rifle) is an example of magnetic linear accelerator and uses powerful neodymium magnets to launch steel sphere at high speed. Magnets are held in place part way along the tube (using the steel washers provided), with two steel spheres on the 'downhill' side. Another sphere is rolled slowly towards the magnets and as it gets closer the magnetic attraction causes the sphere to accelerate considerably, resulting in the sphere impacting with the magnets, transferring energy to the sphere at the opposite end of the magnets causing it to shoot off at high speed (similar to how Newton's cradle works). Even faster speeds can be achieved by using series of magnets and spheres. The magnets and steel spheres are contained within clear plastic tube for safety reasons (neodymium magnets are brittle and can splinter, the spheres can be accelerated with some force). Kit includes magnets and steel spheres, washers, a clear plastic tube, a stand for the tube and a brass peg. Instructions for use are also included.

Alnico horseshoe magnet painted red, with keeper. Size 25 mm.

One of the most powerful permanent magnets ever produced. Distance between poles 27 mm. Dimensions (L x H x W): 110 x 103 x 50 mm.

Feel the ultimate pulling power of magnetism with this pair of incredible new Super Magnets. Housed in tough colour coded outer mouldings (red - North, blue - South) the design allows children to safely experience first hand the force of neodymium - currently the world’s strongest permanent magnet! Size 60 mm.

Powerful disc magnets with the poles on the flat surfaces. Please Note: These magnets are brittle and fragments can fly off if magnets are allowed to come together rapidly, potentially causing harm or eye damage. Careful handling is also required to prevent skin from becoming trapped between two magnets. 8 mm depth x 10 mm diameter.

Powerful disc magnets with the poles on the flat surfaces. Please Note: These magnets are brittle and fragments can fly off if magnets are allowed to come together rapidly, potentially causing harm or eye damage. Careful handling is also required to prevent skin from becoming trapped between two magnets. 8 mm depth x 10 mm diameter.

Powerful disc magnets with the poles on the flat surfaces. Please Note: These magnets are brittle and fragments can fly off if magnets are allowed to come together rapidly, potentially causing harm or eye damage. Careful handling is also required to prevent skin from becoming trapped between two magnets. 4 mm depth x 10 mm diameter.

A revised version of the class Whitley Bay Smoke Cell, with LED illumination that runs cool, and will last many years. Using the supplied generator, smoke is introduced to the smoke cell, and the cell is sealed. The lens focuses the light onto a plane within the cell, making single layer of illuminated smoke cells. Observed under a microscope, individual smoke cells can be resolved, and Brownian motion observed. Requires 12 V DC power supply. Suitable microscopes are the Motic SFC-3A range (MI10434 and MI10436) Dimensions: 90 x 46 x 20 mm

Consists of a metal box with a sliding glass front and two detachable glass chimneys. A lighted tea light (night light) is placed beneath the base of one chimney to create convection currents. (Tea lights not supplied). Dimensions (L x H x D): 240 x 90 x 70mm.

Spare chimneys for Convection in Air Apparatus, HE18736.

Consisting of rectangular glass tubing. Dimensions (W x L x Dia.): 210 x 360 x 22mm.

Comprises a capillary tube and thermometer, mounted on a board with a scale behind the capillary tube. The apparatus comes complete with oil in the capillary tube, so no difficult filling with sulfuric acid is required. The relationship between temperature and volume can be observed easily, and an estimate for absolute zero can be obtained through extrapolation of experimental data. Also availabler as class set of 10 in a Gratnells case.

Comprises a capillary tube and thermometer, mounted on a board with a scale behind the capillary tube. The apparatus comes complete with oil in the capillary tube, so no difficult filling with sulfuric acid is required. The relationship between temperature and volume can be observed easily, and an estimate for absolute zero can be obtained through extrapolation of experimental data. Also availabler individually.

The apparatus comprises reservoir with bourdon gauge, connected to vertical glass tube. The reservoir has a needle valve to control pressure, and a high-quality tyre-type valve for attaching the supplied pump. Air does not escape when the pressure is increased, until the needle valve is opened. The pressure is displayed on a bourdon gauge, which has a transparent back, allowing students to see the internal workings. Pressures of up to 3.5x atmospheric pressure can be measured, which provides a good range of measurements. The tube is of strong construction, and is further protected by a plastic safety screen. It has graduations so that the length of the air column can be measured, and is of uniform cross-section, so the volume of air is proportional to the length of the air column. Unlike traditional Boyle's Law apparatus, this unit has no rustable materials, so water can be used instead of oil, which offers superior results, as well as reduced hazard and mess. The water is pumped into the tube, and the pressure and volume of air is measured at regular intervals. The inverse relationship between pressure and volume at constant temperature is easily observed.

This apparatus vividly demonstrates the rise in temperature that occurs when a fixed mass of air in a transparent cylinder is compressed by a hand operated piston. A piece of tinder, which is provided, ignites in the transparent cylinder: much as a diesel engine obtains ignition. The cylinder and piston can also be used to demonstrate the effect of decompression, being the immediate lowering of temperature and the consequent condensation of water vapour inside the cylinder the cloud formed can easily be seen. Cylinder Dimensions: (L) 198.00 mm (OD) 15.00 mm (ID) 9.00 mm

Spare cylinder for Hyman Fire Piston, HE43250.

Spare Tinder for Hyman Fire Piston, HE43250.

This 80 mm diameter hollow metal sphere is connected to manometer (Bourdon) gauge, for demonstrating changes of pressure in closed volume of air when either heated or cooled. Immersing the ball in heated water bath or ice bath allows the relationship between pressure and temperature of the enclosed air to be investigated. The metal sphere is more robust than glass versions and responds to temperature changes little faster.

This simple low-cost apparatus provides means of demonstrating Boyle's law. It is not 100% accurate but it is adequate for demonstrations giving students literally 'feel' for increase in pressure against volume.

A 1 litre capacity round can with screw cap.

To show that the level of liquid in connected vessels is constant irrespective of the vessel size or shape. Consists of four different glass vessels connected by common base tube and mounted on base. Dimensions (L x W xH): 230 x 100 x 160mm.

Hollow metal cylinder with overflow spout. Dimensions (L x Dia.): 100 x 50mm.

For demonstrating how pressure increases with depth. Consisting of a metal cylinder with three identical sized outlets at different levels down one side. Dimensions (H x Dia): 400 x 70mm.

Two-piece set. Brass ring and brass ball mounted in wooden handles. Dimensions (L): 260 mm.

An improvement on the riveted version, this bonded copper and steel bimetallic strip comes mounted in a wooden handle for ease of use. Heating on either side causes the strip to bend as the two metals expand by different amounts. Comes with instructions. Dimensions (L incl. handle): 300mm); Bimetallic Strip (L x W) 200 x 13 mm.

Optical quality rectangular glass block for refractive experiments. Dimensions 114 x 63 x 18 mm (L x W x D).