Timstar - Science

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.

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.

Spare main charge belt for hand driven Van De Graaff, EL101544

Spare hand drive belt for hand driven Van De Graaff, EL101544

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.

Spare charge belt for premium Van De Graaff, EL62550.

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.

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.

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.

Spare charge belt for Van De Graaff Generator EL85100.

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.

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.

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.

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.

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.

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.

With parallel sides and rolled rim. 50 mm diameter x 75 mm height.

With parallel sides and rolled rim. 50 mm diameter x 75 mm height.

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.

Thick sleeves and base mat to fit calorimeters.

Thick sleeves and base mat to fit calorimeters.

Insulating covers made from white PVC to fit calorimeters. Each cover has a central hole for a thermometer and a smaller hole for stirrer.

Insulating covers made from white PVC to fit calorimeters. Each cover has a central hole for a thermometer and a smaller hole for stirrer.

With parallel sides, rolled rim and thicker than average walls.

With parallel sides, rolled rim and thicker than average walls.

With parallel sides, rolled rim and smoothed internal side walls. 50 mm diameter x 75 mm height.

With parallel sides, rolled rim and smoothed internal side walls. 75 mm diameter x 100 mm height.

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.

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.

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.

For use with the motor to demonstrate the production of electrical energy directly from light energy. The apparatus comprises aselenium photo-voltaic cell.

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.

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.

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.

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.

Spare glass bulb for Hero's Engine, HE180500.

The 'Singing Pipe' apparatus is a simple, effective and entertaining way to demonstrate energy conversion from heat (thermal energy) to sound energy. Quick and easy to set up and use, this demonstration rarely fails to impress. The apparatus consists of a 450 x 28 mm copper tube which has a metal gauze fitted inside, at pinch point part way up from the base. The tube should be supported by a retort clamp towards the top, away from the heat, and blue Bunsen burner flame directed into the base and onto the gauze for few seconds only. Shortly after removing the flame, the tube emits loud 'foghorn' sound as air is drawn up the tube by heat rising from the hot gauze. If the tube becomes too hot it will stop emitting sound, in which case it should be allowed to cool before trying again.

Solar panel consisting of 36 monocrystalline solar cells mounted in an aluminium frame with front glass panel. Complete with shrouded 4 mm plug leads. • Maximum output: 18.0 V / 0.58 A • Open-circuit voltage: 22 V • Short-circuit current: 0.6 A • Dimensions: 383 x 299 x 34 mm

Fitted with threaded stud terminals. Output 0.45 V. May be fitted together for increased power. 400 mA. 75 x 45 x 7.5 mm (L x W x H)

Fitted with threaded stud terminals. Output 0.45 V. May be fitted together for increased power. 400 mA. 75 x 45 x 7.5 mm (L x W x H)

A kit comprising 8 solar modules, low-inertia motor, impeller, connecting lead and copper links for cell interconnections and housings and brackets to enable the construction of various solar powered projects. The modular concept of this kit enables experimentation with differing voltages and currents to produce the required circuit. The kit also includes comprehensive booklet covering principles of solar power, together with useful connection diagrams and output calculation formulae.

A powerful compact engine capable of driving workshop models. Uses solid fuel tablets.

A versatile unit capable of driving larger models. Uses solid fuel tablets.

Suitable for Mamod steam engines. Supplied in pack of 20 tablets.

A twin cylinder stationary engine complete with generator and light.

Thermal conductivity apparatus for use witha tea light candle or small bunsen burner flame. The unit has an integral polished wooden handle and metal rods (aluminium, brass, mild steel, copper and nickel) mounted ina brass centre block. Students can discover which metals conduct heat the most efficiently by placing small amount of wax at the end of each rod and seeing which melts first when heat is applied to the centre block. Wax not included. Rod Dimensions (Dia. x L): 4 x 75mm.

Consists of four metal strips (aluminium, brass, copper and iron) mounted on a wooden ring. The outer end of the strips are formed into small cup to contain wax. Suitable for use with a small bunsen flame or tea light/candle.

Conductivity rods, aluminium. Diameter 3 mm x 30 cm length.

Conductivity rods, copper. Diameter 3 mm x 30 cm length.

Conductivity rods, iron. Diameter 3 mm x 30 cm length.