This moving coil meter has two ranges, 0 to 1A or 0 to 5A and is suitable for d.c. only. Volts drop 75mV.

The National Grid Demonstration is an extremely safe way to demonstrate the advantages of distributing power at high voltages.

The demonstration is made up of two step up/down transformers that are used to transform the 12V ac from a school power supply to 115V (nominal). The trans...

The Unilab g by freefall ball is a fun way to measure the acceleration due to gravity and make empirical measurements to illustrate the laws of motion. The g ball contains an accurate timer with millisecond resolution. Timing begins when the button is released and stops when the g ball hits the g...

The SpillNot is an ingenious gadget that will let you carry an open beverage without spilling it. With a little bit of practice, spin a cup of liquid around in a circle without even losing a drop! The forces in action will fascinate your students and challenge their analytical reasoning.

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This large cloud chamber allows the visualization of atomic particles as they pass through a super saturated Isopropanol vapour, cooled by dry ice. Energetic charged particles collide with the gas molecules causing a trail of ionized particles. These ionized gas particles act as nucleation sites...

The Power Amplifier is a very useful classroom resource that allows students to amplify and listen to a variety of audio sources ranging from microphones and audio devices with a 3.5mm headphone socket, to signal generators equipped with 4mm socket outputs. The amplifier is particularly suitable...

Intended for teacher demonstrations only. The Rubens' Tube is an Aluminium tube with a row of small holes drilled along the top and 10W loudspeaker mounted at one end. Full instructions included. Users will need a gas source (Natural or LPG) and a power signal generator to run the speaker.

The Vibration Generator gives mechanical oscillations when fed by signals from an oscillator/A.F. amplifier e.g. a Power Signal Generator. A special high temperature coil system enables the unit to be operated at its maximum rating for a prolonged period without damage due to overheating.

...

Intended for teacher demonstrations only. The Rubens' Tube is an Aluminium tube with a row of small holes drilled along the top and 10W loudspeaker mounted at one end. Full instructions included. Users will need a gas source (Natural or LPG) and a power signal generator to run the speaker.

The Rubens’ Tube Pro is an exciting and very visual way to demonstrate the concept of a standing wave.

By making measurements it is also possible to calculate the speed of sound. The Rubens Tube Pro has a built-

in amplifier so it can be driven by a wide range of signal sources...

The ancestor of all cameras, this hand-held camera obscura projects an image onto a screen inside the box.

The wooden camera is supplied in kit form and has an authentic look and feel when assembled.

This compact unit provides an elegant method of demonstrating the wave phenomena of reflection, diffraction, refraction and interference with none of the setting-up problems usually associated with ripple tanks. The concept has been further developed to offer new features and simplicity in this ...

The UVC lamp is primarily intended to demonstrate the photoelectric effect using a zinc plate and gold leaf electroscope. The lamp emits UVC light with a peak wavelength of 253.7nm and must not be used as a general-purpose UV light source. This lamp is an excellent replacement for the now obsolet...

The Spark Discharge Apparatus is an extremely visual and audible demonstration of the ionization of air caused by Alpha particles. As an Alpha source is moved along the brass mesh, Alpha particles ionize the air, causing a conductive path to form from the mesh to the conductor below, causing a s...

Five different surfaces. How do surfaces affect friction and the distance trucks travel?

A comprehensive set of sixteen workcards to complement the BEK. The workcards cover:

• Lighting a lamp

• Brightness of a lamp

• Using a switch

• Lamps in series

• Lamps in parallel

• Lamps and switches<...

This kit provides everything required to produce a simple d.c. motor, helping students to better understand how they work and the principles behind them. Fully illustrated instructions make building the motor an accessible project for students of all levels.

The kit contains:

1x...

Iron filings pre-packed in cardboard ‘sprinkler pots’.

Contents of pot: 225g

A low-voltage d.c. motor with series resistor to limit current consumption.

Mounted red LED bulb with 4mm sockets.

Mounted green LED bulb with 4mm sockets.

Comparisons can be made between the AA and D cells - internal resistance and maximum current.

It is hoped that students will see patterns - smaller resistors result in smaller terminal voltage and larger circuit currents.

Your ammeter should be connected between point X and the top of...

Kit Contains:

5000? Thermistor

1N5401 Diode

White LED (30mA Max)

100? 5W Variable resistor

1k? 0.5W resistor

470? resistor

100? 1W resistor

47? 2W resistor

22? 2W resistor

10? 2W resistor

2200uF capacitor

10F super cap...

BEK 5kOHMs NTC Thermistor

A general purpose diode, 3A maximum current

White LED with a forward voltage of 3V and max current of 30mA.

BEK 100OHM 1W Potentiometer

BEK 1K OHM 0.5W Resistor

BEK 470OHM 2W Resistor

BEK 100 OHM 1W resistor

BEK 47 OHM 2W Resistor

BEK 22 OHM 2W Resistor

BEK 10 OHM 2W Resistor

BEK 2200uF Capacitor

BEK 10F Super Capacitor

BEK Reed Switch

The Unilab BEK Ammeter is new addition to the Unilab Basic Electricity Kit. This simple, miniature, Ammeter is an ideal way

to make current measurements in electrical circuits. If the maximum current of 2A is exceeded, the Ammeter will automatically limit the current to 0.5A (Typ) and wil...

The Unilab BEK Voltmeter is new addition to the Unilab Basic Electricity Kit. This simple, miniature, Voltmeter is an ideal way to make Voltage measurements in electrical circuits.

Specification:

Resolution 10 mV

Accuracy ...

BEK Storage Tray Foam Insert fitting a Gratnells tray. Perfect for seeing which tiles are availble or missing

UNI-T's UT139B is a True RMS Auto Range Digital Multimeter with 4000 display count and 1kHz bandwidth, featuring VFC, NCV, Max/Min/Rel measurements.

The meter can measure AC/DC Voltage and Current, variable frequency voltage (V.F.C.), resistance, diode, circuit on-off, capacitance, fre...

Neat and compact ramps for floor or tabletop use. The solid wood ramps adjust to different heights and take apart for easy storage. The set includes 5 ramps and 5 open-backed trucks, which can be loaded for other investigations. Dimensions of ramp: 115mm x 500m.

Calorimeters, Copper - 75 x 50mm

With parallel sides and rolled rim.

Please note that natural oxidisation can occur

Dimensions: 75 x 50mm

Calorimeters, Copper - 100 x 65mm

With parallel sides and rolled rim.

Please note that natural oxidisation can occur

Dimensions: 100 x 65mm

*Calorimeter Stirrer available separately (B8R05623)

An encapsulated assembly comprising 8 individual cells which produce an output of 3 volts 100mA max. Ideal for low current applications. Will drive 250-132 solar motor.

Size: 95 x 65 x 7.5mm.

• Current range: ±7A (current can flow in either direction)

• Voltage range: ±25V

• Log memory: 2500 samples

• Log sample period: 1, 2, or 4 seconds

• The meter can be powered over USB or using...

Thick felt sleeves and a base mat to fit 50mm calorimeters

Thick felt sleeves and a base mat to fit 75mm calorimeters

Thick felt sleeves and a base mat to fit 65mm calorimeters

Thick felt sleeves and a base mat to fit 90mm calorimeters.

50mm diameter aluminium pulley on an aluminium frame measuring 20 x 20 x 110mm. Frame includes three holes and a clamping screw to accommodate mounting to standard retort stand rods.

Pulleys may be fitted to the frame with its axis of rotation in any one of three planes.