Electricity

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Passion for Science

76 • Electricity

Passion for Science

Power Supplies

Power supply 0-24 V AC/DCThis power supply features continuous regulation from 0-24 V AC and DC. It can be connected to separate loads to the DC and the AC connections, and the voltages can be set separa-tely. It also permits simultaneous digital readout of both the AC and DC voltages and currents.The power supply has continuous regulation of DC current in the entire current range, and a fixed AC current limiter is provi-ded. It is electronically protected against overloads. LED indicators in both the DC and AC ranges indicate whether or not the current supplied has reached the upper limit, in which case the built-in current regulation will reduce the out-put voltage.The switch mode design enhances the dependability and life-time of the power supply due to lower operating temperatures for all circuit components. The supply also boasts low weight compared with traditional power supply solutions.This is a user-friendly power supply with a large capacity. The simple and logically arranged control panel reduces the pos-sibility of incorrect use. The unit is sturdy and compact. It can operate hour after hour at maximum rated current capacity without overheating

– Powerful, stabilised DC section with adjustable current limiter

- Synthesized AC output, isolated from mains noise and distortion

- Simultaneous readout of voltages and currents for AC and DC

- Weighs only 2.5 kg

- High efficiency – low temperature

- No fan – no noise

Specifications

DC– Voltage: 0-24 V DC smoothed, stabilized and continuously adjustable– Noise and ripple: Less than 25 mV– Current: Up to 10 A

AC– Voltage: 0-24 V AC continuously adjustable– Current: Max. 6 A– Frequency: The same as the line voltage (50-60Hz) Common– Electronically protected against overloading– Line voltage: 230 V AC– Size: 297 x 225 x 118 mm– Weight: 2.5 kg

3640.00 Power supply 0-24 V AC/DC

Power supply 0-24 V AC/DCSimilar to 3640.00 but the current limiter is operated through a hole in the front using a screw driver.

3640.10 Power supply 0-24 V AC/DC w/o lim. button

3640.10

3640.00

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3655.75-80

0-500 V stabilized DC power supply, 50 mAThe perfect choice for experiments with e.g. electron beam tubes requiring voltages up to 500 V at a low current level. The unit also provides a continuously variable output of 0 to -50 V DC. Voltage and current can be read from separate displays allowing the user to monitor either of the two ranges 0 to +500 V or 0 to -50 V. The power supply has a separate outlet for filament heating, offering six fixed AC voltages. All outputs are equipped with automatic thermal cutoff for overload protection.

Technical Specifications:

DCVoltages: -50 V / 0 / +500 V continuously variableCurrent: Max. 50 mA.Ripple: Less than 0.1%.

ACVoltage: 2, 3, 4, 5, 6 or 7 VCurrent: Max. 3ASupply: 230 V AC, 50 HzSize: 297 x 225 x 118 mmMass: 4.55 kg

3655.75 0-500 V Power supply, 50 mA

0-500 V power supplySimilar to the 3655.60 but limited to max. 2 mA current.

3655.80 0-500 V Power supply, 2 mA

High voltage power supply 0 - 6 kV DCThis power supply is ideal for experiments with electron beam tubes, electrostatics, Millikan’s apparatus and others.- Digital readout of thermal voltage- Safe for students - current limited to 2 mA- HV output floats relative to ground - choose positive or nega- tive potential by shortning the opposite socket to ground- Convenient 6.3 V AC outlet for filament current etc.

Technical Specifications:

DCOutput voltage: 0-6 kV stabillized, continuously adjustableShort ciruit current: 2 mA (Max.)Ripple and noise (max.): Less than 1%Readout accuracy: Better than 1 % + 1 digit

ACOutput voltage: 6.3 V Output current (max.): 3 ASupply: 230 V AC, 50 HzSize: 297 x 225 x 118 mmMass: 4.8 kg

3670.60 High voltage power supply 0 - 6 kW

367060

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Power supply• Combined DC and AC supply at competitive price

• Stabilized, continuously adjustable DC: 0 to 12 V

• AC presets: 2, 4, 6 and 12 V

• Currents up to 3 A at both outputs

• Outputs are overload protected

• Quiet operation - no fan

High quality – low priceThe new power supply 3616.00 covers the need for a reliable power supply for numerous experiments.Our goal with this power supply has been a competitive price, yet good quality.The quality is exemplified by the stabilized DC voltage that can be adjusted continuously in the range 0-12V. This output is electronically protected against overload and short circuit.The power supply has 4 different AC voltages. The vast majority of alternating current experiments can be performed at one of these voltages.

SpecificationsDCOutput voltage: 0-12 V (stabilized), continuously adjustableOutput current (max): 3 ARipple and noise (max): 100 mV

ACOutput voltage: 2 - 4 - 6 - 12 V, stepwise adjustableOutput current (max): 3 AMains voltage: 230 V, 50-60 HzPower consumption: 110 W (Max.)Fuse: T 1A (slow) Dimensions (WxDxH): 203 x 205 x 117 mm

3616.00 12 V Power supply

3616.01 12 V Power supply - 115 V

Non-stabilized power supplies

Power supply 24 V AC/DCContinuously variable AC and DC outputs. The DC output is partially smoothed by means of a capacitor. Electronically protected against overloads.Digital readout of both AC and DC voltages.

Technical Specifications

DCVoltage: 0-24 V continuously adjustableCurrent: Max 5 A.Ripple: Max 5 V

ACVoltage: 0-24 V continuously adjustableCurrent: Max. 5 A.Supply: 230 V AC, 50/60 Hz.Size: 185 x 225 x 118 mm.Mass: 6 kg.

3618.70 Power supply 24 V AC/DC

3616.00

3618.70

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Power supply 1-12 V AC/DCA straight-forward and sturdy power source.Equipped with automatic thermal cutoff for overload protec-tion. A good (and economical) choice for primary schools, beginners’ student labs for simple experiments with lamps, resistors, etc. Stepwise regulation of both AC and DC at 1 V increments. Readout of both AC and DC voltages by means of a marked scale and a pointer knob.

Technical Specifications

DCVoltage: Full wave rectified. Adjustable 1 - 12 V DC in 1 V incrementsCurrent: Max 6 A

ACVoltage: Adjustable 1 - 12 V AC in 1 V incrementsCurrent: Max 6 ASupply: 230 V AC, 50/60 HzSize: 185 x 225 x 118 mmMass: 2.8 kg

3610.55 Power supply 1-12 V AC/DC

Power supply 2 - 24 V AC/DCLike 3610.50 but with a voltage range from 2 to 24 V in 2 V increments.Max current 5 A AC/DC.

3610.65 Power supply 2 - 24 V AC/DC

DC ACType Voltage Current Ripple Stabilized Adj. Protection Voltage Current Adj. Protection Dim. Weight V A V A V A V mm kg 3610.55 1 – 12 6 100% no 12 steps no thermal* 1 – 12 6 12 steps thermal* 203x225x118 3.1

3610.65 2 – 24 5 100% no 12 steps no thermal* 2 – 24 5 12 steps thermal* 203x225x118 3.3

3618.70 0 – 24 5 <5 V no continuously no thermal* 0 – 24 5 continuously thermal* 259x225x118 6

3616.00 0 – 12 3 <100 mV yes continuously no electronic 2, 4, 6, 12 3 4 steps thermal* 203x223x117 3

3640.00 0 – 24 10/6 <25 mV yes continuously yes electronic 0 – 24 6 continuously electronic 312x225x118 2.5

3655.75 -50-0-+500 50 mA <0.1% yes continuously no electronic 2 – 7 3 6 steps thermal* 312x225x118 4.6

3655.80 -50-0-+500 2 mA <0.1% yes continuously no electronic 2 – 7 3 6 steps thermal* 312x225x118 4.6

3660.50 3K-0–3K 1.8/0.1 mA <0.1% yes continuously no electronic 6.3 3 no fuse 312x225x118 4.8

Thermal* = Automatic thermal circuit breaker, activated in case of overload. Wait approx. 40 s then press the button and continue.

3610.55

3630.22

Power supplies for permanent installationThe following power supplies are designed for permanent in-stallation in cabinets, desks, lecterns or student workplaces. Fixtures and installation instructions are provided.

Power supply 0-24 V AC/DCLike 3630.00 but for cabinet/desk installation

3630.22 Power supply 0-24 V AC/DC for permanent installation

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Analog student instrumentsMeasuring instruments for student useThese instruments are rugged with simple, easily read scales. The instruments are electronically protected and can tolerate accidental overloading. Supplied with 4 mm safety connectors.

VoltmeterFor AC and DC measurements.Accuracy ±2% of full scale deflectionOverload protected.With colour coded 4 mm safety terminals.Resistance: 10 kΩ/VRanges: 0-3 V, 0-15 V, 0-30 V, AC or DCDimensions: 173 x 108 x 56 mm

3810.60 Voltmeter

AmmeterFor AC and DC measurements.Accuracy ±2% of full scale deflectionOverload protected up to 15 A on all ranges (momentarily up to 30 A)With colour coded 4 mm safety terminals.Max voltage drop: 0.25 V DC / 0.27 V ACRanges: 0-0.05 A, 0-0.5 A, 0-5 A, AC or DC.Dimensions: 173 x 108 x 56 mm

3810.70 Ammeter

GalvanometerA center zero moving coil galvanometer.A “push-to-read” switch protects the galvanometer during hookup by shunting the current through a resistor.Range: 50 - 0 - 50 µA DC 500 - 0 - 500 µA DC 5 - 0 - 5 mA DCDimensions: 173 x 108 x 56 mm

3810.80 Galvanometer

3810.60

3810.70

3810.80

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Demonstration Multimeter

Pressure, pH, temperature, frequency, voltage, current, resistance

Maintaining maximum student interest in a demonstration re-quires student involvement. This demonstration multimeter al-lows students – from anywhere in the class room – to see the instrument readings first hand.

1. Extra large digitsThe bright 45 mm high LED digits can easily be seen from the back of the classroom.

2. Extra large unit symbolsA bright 30 mm LED matrix shows the correct unit for the rea-ding (hPa, V, pH, °C, A, Ω and Hz).

3. Auto-rangingThe measuring range is automatically matched to the measured value.

Shown with 4530.10 gas voltameter and cables (not included).

4. One instrument for chemistry and physicsThis versatile instrument measures not only the usual electro-nic quantities like volts, amps and ohms, but also pressure, pH and temperature.

5. Back facing teacher's displayA secondary display is available on the back of the instrument. Its 14 mm high digits are readable even a few metres away.

6. Computer interfaceA serial interface is available for communication with a PC (eventually through a USB-to-serial adapter). The interface is electrically isolated from the rest of the instrument. For control and data acquisition we recommend the free pro-gram DataLyse (download from datalyse.dk).

3867.70 Demonstration multimeter

3867.70

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IM-131410

3868.02

3868.03

3868.04

3868.05

Range Accuracy Input Impedance Comments

Voltage DC 0 mV – 500 V 0.5 % + 1 digit 10 M

Voltage AC 20 mV – 500 V 10 Hz – 1 KHz 1 % + 1 digit 10 M

1 Hz – 2 KHz 2 % + 2 digit

2 Hz – 5 KHz 5 % + 2 digit

5 Hz – 10 KHz 10 % + 2 digit

Current DC 0 – 10 A 0.5 % + 1 digit 10 , 0.1 , 0.01 Fuse: mA: 2 A Fuse, A: warning

Current AC 20 µA – 10 A 10 Hz – 10 KHz 1% + 2 digit 10 , 0.1 , 0.01 Fuse: mA: 2 A Fuse, A: warning

Resistance 0 – 10 M 1 % + 1 digit Measuring current: 10 mA – 3 A

Frequency 0 – 100 kHz 0.5 % + 1 digit 10 M

Temperature -200 °C – 1370 °C 0.1% + 1 digit Probes: NiCr-Ni type K

Pressure 0 – 7000 hPa 0.1% + 1 digit Connector: DIN

pH 0,00 – 14,00 pH 0.1% + 1 digit > 10 G BNC

Accessories for demonstration multimeter

Thermo probes type K (NiCr-Ni)

No Type Dimensions Max Temp. Time constant 3868.01 Immersion probe 150 x Ø 3 mm 1200 ºC 1.3 s3868.05 Air probe 185 x Ø 6 mm 250 ºC 0.5 s2606.53 Thread probe 120 cm long 200 ºC

pH electrode

No Type Dimensions Range Socket 5415.20 Combi electrode 150 x Ø 12 mm 0.0 – 14.0 pH BNC-plug

Pressure sensors

No Range Socket Piping size IM-131410 0 – 130 kPa DIN Ø 6 mm

5415.20

3868.06

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Watt and energy meterOur Watt and Energy Meter is a most versatile instrument designed for education. The bright display with its 45 mm high digits is easily read even from the back of the classroom. Apart from measuring true RMS voltage (V) and current (A) the meter is capable of measuring apparent power (VA), phase angle (�), active power (W), energy consumption (Ws, Wh), fre-quency (Hz), and time elapsed (s, h) for energy consumption. The input terminals on the front panel are used for low voltage measurements. Measurements on mains operated equipment use the standard schuko power connector on the rear panel, making this application convenient and safe.The instrument has automatic range selection and the change between front and rear panel sockets also happens automatically.

4075.50 Watt and energy meter

Shown with 3207.00 Apparatus for light energy and cables (not included).

Computer interfaceThe instrument is equipped with a serial interface.The instrument may be controlled by e.g. a terminal program, but we recommend the free PC program DataLyse, download- able from datalyse.dk.

DataloggingA built-in data logger is available. Setting up and reading is done through the interface. An automatic start condition can be set by software as a given time or power level – manual operation is also possible.

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Watt meterThis robust, user-friendly instrument is easy for the students to understand. It can measure both AC and DC power. The instrument is overload-protected and will tolerate brief episo-des of incorrect connection and overload. Supplied with 4 mm safety jack connectors and a 4 digit LCD.Power supply: 4 ea. 1.5 V AA batteries or line adapter 3550.10 or 3550.20Measuring range: 0-200 W (max. 30 V and max. 10 A)Size: 158 x 108 x 56 mm

4065.50 Watt meter4065.50

Technical specifications 4075.50:

Range Resolution Accuracy Frequency Input impedance

V (Front Panel) 0 – 240 V DC/AC 0.1 / 1 V ±(2.5% + 1dgt.) 0 – 1000 Hz 1 M Ω

V (Rear Panel) 30 – 240 V AC 1 V ±(2.5 % + 1dgt.) 45 – 65 Hz

A (Front Panel) 0 – 10 A DC/AC 0.01 / 0.1 A ±(2.5 % + 1dgt.) 0 – 1000 Hz 0,047 Ω

A (Rear Panel) 0 – 10 A RMS 0,01 / 0,1 A ±(2.5 % + 1dgt.) 45 – 65 Hz

VA 0 – 2400 VA 0.1 / 1 VA ±(5 % + 1dgt.)

� 0° – ±90° 1° ±(5 % + 2dgts) 3 – 1000 Hz

W 0 – 2400 W 0.1 / 1 W ±(5 % + 1dgt.)

Ws, Wh 0.1 – 9999 Ws, Wh 0.1 / 1 Ws, Wh ±(5 % + 1dgt.)

Time 0.1 – 9999 x 103 s, h 0.1 / 1 s, h ±(0.2 + 1dgt.)

Hz 3 – 1000 Hz

Power adapters

Power Adapter 12V 1.5A – DC plug 2.1mmMains voltage 100-240 V, 50/60 Hz.Presently used with the following: 1770.00, 2002.60, 2211.00, 2211.01, 2874.00, 4060.50, 5136.00, 5138.00 Note: Older versions of these items may use 3550.10 instead – check the plug type (jack or DC)

3550.50 Power Adapter DC plug (for Euro mains)

3550.52 Power Adapter DC plug (Multi mains plug, incl. US, UK etc.)

Power Adapter 12VDC, 300 mA – 3.5 mm jackPresently used with the following items: 2515.60, 4065.50, 5060.00, 5480.00. Note: Older versions of several other items may use this adap-ter – check the plug type (jack or DC)

3550.10 Power Adapter jack plug (for Euro mains)

Power adapter 3-12 V DC, 1.5 A – UniversalThis compact, switch mode mains adapter ensures high ef-ficiency and a minimum of heat dissipation. Delivers up to 1.5 A for all voltages.The voltage tis switchable between: 3, 4.5, 5, 6, 7.5, 9 or 12 V.Supplied with seven different connectors including a USB type A socket. For all connectors, both polarities can be selected.

3550.35 Power adapter 3-12 V DC, 1.5 A – Universal (for Euro mains)

3550.10

3550.50

3550.35

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Digital multimeter, model 120A user-friendly and inexpensive multi- meter. With only two jack connections the risk of incorrect operation is reduced. The instrument can measure DC voltages and currents, AC voltage and resistance. Diode test, transistor test and battery test features are provided.Supplied complete with test leads, manual, protective cover and battery.

3862.25 Digital multimeter model 120

Digital autoranging multimeter, model 125Measures voltage, current, resistance. It features an analog bar graph and a diode tester with optional sound signal. The “auto power off” feature turns off the power after about 10 minutes. There is a “battery low” indicator.Compared to 3862.25, especially the A and mA ranges are noticed.The instrument is provided with an automatic sound signal in case of incorrect connection to limit the risk of damage. Manual or automatic scale switching is provided along with automatic polarity and over range indicators.Supplied complete with test leads, manual, protective cover and battery.

3862.15 Digital autoranging multimeter

3862.15

3862.25

3862.30

Specifications:

3862.25 3862.15 3862.30

V DC 2/20/200/600 0.32/3,2/32/320/600 0.4/4/40/400/1000Precision (VDC) 1.2 % + 1 digit 1.2 % + 1 digit 0.8 % + 1 digit V AC 200/500 3.2/32/320/600 4/40/400/750 Meas. Cat. Cat.I 600V, cat.II 300V Cat.III 600V Cat.III 1000V, cat.IV 600V mA AC,DC - 0.32/3,2/32/320 0.4/4/40/400 A AC,DC 2 10 4/10 Fuses 2 A 500 mA, 10 A 500 mA, 10 A Ω 200/2k/20k/200k/2M 320/3,2k/32k/320k/3,2M/32M 400/4k/40k/400k/4M/40M F - - 40n/400n/4µ/40µ/100µ Hz - - 10 – 10M Other Diode test. Hfe. Bar graph Temperature

Digital multimeter model 8060Autoranging multimeter with 3 ¾ digit LCD display. This up-to-date instrument offers the usual voltage, current and resistance ranges – plus capacitance and frequency. It can even be used as a thermometer. The precision has been tightened compared to 3862.25 and 3862.15, and the voltage ranges are extended. Supplied with test leads, temperature probe, manual and battery.

3862.30 Digital multimeter model 8060

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Oscilloscope 20 MHzThe classic low cost model is well-suited to use in schools. The technical specifications are as follows:– Double trace with XY-option– Bandwidth 20 MHz– Sensitivity 5 mV/cm to 5 V/cm– Sweep rates 50 ns/cm to 0.5 s/cm– Supplied with BNC connectors– External trigger connection

4000.40 Oscilloscope 20 MHz

Adapter BNC/ double banana plugUse two of these adapters with the oscilloscope to accommodate banana test leads and safety cables.

1110.05 Adapter BNC/double banana plug

Shielded cableLength 115 cm. BNC-plug and safety type banana plug. Impedance 50 Ω.

1100.02 Shielded cable

Safety cablesSafety cables are test cables with 4 mm plugs and a firm shie-lding. Safety cords cannot be plugged into regular sockets or mains outlets. The live parts cannot be touched by hands. Manufactured to IEC 61010. Highly flexible silicone shielded safety cords with copper area 1.5 mm2 max 1000 V / 25 A. Temperature range -60 to +180 °C.

Item no Name Length Colour

1057.10 Safety cord 25 cm black1057.11 Safety cord 25 cm red1057.12 Safety cord 25 cm yellow1057.13 Safety cord 25 cm blue

1057.20 Safety cord 50 cm black1057.21 Safety cord 50 cm red1057.22 Safety cord 50 cm yellow1057.23 Safety cord 50 cm blue

1057.40 Safety cord 100 cm black1057.41 Safety cord 100 cm red1057.42 Safety cord 100 cm yellow1057.43 Safety cord 100 cm blue

1057.50 Safety cord 200 cm black1057.51 Safety cord 200 cm red1057.52 Safety cord 200 cm yellow1057.53 Safety cord 200 cm blue

Alligator clips, safety typeItem. no. Name Colour1090.20 Alligator Clip Black1090.21 Alligator Clip Red

Alligator clipsUnshielded. With 4 mm hole. Fits both standard test cables and safety type test cables. Package with 50 pcs.

1090.00 Alligator Clips

4000.40

1110.05

1057.10-53

1100.02

1090.00

1090.20.20-.21

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4130.10

Lamp holders and switches Lamp holder E10 Mounted on a plastic base with two 4 mm safety terminals. Dimensions: 72 x 143 mm.

4120.00 Lamp holder E10

Lamp holder E10Mounted on a plastic base with four 4 mm safety terminals for series or parallel connection. Dimensions: 72 x 143 mm.

4120.10 Lamp holder E10

Lamp holders E14/E27 for safety cable Mounted on a 72 x 143 mm plastic base with two 4 mm safety sockets.

4130.00 Lamp holder E274125.00 Lamp holder E14

Lamp holders E14/E27 for mains connectionMounted on a 10 mm diameter rod, supplied with cable and 230 V plug.Stand base is not included (shown with 0004.10).

4130.10 Lamp holder E27

4120.00

4120.10

4125.00

4130.00

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4250xx

4140.00

Push-buttonMounted on a 72 x 112 mm plastic base with two 4 mm safety sockets.

4150.00 Push-button

Contact key, singleThis telegraph key consists of a nickel-plated spring with a knob. Mounted on a 72 x 143 mm plastic base with two 4 mm safety sockets.

4140.00 Contact key, single

Knife switchSingle pole double throw switch. Mounted on a 72 x 143 mm plastic base with three 4 mm safety sockets.

4145.00 Knife switch

Incandescent lampsNo. Voltage Current Socket Units/ package 4250.05 1.5 V 0.09 A E10 104250.10 2.5 V 0.3 A E10 104250.15 3.5 V 0.2 A E10 104250.20 4 V 0.3 A E10 10

4250.25 6 V 0.05 A E10 104250.30 6 V 0.1 A E10 104250.35 6 V 0.5 A E10 104250.40 6 V 1 A E10 10

4250.45 12 V 0.25 A E10 10

4255.20 6 V 5 A E14 14280.00 12 V 15 W festoon 1

4150.00

4145.00

4250.05-25

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Mounted components

Battery holder on plateBattery Holder for one ”D”-cell. Mounted on plate, fitted with safety sockets.

3521.10 Battery holder on plate

Power resistorsWire wound resistors mounted on a 72 x 112 mm plastic base with two 4 mm safety sockets.

No. Resistance Power Tolerance

4205.05 1 Ω 50 W 5 %4205.25 5 Ω 50 W 5 %4205.30 10 Ω 50 W 5 %4205.35 51 Ω 9 W 10 %4205.40 100 Ω 9 W 10 %4205.45 150 Ω 9 W 10 %4205.50 1000 Ω 9 W 10 %4205.56 2.2 k Ω 10 W 1 %4205.61 4.7 k Ω 10 W 1 %4205.66 10 k Ω 10 W 1 %

Resistor holderUse this holder to obtain non-standard resistance values by parallel coupling ordinary resistors.Two lines of screw terminals are mounted on a plate and supplied with 4 safety terminals. Size: 72 x 143 mm.

4160.00 Resistor holder on plate

Electrolytic capacitorsUsed in energy conversion experiments to show how energy is stored in a capacitor and to demonstrate that energy stored in a capacitor is proportional to the square of the voltage.

No. Description 4300.70 Capacitor 15.000 µF 25 V

NYT BILLEDE AF 430070

RectifierThis silicon diode is mounted on a plate with safety jack con-nectors. Max. 6A / 600 V AC. Plate size: 72 x 112 mm.

4340.00 Rectifier

3521.10

4205.05-65

4160.00

4300.70

4340.00

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Full wave bridgeThis silicon full wave bridge is mounted on a plate with 4 safety jack connectors. Max. 1.2 A / 60 V AC.Plate size: 72 x 112 mm.

4345.00 Full wave bridge, 1.2 A

Full wave bridge with LEDsUsed for demonstrating the operation of a full wave bridge. Gives a good, intuitive illustration. It consists of a plate with four arrow shaped red LEDs, connected to four safety jack connec-tors. Used with a 1 kΩ load resistor like 4205.50. Can be used with signal generator type 2502.50. By reducing the frequency to a fraction of a Hz, each step in the rectification process can be followed. Max 15 mA / 25 V AC.Plate size: 90 x 90 mm.

4346.00 Full wave bridge with LEDs

4345.00

4346.00

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Current direction indicator, 30 VThis current direction indicator has LEDs mounted with op-posite polarities. If the unit is connected to a direct current source, then one of the LEDs will light up and show the direc-tion of the current. If the unit is connected to an alternating cur-rent source, both LEDs will light up. If the unit is moved back and forth the eye can detect that the LEDs light up alternately as the current switches back and forth. The current indicator is supplied with two 8 mm diameter red LEDs mounted in a cabinet with 4 mm safety connectors. Provided with a 10 mm diameter mounting rod. Size: 120 x 120 x 27 mm.Rod length: 93 mm.

4347.20 Current direction indicator, 30 V

Current direction indicator, 300 VLike 4372.20 but for connecting for voltages of up to 300 V.

4347.10 Current direction indicator, 300 V

Material samplesSet of 8 sticks. Used to examine the conductivity of different materials. Made of aluminium, lead, nylon, glass, rubber, iron, copper and brass. Supplied with plastic case with transparent cover. Diameter 5 mm, length 102 mm.

2690.00 Material samples

Resistors for measuring temperature coef-ficientsThese immersible resistors are used to determine the resistan-ce temperature coefficient for various materials. They consist of resistance wire (diameter 0.25 mm) wound on Plexiglas cores with safety jack connectors. The resistance wire is immersed in a non-conductive liquid (e.g. demineralised water, kerosene or mineral oil). By measuring the resistance as a function of temperature the temperature coefficients of the materials can be found. Size 180 mm x 20 mm diameter.The specified resistance values are for 20 °C.

4240.10 Resistor, copper app. 1.8 Ω4240.20 Resistor, constantan app. 46.7 Ω Ω4240.30 Resistor, nickel app. 8.7 Ω

4347.10

4347.20

2690.00

4240.10-30

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Variable resistors

Decade resistance box 0 to 1 MΩThis sturdy decade resistance box has 7 decades.Range: 0 to 999.999 Ω in 0.1 Ω intervalsAccuracy: x 0.1 Ω +/- (5% + 0.04 Ω). x 1 Ω and 10 Ω +/-(2% + 0.04 Ω). x 100 Ω to 100 k Ω +/- (1% + 0.04 Ω).Size: 280 x 85 x 175 mm.

4236.10 Decade Resistance box 1 MΩ / 0.1 Ω

Decade resistance box 0 to 10 MΩThis sturdy decade resistance box has 7 decades.Range: 0 to 9,999,999 Ω at 1 ohm intervalsAccuracy: x 1 Ω and 10 Ω +/- (2% + 0.08 Ω). x 100 Ω ohm to 10 MΩ +/- (1% + 0.08 Ω).Size: 280 x 85 x 175 mm.

4236.00 Decade resistance box 10 MΩ / 1 Ω

RheostatsThis linear variable resistor is cabinet mounted with safety jack connectors. The resistor inside is wound on a stable ceramic core. With three safety jack connections on the cabinet, so the resistor can serve as a variable resistor or as a voltage divider. The resistor can be overloaded 100% for a brief period of time (max. 4 minutes).4220.50 Variable resistor, 0-10 Ω / 4 A4220.60 Variable resistor, 0-33 Ω / 3.1 A4220.70 Variable resistor, 0-100 Ω / 1.8 A4220.80 Variable resistor, 0-330 Ω / 1 A4220.90 Variable resistor, 0-1000 Ω / 0.57 A

4236.00

4236.10

4220.50

4220.60

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Stationary terminals

Stationary terminal10 mm dia. rod with terminal screw and two Ø 4 mm mounting holes for 4 mm plugs (both banana and security type). Length 100 mm. Supplied in pairs.

4350.00 Stationary terminal

Stationary terminal, insulated, pairInsulated stationary terminals with Ø10 mm mounting rod. Fitted with an insulated terminal screw. Fits all 4-mm plugs (both banana and security type). Supplied in pairs.

4350.30 Stationary terminal, insulated, pair

Stationary terminal, insulatedInsulated holder for electric cables. Plexiglas insulator on rod with 4 and 4.5 mm mounting holes, socket for security plugs and terminal screw. Length 170 mm.

4350.10 Stationary terminal, insulated

,

Dual stationary terminal, insulatedInsulator on Ø 10 mm rod with two terminal screws. Fits all 4-mm plugs (both banana and security type).Length 200 mm.

4350.20 Dual stationary terminal, insulated

4350.00

4350.30

4350.10

4350.20

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Student gas voltameterFor students’ experiments. Embedded platinum electrodes with terminals for 4 mm plugs. The gas is collected in the two miniature test tubes (included).Made of acid-proof plastic.

4530.00 Student gas voltameter

Lid for gas voltameterThis item is used along with the electrolysis container item no. 4530.00 as a hydrogen supply for e.g. fuel cells. The lid is provided with two plastic tubes placed above the platinum electrodes of the electrolysis container.Hydrogen and oxygen can then be supplied to the fuel cell. The lid is provided with a silicone O-ring to ensure a stable and tight connection between the lid and the container.Supplied with 60 cm silicone tubing.

4530.05 Lid for gas voltameter

VoltameterFor studying gas quantities developed through electroly-sis. The apparatus consists of a clear plastic jar with two platinum plate electrodes and 4 mm terminals for security plugs. A movable mm scale is provided to measure the height of the gas surfaces. Supplied with two test tubes to collect the gene-rated gas. Height: 240 mm.

4530.10 Voltameter

Voltaic pileA model of the first galvanic battery – build from modern materials. Copper and zinc discs with an electrolyte in between form the individual elements.

3522.00 Volta’s pile

Consumables for Voltaic pile

3522.01 Zinc discs (10 pcs.)

3522.02 Copper discs (10 pcs.)

3522.03 Porous discs (10 pcs.)

4530.00

3522.00

4530.10

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Electrodes

Plate electrode with slit, angularPlate electrode designed for mounting in stationary terminal 4350.00. Can be used for making simple cells using glass jar 4495.00.Dimension: 37 x 70 mm.

No. Metal Thickness4500.00 Copper 1 mm4500.05 Aluminium 2 mm4500.10 Zink 2 mm4500.20 Lead 2 mm4500.30 Iron 1 mm

Plate electrodePlate electrode designed for mounting in electrode holder 4515.20. Used for voltaic cells. Dimensions: 50 x 87 mm.

Item no. Electrode Thickness4498.00 Copper 1 mm4498.05 Aluminium 2 mm4498.10 Zinc 2 mm4498.20 Lead 2 mm4498.30 Iron 1 mm

Electrodes, roundThese round electrodes 6-7 mm in diameter will fit elec-trode holders 4515.10 and 4515.20 and electrode connector 4513.00. They will also fit a rubber stopper with a 6 mm centre hole.

Item no. Electrode Length

4510.00 Copper 150 mm4510.10 Nickel 150 mm4510.20 Aluminium 150 mm4510.30 Tin 150 mm4510.40 Iron 150 mm4510.50 Carbon app. 200 mm4510.60 Zink 150 mm4510.70 Lead 150 mm

Silver electrodeSilver electrode for experiments concerning the oxidation potential of metals or for building voltaic cells. Rod shaped electrode of dimension 8 x 0.5 x 100 mm.

4500.95 Silver electrode

Copper electrode, copper nailsSquare, massive copper nails with pointsLength: 70 mm. Cross section: 3 x 3 mm. Package of 10 ea.

4517.00 Copper electrode, copper nails

4500.00-30

4498.00-30

4500.95

4510.00-70

4517.00

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Electrode holdersElectrode holder, doubleElectrode holder for two electrodes. Can be used with both round electrodes (4510.xx) and plate electrodes (4498.XX). The electrode holder is designed to be able to rest on the edge of glass jar 4495.00 or on a 250 ml low beaker. Furthermore the electrode holder can be mounted in a retort stand by means of holder 0026.00 (not included). Made of acid proof plastic.

4497.10 Electrode holder, double

Electrode connectorThis electrode connector is suitable for round electrodes up to 7.5 mm in diameter. The holder contact screw has a socket for connecting 4 mm safety jacks. Size: Ø 25 x 12 mm. Made of acid proof plastic.

4513.00 Electrode connector

Electrode holder for round electrodesHolder for round electrodes with a diameter up to 7.5 mm. The holder is designed with a slit, for mounting in stationary terminal 4350.00. The electrode is kept in position by a screw, which also is supplied with a terminal for safety cables, thus acting as a contact. Made of acid proof plastic.Dimension: 65 x 25 x 12 mm.

4515.10 Electrode holder for round electrodes

Glass jarSturdy glass jar for creating simple cells. Dimensions: 80 x 60 x 100 mm (external). Wall thickness: 4-5 mm.

4495.00 Glass jar

0026.00

4497.10

4513.00

4515.10

4495.00

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Electrostatics

Van de Graaff generatorGenerates ultra high voltages for electrostatic experiments. Impressive sparks with a length of up to 100 mm can be ob-tained – but the equipment is still safe to use thanks to the very low output current. Electrons are transferred to the dome by a nonconductive belt which passes two rollers made from different plastics. The design is open to inspection – even the dome is easily dismantled – so the principles behind the device can be stu-died. The belt is driven by either a crank or a variable speed motor. On the top of the dome, a 4 mm socket is provided for accessories. Dust cover and manual included.

Specifications:Diameter of dome: 220 mmCapacitance of dome: 15 pF (approximately)Supply voltage: 230 V ACTotal height: 560 mmBottom plate size: 195 x 195 mm

3700.60 Van de Graaff generator

Conductor sphere on rodSphere for Van de Graaff generator 3700.00. Diameter 100 mm. Mounted on a 410 mm long Ø10 mm rod with a 4 mm safety terminal. (Retort stand base 0006.00 on the photo is not included.)

3705.00 Conductor sphere on rod

Insulated stoolFor use in experiments with static electri-city. The base is covered with laminate and mounted on PVC legs. Legs: Ø 30 x 35 mm. Plate: 305 x 305 x 20 mm.

4435.00 Insulated stool

Electric whirl for van de GraaffA needle with a 4 mm plug fits the socket on top of the dome of the van de Graaff. The rotor balances on the needle tip and sprays electrons from the pointed tips into the surrounding air. The charged air repels the nearby arm of the rotor which starts spinning.

4430.00 Electric whirl for van de Graaff

Discharge tubeNeon filled, for demonstrating electric charge and polarity.The negative electrode lights up with an orange glow.

4285.20 Discharge tube Faraday’s cageUsed to show that an electrical charge resides on the external surface of a conductor and that the net acts as an electric shield.Dimensions: Ø 210 x 320 mm.

4440.00 Faraday’s cage Capacitor Plates – metal netThe electric field between the two plates in a plate capacitor is almost homogeneous. The behaviour of pith balls, metal-lized ping-pong balls etc. is easily observed through the net. With insulated handle and 4 mm socket which accommodates security connectors. Diameter 400 mm. Supplied in pairs.

4445.00 Capacitor Plates - metal net

3700.60

4435.00

4430.00

3705.00

4440.00

4445.00

4285.20

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Materials for generating electrostatic charges by con-tact and friction

4380.00 Perspex rod 250 x 12 mm diametter4380.10 Glass rod 225 x 10 mm diameter4380.20 PVC tube 300 x 16 mm diameter4385.00 Polystyrene 30 x 30 x 250 mm4390.00 Woollen cloth 20 x 20 cm4390.10 Silk cloth 20 x 20 cm4390.21 Rabbit fur 20 x 10 cm app.

Brass rod with insulated handleFor showing that metals can acquire a static charge. The insu-lated handle is required to avoid unintentional discharge. Size: 250 mm x Ø 8 mm. Shaft: 100 x Ø 12 mm insulated shaft.4380.30 Brass rod with insulated handle

Rotation standThis rotating cradle for charged rods makes it possible to de-monstrate repulsion and attraction between electrical charges. Base diameter: 42 mm. Height: 95 mm.

4395.00 Rotating stand with base

Metal plated ping pong ballThe ball can be used to transfer and to study electrical charge. It may be suspended by a thread fixed to the short nylon wire. Diameter: 38 mm.Mass: 2 grams.

4405.00 Metal plated ping pong ball

Metal plated ball on rodThis ball on a rod is used to transfer electrical charge. Ball diameter is 38 mm. Rod diameter: 10 mm Rod length: 130 mm

4415.00 Metal plated ball on rod

Pith ballsThese 12 mm diameter balls of expanded polystyrene is used for demonstration experiments with electrical charge. Supplied in a plastic box with 10 ea.

4400.00 Pith balls

Insulated rod with hookThis rod is used for supporting the pith balls at some distance away from the hand when doing demonstration experiments with electrical charges and fields.

4450.00 Insulated rod with hook

4380.30

4385.00

4405.00

4407.00

4400.00

4450.00

4415.00

4380.10

4390.00 4395.00

4380.20

4380.004390.214390.30

4390.10

Pith ball supportThis support is supplied with a hook for conveniently holding a pair of pith balls connected by a string. Manufactured of nickel-plated brass with a plastic support base. Height: 220 mm. Support base: 100 x 70 mm.

4407.00 Pith ball support

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Faraday ice pailUsed with e.g. electroscope 4410.00 or electrometer 4410.30 to demonstrate that charge is distributed on the outer surface of a hollow metal body. Dimensions: Ø 68 x 77 mm, hole Ø 50 mm.Provided with a 4 mm plug.

4425.00 Faraday ice pail

Conducting sphereUseful for experiments in electrostatics e.g. examining the capacitance of a body. Sphere diameter: 68 mm. Provided with a 4 mm diameter plug for mounting on the insulated rod no. 4410.02.

4428.00 Conducting sphere, 68 mm diameter

Insulated rodUsed for mounting or handling capa- citor plates and conducting spheres when doing electrostatics experiments. The rod is provided with a Ø 4 mm hole for 4 mm plugs and a connection sockets for laboratory safety leads.Size: 145 mm x 10 mm diameter.

4410.02 Insulated rod

ElectroscopeFor demonstration of static charges. Available with charging ball plus a set of capacitor plates with insulated rod. Ring dia-meter 150 mm. Diameter of capacitor plates 56 mm.

4410.00 Electroscope

Zinc plateUsed with electroscope 4410.00 for demonstrating the photoelectric effect. If the zinc plate is negatively charged, the excess electrons can be released by illumination from a UV light source (e.g. UV mercury lamp 2865.00). For best results polish the zinc plate surface using fine steel wool before the demonstration.

4410.03 Zinc plate

4425.004428.00

4410.02

4410.00

4410.03

Low cost plate capacitorThis low cost square plate capacitor is manufactured from an aluminium plate with a right angle bend at one end. This edge has a slot to facilitate mounting on high voltage support connectors.Plate size: 220 x 220 mm, area: 484 cm2.

4315.30 Plate capacitor, 22 x 22 cm

4315.30

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Ionization chamberDemonstrate the ionization of air by alpha particles with this ionization chamber in combination with 4410.30 electrometer and an alpha source (like 5100.10)

4410.35 Ionization chamber Plate capacitorUsed with our 4410.30 electrometer and a high voltage sup-ply like 3660.50 to study the properties of plate capacitors. Comprising an anodized aluminium disc 150 mm diameter, mounted on an insulating plastic rod 10 mm diameter, with Ø 4 mm contact holes. To avoid stray capacitances, simply build the capacitor as shown with a stand base (e.g. 0006.00) and dielectrics or spacers (4316.00/4318.00) – purchased separately.

4315.10 Plate capacitor, 15 cm dia.

Dielectric for plate capacitorPVC plates for building plate capacitors with a dielectric. The 6 plates make distances between 2 and 12 mm possible. (Rela-tive permittivity of PVC is around 3 to 4).

4316.00 Dielectric for plate capacitor

Spacers for plate capacitorUse three small stacks of these spacers between the capaci-tor plates when building air capacitors. The spacers are made from the same material as 4316.00 but with negligible area compared to the capacitor plates. Thus identical plate distan-ces can be obtained with air as dielectric.

4316.80 Spacers for plate capacitor

ElectrometerThis instrument measures current in the pico-ampere range and charge down to nano-coulombs.As a pico-ampere meter it may for instance be used in photoelectric effect experiments (determi-nation of Planck’s constant). With the matching ionization chamber, it can show the weak currents which passes through air when alpha radiation makes it slightly conductive. As a nano-coulomb meter it is a most versatile tool for a lot of electrostatic experiments. The charge integration occurs within the instrument at close to zero voltage, virtually eliminating leakage currents. With a Faraday ice pail and a metal plated ball on a rod, a very persuasive

demonstration of electric induction is possible. Another application is determining the capacitance of a plate capacitor with or without a dielectric between the plates.

Full scale ranges: ±5, ±50, ±500 pA. ±5, ±50, ±500 nC.

4410.30 Electrometer

4410.35

4415.00

4425.00

4410.30

4315.20

4316.80

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U-Core with armatureLaminated U-core with armature and clamp screw. Cross-sectional area 20 x 20 mm.

4630.00 U-Core with armature

Armature, laminatedLaminated I-core. Dimensions: 20 x 20 x 83 mm.

4630.10 Armature, laminated

Armature, massiveThis massive I-core is used for demonstrating the increase in power loss when using massive cores instead of laminated types. When the massive core is used it becomes warmer than the laminated core. Dimensions: 20 x 20 x 83 mm.

4630.20 Armature, massive

Cardboard square for coilThis cardboard square has cut-outs for coils 4625.10-27. Used for demonstrating the magnetic field around a coil using iron filings.

4552.00 Cardboard square for coil

Transformer set, studentCoils for the student transformer. Made of coloured plastic with 4 mm safety jack connectors. The coil is provided with a transparent polyester foil with an effective voltage insulation up to 4500 V to reduce the risk of electric shock. Hole size: 20.5 x 20.5 mm.

No. Description Number of Windings Max. current Resistance Thread diameter

4625.10 Coil, blue 200 2 A 0.7 Ω 0.9 mm4625.20 Coil, yellow 400 1 A 2.3 Ω 0.65 mm4625.22 Coil, grey 600 0.75 A 4.3 Ω 0.56 mm4625.25 Coil, grey 800 0.5 A 9.5 Ω 0.45 mm4625.30 Coil, red 1600 0.25 A 33.3 Ω 0.34 mm4625.40 Coil, grey 3200 0.125 A 146 Ω 0.22 mm4625.17 Coil, grey 200/400 1 A 2.3 Ω 0.65 mm4625.27 Coil, grey 300/600 0.75 A 4.3 Ω 0.56 mm

4625.10-40

4630.00

4630.104630.20

4552.00

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E-Core with armatureLaminated E-core with armature. Suitable for the construction of a three-phase transformerCross-sectional area 20 x 20 mm.

4635.00 E-Core with armature

Galvanometer insertUsed to build a simple galvanometer for showing induction of current. The insert consists of a permanent magnet with an indicator needle suspended in a knife edge bearing. The unit is provided with a scale with zero in the middle. Appropriate for use with coils 4625.10-.40.

4640.00 Galvanometer insert

InductionLenz’s lawDemonstration of magnetic braking When a strong magnet rolls down the aluminium U-profile, the changing magnetic field will induce an eddy current in the U-profile. According to Lenz’s law, this current will generate a new magnetic field opposing the changes in the original field. The motion will be slowed down dramatically.Delivered with two neodymium magnets and two non-magnetic dummies of stainless steel.

4602.20 Lenz’s law

4635.00

4640.00

4602.20

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DC generator/motor model, setThis set demonstrates the basics of a DC or single phase AC generator. It also functions as a DC motor.

4760.00 DC generator/motor model, set Comprises

4708.00 Coil holder with commutator 14625.20 Coil, 400 windings *) 1 4630.10 Laminated iron core 14708.20 Contact springs 22946.35 Profile track 12946.10 Sliding saddle 44708.10 Magnet support 23305.10 Bar magnets, AlNiCo 1 set4708.30 Manual drive pulley 12037.00 Drive Belts, 4 different 1 set

*) For experiments with other winding numbers, you may also want to acquire one of 4625.10, 4625.25 and/or 4625.30.

Motor and generator models These models are well known among our customers, but have not been available as sets before. Now all the necessary parts are conveniently combined into one part number per set. The parts may also be purchased individually like before – see the following pages.(Note: Cables, power supplies and measurement or data logging equipment is not included.)The models are open for inspection and investigation by the student. As they are built mostly from standard parts they inspire the students to further experiments.

4760.00

4760.00

4120.00

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4760.60

4760.50

Three phase generator model, setStudents will easily grasp the concept of three phase electri-city when they work with this simple generator setup. To show the phase difference between the induced voltages, hook up two of the coils at a time to an oscilloscope – or even better: Use data logging to graph all three phases in one diagram.

If you have a three phase power supply (3665.55) you can ex-tend this generator set with accessory set 4760.60 in order to demonstrate three phase motors.

4760.50 Three phase generator model, setComprises:

4735.00 Coil support, three phase 13320.10 Cylindrical magnet with bearing 14625.20 Coil, 400 windings 34630.10 Armature, laminated 32946.35 Profile track 12946.10 Sliding saddle 22025.00 Motor/generator 12037.00 Drive Belts, 4 different 1 set

Three phase motor accessory setThis set is an extension to 4760.50 and allows you to demon-strate synchronous and asynchronous motors.The following items must be purchased separately: 4760.50 Three phase generator model, set; 3665.55 Three phase po-wer supply.

4760.60 Three phase motor accessory set Comprises:

4755.10 Needle on a rod 14750.10 Aluminium Ring with bearing 14750.20 Cage Armature for 3-phase motor 1

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Parts for motor and generator models

Coil holder with commutator and collectorThis item is used to build up the rotor of the motor/generator.The cylindrical brass section is divided into three sections. The top and bottom thirds are in constant contact with the coil and are used as collectors in the AC generator. The middle section is the commutator for the DC motor/generator; it reverses the polarity for every half turn.The coil holder is provided with a drive belt pulley.

4708.00 Coil holder with commutator

Commutator contact springTwo of these phosphor bronze contact springs are used in the motor/generator, each mounted on a 4708.10 Magnet support for motor/generator. The contact spring is provided with a 4 mm safety jack connector.

4708.20 Commutator contact spring

Manual drive pulleyThe handle is provided with a 10 mm diameter stainless steel axle which fits the hole in the 2946.10 sliding saddle.

4708.30 Manual drive pulley

Magnet support for motor/generatorTwo of these are used for mounting the stator magnets in the motor/generator construction. It is provided with a Ø 10 mm x 95 mm stainless steel tap. Fits 10 x 10 mm bar magnets no. 3305.10.

4708.10 Magnet support for motor/generator

Profile trackThe profile track is used with one or more sliding saddles no. 2946.10 (not included). Dimensions (L x W x H): 370 x 82 x 26 mm

2946.35 Profile track

Sliding saddle 1 holeThese are designed for convenient mounting of equipment with a maximum 10 mm diameter mounting rod. Provided with a reference line and a wing nut.Size: 35 x 50 x 84 mm

2946.10 Sliding saddle 1 hole

Drive Belts, 4 differentFour different flexible black synthetic rubber drive belts. The drive belts are oil resistant. Belt lengths: 240, 390, 580 and 780 mm.

2037.00 Drive Belts, 4 different

Coil support, three phaseThe coil support consists of a triangular Perspex plate with support for the armatures and coils. Electrical connection via 4 mm safety jack connectors. The three ground connectors are interconnected.A wing nut secures the support to the Ø 10 mm rod of a 3320.10 Cylindrical magnet with bearing (for a generator setup) or a 4755.10 Needle on a rod (for a motor setup).

4735.00 Coil support, three phase

2946.35 with 2946.10

2037.00

4735.00

4708.00

4708.20

4708.30

4708.10

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Needle on a rodConstitutes the central mounting rod for the coil support in the three phase motor models. To be used with one of the following three rotors.

4755.10 Needle on a rod

Aluminium ring with bearingRotor in the synchronous motor.

4750.10 Aluminium ring with bearing

Cage armature for 3-phase motorRotor in the asynchronous motor.

4750.20 Cage armature for 3-phase motor

Motor-generator modelA ready-to-use setup for demonstrating the generation of either direct or alternating current. Although the AC voltage from this model is not sinusoidal, is goes very well together with the full wave bridge rectifier with LEDs to demonstrate the changing directions of the current. The DC voltage is naturally pulsating.Connect the model to a power supply to make it run as a DC motor.

4706.00 Motor-generator model

4750.20

TJEK VARE-NUMMER

4750.10

4706.00

4755.10

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Ganged motorsOne of the two identical motors is used for driving the other which operates as a generator. The two 6 V DC motors are conveniently mounted on a plate provided with 4 mm safety jack connectors.

4724.00 Ganged motors

Motor on support plateThe 2-6 V DC motor is mounted on a plate with two 4 mm safety jack connectors. A drive belt pulley is supplied.Plate size: 70 x 100 mm.

4720.10 Motor on support plate

Arc discharge rodsThese are used for demonstration of high voltage and the rising of high voltage arc discharges due to heating.For safety reasons the arc discharge rods are built into an in-sulated, protected acrylic plastic tube with safety jack connec-tors. One of the rods can be adjusted horizontally to bring the rods close enough together to start the electrical arc. (Not suitable for students. High voltage transformer needed - not included).Tube: Ø 90 x 600 mm. Bottom plate: 200 x 200 mm.

4615.10 Arc discharge rods

Hand powered generatorsThe generator is mounted in a transparent plastic housing. Using a crank and a gearbox the generator can yield a power output of up to 7.5 watts. The generator unit is supplied with an E10 socket for small bulbs and leads with mini alligator clips for connection to electrolysis experiments, measuring instru-ments, electrical circuits, etc. The set consists of two hand generator units and a manual.

4716.10 Hand powered generator, set of 2

4716.10

4615.10

4724.00

4720.10

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