Electrical Laboratory Instruments

AC-DC Power Supplies

Item code: 10078 

Similar but current capacity 5 Amps.

Additional Information:
  • Item Code: 10078

AC-DC Power Supplies

Item code: 10077

Gives continuously variable A.C. and D.C. outputs upto 10 A for a.c. and 8 A for d.c. A meter is provided to indicate both a.c. and d.c. voltages. An internal fuse is provided for input and a resettable cut-out for output. With detachable 1.5 metre mains lead.

Specifications :
Mains Input :220-240 V a.c. 50/60 Hz
Output Voltages :0 to 25 V a.c. and unsmoothened full wave rectified d.c.
Output current :10 A maximum a.c.: 8 A maximum d.c.
Voltage Selection :Rotary continuously variable transformer operated by a large knob on front panel.
Metering :A.c. and d.c. output voltages by a moving coil meter with selector switch to select a.c. or d.c.
Circuit protection :Mains input 3 A internal glass fuselink. Output is protected by a resettable cut-out.
Output terminals :Colour coded 4 mm sockets.



Additional Information:
  • Item Code: 10077

Alligator Clips Battery Clips

Item code: 10156
 
  • Wide jaws, toothed, strong spring Rating 5A
  • Wide jaws, toothed, strong spring Rating 50A

Auto Transformer

Item code: 10068

Continuously variable voltage transformer, comprises a toroidal wound transformer with a continuously variable output voltage 0-260 volts a.c., Input 230 volts a.c. In stout metal protected case, mounted on a metal base with two output terminals, with mains input cable.

Current rating:
  • 2 Amp
  • 4 Amp
  • 8 Amp
  • 15 Amp

Additional Information:
  • Item Code: 10068

Ballistic Galvanometer

Item code: 10120

For measurement of small quantities of electrical charge. the moving coil is suspended by a phosphor bronze strip, which carries an optically true concave mirror. The coil can be raised, lowered or set to zero by an adjusting knurled knob at top. A knob at back is provided for clampingand releasing the coil. With levelling screws. Resistance Period:
  • Sensitivity of coil 100 ohms 10-12 sec. 180 mm
  • Resistance Period Sensitivity of coil 500 ohms 10-12 sec. 400 mm

Additional Information:
  • Item Code: 10120

Battery

Item code: 10055

12 V, 34 Amphr, car type, each cell provided with external lead connection bar so that each cell can be tapped separately.

Additional Information:
  • Item Code: 10055

Battery Charger

Item code: 10057

For charging batteries. In metallic case with ammeter, switch for 6V/12V charging, with output fuse and indicator lamp. Complete with battery terminals and main cable. Operates on 230 Volts 50 Hz:
  • 2 Amps
  • 4 Amps
  • 6 Amps

Additional Information:
  • Item Code: 10057

Battery Eliminator

Item code: 10060

Housed in superior finished steel cabinets having 4 mm socket terminals, on/off switch, indicator light. double wound transformer & full wave bridge rectifiers, Input : 230 volts A.C. Output : 2,4,6,8,10 and 12 V D.C.
1 Amp.
2 Amp.
5 Amp.

Additional Information:
  • Item Code: 10060

Battery Hydrometer

Item code: 10056

For measuring density of electrolyte in leadacid cells. A hydrometer float is contained in a glass body which is provided with a rubber bulb and a nozzle.

Additional Information:
  • Item Code: 10056

BNC Connecting Leads

Item code: 10139

Interconnection leads, for BNC plug to 4 mm plug, fitted with strain relief sleeves, 1 metre long.

Additional Information:
  • Item Code: 10139

BNC To 4mm Socket Terminal

Item code: 10137

Plugs directly to BNC input socket, with two standard 4 mm socket terminals:
  • Spaced 19 mm apart Black.
  • Spaced 19 mm apart Red.

Additional Information:
  • Item Code: 10137

Cable Three Core Wire

Item code: 10220

Multistrand copper wire, PVC insulated, colour brown, blue and yellow/green

3 A6.5
6 A6.9
15 A8.1


Additional Information:
  • Item Code: 10220

Glass Cartridge Fuse Cartridge Fuses

Item code: 10234

With transparent glass body, quick blow type, 20mm long.

250mA
500 mA
1 A
2 A
3.15 A
5 A

Additional Information:
  • Item Code: 10234

Cell Holder

Item code: 10063

Rectangular plastic box with cover to hold 1.5 Volt dry cell, with sockets for output.

For one cell
For two cells
For four cells

Additional Information:
  • Item Code: 10063

Cell Holder

Item code: 10066

Improved design, stackable, rectangular plastic moulding to hold upto four dry cells beneath it, enables use of one, two, three or four cells.

Additional Information:
  • Item Code: 10066

Constantan Wire

Item code: 10193

Double enameled, SWG 48, on reel of 50 g net.

Additional Information:
  • Item Code: 10193

Contact Key Single

Item code: 10223

A spring arm, press knob, contact stud and a connecting strip with two 4 mm. terminals on plastic base of 100 x 60 mm. size.

Additional Information:
  • Item Code: 10223

Copper Wire Polyurethane

Item code: 10171
  • Net weight 16 250 g.
  • Net weight 18 250 g.
  • Net weight 20 250 g.
  • Net weight 22 125 g.
  • Net weight 24 125 g.
  • Net weight 26 125 g.
  • Net weight 28 125 g.
  • Net weight 30 125 g.
  • Net weight 32 125 g.
  • Net weight 36 125 g.

Additional Information:
  • Item Code: 10171

Copper Wire Tinned

Item code: 10170 

SWG 26, reel of 16 g. approx.

Additional Information:
  • Item Code: 10170

Crocodile Clip

Item code: 10155

With strong spring, clamping screw for wire. The shank will accept 4 mm plugs.

Additional Information:
  • Item Code: 10155

Demonstration Meter

Item code: 10088

With interchangeable scales. A versatile instrument and demonstration meter that can be converted to an a.c., or d.c. voltmeter or ammeter with selection of various ranges for each mode.With a high quality moving coil, spring controlled movement with full scale deflection of 5 mA or 100 mV d.c. The long pointer has a spade end and is clearly visible from a distance. Fitted in case with glass front and back. The instrument can be used with different dials to give different voltage and current ranges. All dials are interchangeable and each has a plug coupler to fit the instrument. The coupler connects appropriate resistors, shunts or rectifiers to convert the instrument to the range as given on the scale of the particular dial. The scales have clear bold figures and are marked on both sides to enable the lecturer also to observe the reading from the back of the instrument. A zero adjuster allows the instrument to be used for centre zero dials.One dial of range 50-0-50 mV d.c. is supplied with the instrument. In wooden case.

Additional Information:
  • Item Code: 10088

Demonstration Meter

Item code: 10089

With interchangeable scales. A versatile instrument and demonstration meter that can be converted to an a.c., or d.c. voltmeter or ammeter with selection of various ranges for each mode.With a high quality moving coil, spring controlled movement with full scale deflection of 5 mA or 100 mV d.c. The long pointer has a spade end and is clearly visible from a distance. Fitted in case with glass front and back. The instrument can be used with different dials to give different voltage and current ranges. All dials are interchangeable and each has a plug coupler to fit the instrument. The coupler connects appropriate resistors, shunts or rectifiers to convert the instrument to the range as given on the scale of the particular dial. The scales have clear bold figures and are marked on both sides to enable the lecturer also to observe the reading from the back of the instrument. A zero adjuster allows the instrument to be used for centre zero dials.One dial of range 50-0-50 mV d.c. is supplied with the instrument. In wooden case In plastic case.

Additional Information:
  • Item Code: 10089

Dials Interchangeable

Item code: 10090

For use with P64200 Each dial comprises a plastic panel with a sealed moulded capsule on one side containing appropriate shunts, or voltage multipliers:
  • 5-0-5 mA
  • 10-0-10 mA
  • 0-10 mA
  • 0-50 mA
  • 0-100 mA
  • 0-500 mA
  • 0-1 A
  • 0-5A
  • 0-10 A
  • 50-0-50 mv
  • 5-0-5 v
  • 0-1v
  • 0-5 v
  • 0-10 v
  • 0-15 v
  • 0-300 v
  • 0-10A
  • 0 -50 A
  • 0-100 mA
  • 0-500 mA
  • 0-1 A
  • 0-5 A
  • 0-10 A
  • 0-5 V
  • 0-10 V
  • 0-15 V
  • 0-50 V
  • 0-300 V

Additional Information:
  • Item Code: 10090

Digital Multimeter

Item code: 10123

3 ½ digit, LCD multimeter Range:

  • DC voltage: upto 1000 V in five ranges
  • AC voltage: upto 750 V in five ranges
  • DC current: upto 10 A in six ranges
  • AC current: upto 10 A in six ranges
  • Resistance: upto 20 Megohm in six ranges
  • Accuracy : ± 0.5% for d.c. and Resistance ranges
  • ± 1% for a.c. ranges
  • Powersupply: One 9 volt battery
  • Audible continuity check, diode check

Additional Information:
  • Item Code: 10123

Eureka Constantan Wire

Item code: 10194

Suitable for resistance coils etc.

Reel of 125g net.22
Reel of 125g net.24
Reel of 125g net.26
Reel of 125g net.28
Reel of 125g net.30
Reel of 125g net.32
Reel of 125g net.34
Reel of125g net.38
Reel of125g net.40
Reel of 125g net.42
Reel of 125g net.44


Additional Information:
  • Item Code: 10194

Eureka Constantan Wire Bare

Item code: 10181

Copper nickel alloy resistance wire, low temperature coefficient:

  • Reel of 125g.
  • Reel of 125g.
  • Reel of 125g.
  • Reel of 125g.
  • Reel of 125g.
  • Reel of 125g.
  • Reel of 125g.
  • Reel of 125g.
  • Reel of 125g.
  • Reel of 125g.
  • Reel of 125g.

Additional Information:
  • Item Code: 10181

Flash Lamp Bulb Lens End

Item code: 10251

2.2 V, 0.25 A, lens end, M.E.S. cap.

Additional Information:
  • Item Code: 10251

Flash Lamp Bulb Round

Item code: 10245
  • 1.25 V
  • 2.5 V
  • 3.5 V
  • 4.5 V
  • 6 V
  • 12 V

Additional Information:
  • Item Code: 10245

Flexible Leads PVC

Item code: 10140

Insulated, with crocodile clip at each end.

LengthColour
250 mm.Black
250 mm.Red
500mm.Black
500 mm.Red
750 mm.Black
750 mm.Red

Additional Information:
  • Item Code: 10140

Flexible Leads PVC

Item code: 10146

Insulated with 4 mm plug at one end and crocodile clip at the other.

LengthColour
250 mm.Black
250 mm.Red
500 mm.Black
500 mm.Red
750 mm.Black
750 mm.Red

Additional Information:
  • Item Code: 10146

Flexible Leads PVC

Item code: 10152
As above with 4 mm plug at both ends.

Additional Information:
  • Item Code: 10152

Fuse Holder

Item code: 10240

To take above fuses of 20 mm length.

Additional Information:
  • Item Code: 10240

Fuse Wire

Item code: 10241

Tinned copper 100g.:

  • reel Fusing Current 2 A
  • reel Fusing Current 5 A
  • reel Fusing Current 10 A
  • reel Fusing Current 15 A

Additional Information:
  • Item Code: 10241

Transparent Polysterene Container

Item code: 10045 
  • 2 Volt 20 Amphr
  • 2 Volt 30 Amphr

Additional Information:
  • Item Code: 10045

Insulated 4 Mm Socket

Item code: 10126

With molded captive head, 4 mm. socket, plastic body, nut and washers. Will also clamp wire and spade terminals.

Additional Information:
  • Item Code: 10126

Insulated Socket

Item code: 10131

4mm single socket for flexible leads, with screw connection for wire, hard plastic body.

Colour:
  • Black
  • Red
  • Black
  • Red

Additional Information:
  • Item Code: 10131

Knife Switch

Item code: 10229

Low voltage, moulded base with plated contacts and screw connections. Single pole double throw.

Additional Information:
  • Item Code: 10229

Knife Switch

Item code: 10230

Low voltage, moulded base with plated contacts and screw connections. Double pole double throw.

Additional Information:
  • Item Code: 10230

Knife Switch

Item code: 10231

As above, but mounted on insulated plate with three 4 mm socket terminals. Single Pole Double Throw.

Additional Information:
  • Item Code: 10231

Knife Switch

Item code: 10232

As above, but mounted on insulated plate with three 4 mm socket terminals. Double Pole Double Throw.

Additional Information:
  • Item Code: 10232

Lamp & Scale Outfit

Item code: 10122

Suitable for use with reflecting galvanometer, provided with adjustment in any direction and fitted with 6 volt lamp which work on 230 volts a.c. with the help of stepdow transformer provided in base. The universal lamp and scale is fitted on heavy base with chromium plated rod. Complete with perspex scale calibrated 250 - 0 - 250 mm and 0 - 500 mm. The scale carrier is of improved design permitting lateral adjustment and provides full scale view over the entire length.

Additional Information:
  • Item Code: 10122

Lamp Low Voltage

Item code: 10252

With double contact:

  • S.B.C. 6 V 36 W
  • S.B.C. 12 V 24W
  • S.B.C. 12 V 36 W

Additional Information:
  • Item Code: 10252

Lamp Low Voltage

Item code: 10255

With straight axial filament, double contact:

  • 6V 36W.
  • 12V 24W.
  • 12V 36W.

Additional Information:
  • Item Code: 10255

Lamp Holder M E S

Item code: 10261

Rolled shell of brass mounted in moulded plastic base.

Additional Information:
  • Item Code: 10261

Lampholder M E S Mounted

Item code: 10262

Fitted on base with two 4mm sockets.

Additional Information:
  • Item Code: 10262

Multi Plate Type Plastic Container

Item code: 10049
  • 2 Volt 20 Amphr.
  • 2 Volt 45 Amphr.
  • 2 Volt 60 Amphr.
  • 2 Volt 75 Amphr.
  • 6 Volt 12 Amphr.
  • 6 Volt 20 Amphr.

Additional Information:
  • Item Code: 10049

Multimeter Analogue

Item code: 10125

This is a high sensitivity pocket size circuit tester equipped with a meter movement of 175 micro amperes sensitivity. Pin-jack range selection system entirely eliminates mechanical switching troubles. The internal batteries measure resistance from 2 ohms upto 1 M ohms.

Range :

DC voltage :0.25/10/50/250/1000V
(4K ohm/V) ± 3%
AC voltage :10/50/250/500/1000V
(2K ohm/V) ± 4%
AC current :0.25/10/250mA ±3%
Resistance :0-10K/1M ohm
(min.2 Ohms & max.1M ohm).
DB :-20 to + 22, +20 to + 36
Battery :1.5 V (UM-3) x 2
Capacitance :0.0001 (100pF) to 0.03μF
0.01-0.6μF

Inductance :

10 to 1000H


Additional Information:
  • Item Code: 10125

Nichrome Wire Bare

Item code: 10211

Reel of 125g net.18
Reel of 125g net.20
Reel of 125g net.22
Reel of 125g net.26
Reel of 125g net.28
Reel of 125g net.30
Reel of 125g net.32

Additional Information:
  • Item Code: 10211

Plug Switch One Way

Item code: 10225

Two brass blocks with 4mm insulated terminals are mounted on a moulded base, an accurately tapered plug with a fluted top fits into the tapered hole between the two blocks, ensuring very low contact resistance.

Additional Information:
  • Item Code: 10225

Plug Switch Two Way

Item code: 10227

With three brass blocks, each with a 4mm insulated terminal and two standard tapered plugs to fit the two holes between the blocks.

Additional Information:
  • Item Code: 10227

Plugs Transverse Hole

Item code: 10129

4mm, with screw connection for wire and 4mm transverse hole for extra connection, moulded in flexible plastic Black.

Additional Information:
  • Item Code: 10129

Plugs Transverse Hole

Item code: 10130

4mm, with screw connection for wire and 4mm transverse hole for extra connection, moulded in flexible plastic Red.

Additional Information:
  • Item Code: 10130

Power Supplies Regulated Analogue

Item code: 10082

As above but output indication is through separate analogue meters.

Capacity:

1 Amp.
2 Amp.
5 Amp.

Additional Information:
  • Item Code: 10082

Power Supplies Regulated Digital

Item code: 10079

These power supplies are D.C. regulated, stabilized, short circuit and overload protected, easy and safe to use as a power source for electronic equipment. The power supply can be operated in either constant voltage or constant current mode. Both voltage and current are precisely regulated with low output ripple.Voltage and current readings are displayed on two separate 3½ digit meters. Output voltage, single or double, is continuously adjustable from 0 to 30 volts by coarse and fine controls.

Specifications :

Meters :3½ digital panel meters separately for voltage and current
Accuracy of DPM :± 0.2% of readings, ±2 least count.
Regulation :± 0.05% for current ± 0.05% for voltage
Ripple :less than 3 mv r.m.s.
Input Voltage :230 volts ±10%, 50 Hz. Capacity 1 Amp.

Additional Information:
  • Item Code: 10079

Power Supply EHT

Item code: 10086

The unit provides a continuously varible E.H.Toutput from o to 5 kV d.c. with a low voltage output of 6.3volt d.c. and is ideal for vacuum tubes etc. This unit uses a low voltage transistor inverter circuit and E.H.T. transformer. The high a.c. voltage is rectified and smoothened. A meter calibrated 0 t0 5 kV is connected to control the output voltage.

Output :

  • E.H.T.-0 to 5 kV d.c., continuously variable. 
  • Terminal output voltage indicated by meter. 
  • Max short circuit current is safely at 3 mA.
  •  A heater supply 6.3 V a.c. at 4 A is fully isolated & insulated for 5 kV.

Protection :

Mains 500 mA antisurge fuse, Output overload protected, E.H.T. max current limited to 3 mA.

Additional Information:
  • Item Code: 10086

Power Supply 12v AC And DC

Item code: 10072

1 Amp, 2 Amp, 5 Amp
Specifications:
Mains input :220-240V 50/60 Hz
Output voltage :0 to 12 V A.C. in 2V steps. full wave rectification. 0 to 12 V D.C. in 2V steps
Protection :Both outputs are provided with overload protection



Additional Information:
  • Item Code: 10072

Spectrum Tubes Power Supply

Item code: 10087

Suitable for spectrum tubes, output continuously variable from 0 to 5 kV / 3 milliamps. fitted with on/off switch, colour coded output terminals. Operates on230 V A.C. 50 Hz.

Additional Information:
  • Item Code: 10087

Power Supply H T

Item code: 10085

General purpose H.T. unit for use with thermionic tubes etc. provides two continuously variable d.c. outputs of 0-25 V and 0 - 300 V and a fixed a.c.output of 6.3 V for valve heaters. The two d.c. voltages are continuously and independently variable. Three meters are provided for reading HT, Bias and LT voltages.

Specifications:
Mains Input :220 -240 V, 50/60 Hz
HT :0 to 300 V d.c. at 30 mA
Bias :0 to 25 V d.c. at 5 mA.
LT :6.3 V a.c. at 2 Amps.
Load regulation ht :± 1%
Line regulation HT :± 0.5%
Output terminals :Colour coded 4 mm sockets with one green socket for earthing.

Metering :

Three meters to measure HT volts, HT current, Bias voltage.

Additional Information:
  • Item Code: 10085

Projector Lamp Auto Type

Item code: 10258

6 V 21 W S.B.C. cap, straight transverse filament, for use in horizontal or vertical position.

Additional Information:
  • Item Code: 10258

Projector Lamp Halogen

Item code: 10259
  • 24 V 150W
  • 24 V 250W

Additional Information:
  • Item Code: 10259

Reversing Key

Item code: 10233 

To change polarity rapidly. A plastic bar with two terminals and two brushes is pivoted to rotate over two contact strips so that its rotation reverses polarity of connections on the base.

Additional Information:
  • Item Code: 10233

Smoothing Unit

Item code: 10075

For use with power supplies. A capacitance / inductance / capacitance filter reduces ripple contents to better than ±1% on full load.

  • Maximun input : 50 V d.c.
  • Maximum output.
  • current : 4 Amp.
  • Circuit Protection: 5 Amp fuse in output circuit.

Additional Information:
  • Item Code: 10075

Socket For Banana Plug

Item code: 10128

4mm hard plastic, with fixing nut screwed in plastic body.

Additional Information:
  • Item Code: 10128

Spade Connectors

Item code: 10154

With hooked blade, insulated sleeve and screw for connection to wire, pack of ten.

Additional Information:
  • Item Code: 10154

Spade Terminal Adapter

Item code: 10135

Spade shaped standard terminal with 4 mm socket connector to convert screw terminal for use with 4 mm plug connection.

Colours:
  • Black
  • Red

Additional Information:
  • Item Code: 10135

Spot Galvanometer

Item code: 10119

High sensitivity, very useful as null detector. Housed in sturdy plastic case with in-built lamp and scale arrangement, taut band type movement, with Alcomax magnet, clamp and free arrangement for safe transportation, easy replacement of the 6V lamp, working on 220V a.c. with internal transformer. With a rotary switch for selecting any of the five shunt powers 1,1/10, 1/100, 1/1000, and short circuit.

Galvanometer resistance :125 ohms
Current per mm deflection :5 x 10-8
Volts per mm deflection :6.25 x 10-6
Critical damping resistance :1000 ohms



Additional Information:
  • Item Code: 10119

Step Down Transformer

Item code: 10076

12V/36 watt for ray box or other experiments.

Additional Information:
  • Item Code: 10076

Test Prods

Item code: 10153

A pair of black and red prods with 4mm leads, tough plastic body.

Additional Information:
  • Item Code: 10153

Transformer

Item code: 10067

With 240 V A.C. mains input, this transformer provides outputs of 2, 4, 6 8 and 12 V at 8 A (96 VA maximum power loading) via 4 mm sockets, thus covering most low voltage a.c. requirements. Complete with 1.5 metre detachable 3 core mains cable.

Additional Information:
  • Item Code: 10067

Wire Flexible Single Copper Wire

Item code: 10218

20 SWG copper wire, PVC insulated, in multiple of 10 meters.

Additional Information:
  • Item Code: 10218

Wire Flexible Twin

Item code: 10219

Multistrand copper wire, PVC insulated, to carry 2 A. in multiple of 10 metres.

Additional Information:
  • Item Code: 10219
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