Socket Testers & Adaptors

A must-have for your electrical toolkit! Just insert one of these testers into a socket and it'll tell you what's wrong with the wiring using audio/visual feedback. We also stock socket adaptors for use with digital multimeters and other testers.

Find out more about Socket Testers & Adaptors below.

Martindale CP501 13A Electrical Socket Tester MARTST1
In Stock : Get It Next Working Day*
Martindale CP501 13A Electrical Socket Tester MARTST1
£12.95
£15.54 inc. vat
  • Special design for quick installation and removal
  • Straightforward and quick to use
  • Lightweight and portable
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Martindale SB13 SafeBreak R2 Socket Test Adaptor See SS130
In Stock : Get It Next Working Day*
Martindale SB13 SafeBreak R2 Socket Test Adaptor See SS130
£13.50
£16.20 inc. vat
  • Test all wall socket plugs and outlets
  • Take quick R1 and R2 measurements
  • Compatible with any meter that has a 4mm plug
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Martindale BZ101 Buzz-IT 13A Electrical Socket Tester c/w Buzzer
In Stock : Get It Next Working Day*
Martindale BZ101 Buzz-IT 13A Electrical Socket Tester c/w Buzzer
£14.45
£17.34 inc. vat
  • Fast and easy
  • Audible signal
  • Three LEDs
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Martindale CP520 240V Socket Tester with Earth Socket
Martindale CP520 240V Socket Tester with Earth Socket
£19.99
£23.99 inc. vat
  • 4mm earth connection
  • Guarantee good earth
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Martindale EZ165 Advanced Socket & Non-trip Earth Loop Tester
In Stock : Get It Next Working Day*
Martindale EZ165 Advanced Socket & Non-trip Earth Loop Tester
£43.50
£52.20 inc. vat
  • Capable of detecting twenty-eight fault conditions
  • An advanced socket tester as defined by the Health & Safety Executive
  • Verifies earth wiring using a non-trip earth loop test
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Martindale CP201 250V Industrial Check Plug
In Stock : Get It Next Working Day*
Martindale CP201 250V Industrial Check Plug
£45.00
£54.00 inc. vat
  • Simple to use; just plug it into any socket
  • Fitted with a standard blue pin plug
  • LED lights show you if there is a problem
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Martindale EZ365 Advanced Socket Tester
In Stock : Get It Next Working Day*
Martindale EZ365 Advanced Socket Tester
£46.50
£55.80 inc. vat
  • Verifies the earth wiring
  • Advanced Socket Tester
  • Detects 28 socket wiring fault conditions
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Martindale CP301 110V Industrial Socket Tester
In Stock : Get It Next Working Day*
Martindale CP301 110V Industrial Socket Tester
£47.95
£57.54 inc. vat
  • 110V industrial plug connector
  • Shows wiring status using LEDs
  • Essential for industrial applications
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Martindale BZ701 Audible Socket Tester with Mains Polarity Check (240V)
Martindale BZ701 Audible Socket Tester with Mains Polarity Check (240V)
£48.89
£58.67 inc. vat
  • Indicates twenty-eight different fault conditions
  • Super bright LEDs
  • Determines correct and incorrect polarity of the incoming mains supply
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Martindale PC104 Series 3-Phase Industrial Socket Tester, 4-Pin
In Stock : Get It Next Working Day*
Martindale PC104 Series 3-Phase Industrial Socket Tester, 4-Pin
£79.00
£94.80 inc. vat
  • Four-pin connector plug
  • LED indicators
  • Six wiring condition checks
  • 16A, 32A, or 63A models
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Martindale PC105 Series 3-Phase Industrial Socket Tester, 5-Pin
In Stock : Get It Next Working Day*
Martindale PC105 Series 3-Phase Industrial Socket Tester, 5-Pin
£82.00
£98.40 inc. vat
  • Five-pin connector plug
  • LED indicators
  • 7 wiring condition checks
  • 16A, 32A, or 63A models
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Martindale EZ650 Socket Tester Kit with Earth Loop Test
Martindale EZ650 Socket Tester Kit with Earth Loop Test
Discontinued
  • Measures earth loop impedance of up to 500 ohms
  • Uses a simple system of lights to indicate problems with the socket
  • Tester and accessories housed in a durable carry case
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Martindale Extension Lead Tester
Stock Due : Estimated 1-2 Weeks
Martindale Extension Lead Tester
£110.40
£132.48 inc. vat
  • Operates in up to 80% humidity
  • Compatible with all PAT testers
  • Frequencies between 50 and 60Hz
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Martindale MARLTDV Extension Lead Tester
Martindale MARLTDV Extension Lead Tester
£115.00
£138.00 inc. vat
  • Test voltages of 110V +/- 10% and 240V +/- 10%
  • Between 50 and 60Hz
  • Requires minimal input from the operator
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Martindale EZ664 Advanced Socket Tester
Martindale EZ664 Advanced Socket Tester
£159.00
£190.80 inc. vat
  • Detects multiple wiring fault conditions
  • Out-of-tolerance voltage indication
  • Non-trip earth loop impedance test, 6 discrete levels
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About Socket Testers & Adaptors

Socket testers are an essential part of any electrician's toolkit, and allow users to quickly and easily evaluate the internal wiring of a socket without the need to remove the socket faceplate and potentially cause damage to the installation.

Generally extremely cost effective and cheap, socket testers are also incredibly simple to use, and require the user to simply insert the tester into a socket and the tester will do the rest. Depending upon the type of socket tester used the way information is communicated will be different; some socket testers use LED indicators to show wiring status, while others use the audible indication to show correct wiring/problems with the installation. Some also use a combination of audible and visual indicators, allowing users to quickly tell if there's a problem with a socket or not.

The visual indicators of socket testers are perhaps the handiest part of the tester. These often come with exact representations of what's wrong with the wiring, so if live earth was reversed, for example, the tester would illuminate with a combination that denotes this problem. Most socket testers also include a handy reference guide on the front so users can determine what exactly the different LED indicators mean.

This section also contains socket adaptors; these differ from socket testers as they are designed generally to be inserted into a socket and the user then uses another tester such as a multimeter and a set of test leads to carry out socket testing. They can also include socket testers attached to specific plugs, such as those plugs used in industrial applications.

Most socket testers and adaptors available in-store come with standard UK three-pin plug connectors (except if they are designed for specific sockets such as the aforementioned industrial sockets).