Socket Testers

A socket tester is a small, handheld device that is plugged into a socket to quickly confirm if an AC wall socket is working. Testers also identify if the socket is producing the power rating expected from a socket.

Socket testers are used to ensure that the wiring is the correct and can detect if there is no earth, however, cannot check if the earth is in good condition if it is there.

The simple interface features lights on the front of the tester that will light up in different combinations, this will indicate if there is a fault and show the user exactly what the fault is.

Different types of socket testers:

Simple testers can detect a number of different faults but they cannot indicate or measure the earth fault loop impedance. They are normally the same size as a 13A plug.

Advanced testers have the same normal functions that a simple tester has including reversed line and earth, or reversed line and neutral. They display the range of numerical values that the earth fault loop impedance falls.

Professional testers have the same normal functions that a simple tester has, including the numerical value of earth loop impedance reading. They also are used to measure the values of earth loop impedance to certify or report on the installation that has been carried out.

Who would use a socket tester?

Electricians, maintenance personnel, DIY enthusiasts, handymen and equipment installers would generally have a mains socket tester in their toolbox to check the safety of the socket and prevent shocks and accidents from occurring.


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Description Price Current Rating Voltage Audible Alarm Calibrated Earth Loop Impedance Test Number of Pins Wiring Check Display Type Safety Category Power Source Dimensions Weight Height Length
RS Stock No. 136-5739
BrandRS PRO
£72.00
Each
Units
30mA 230V ac - RSCAL Yes 3 Yes LED - Mains - - - -
RS Stock No. 136-5669
BrandRS PRO
£12.15
Each
Units
11mA 230V ac - - Yes 3 Yes LED - Mains - - - -
RS Stock No. 136-5670
BrandRS PRO
£22.50
Each
Units
30mA 230V ac - - Yes 3 Yes LED - Mains - - - -
RS Stock No. 136-5738
BrandRS PRO
£61.65
Each
Units
11mA 230V ac - RSCAL Yes 3 Yes LED - Mains - - - -
RS Stock No. 716-1073
Mfr. Part No.RSCP501
BrandMartindale
£68.00
Each
Units
13A 200 → 250V ac - RSCAL - 3 Yes LED CAT II 300 V Mains 65 x 65 x 47mm - 47mm 65mm
RS Stock No. 719-0885
Mfr. Part No.RSCP501
BrandMartindale
£18.50
Each
Units
13A 200 → 250V ac - - - 3 Yes LED CAT II 300 V Mains 65 x 65 x 47mm - 47mm 65mm
RS Stock No. 716-1111
Mfr. Part No.SOK 32
£79.09
Each
Units
13A 230V ac Yes RSCAL - 3 Yes LED - Mains - - - -
RS Stock No. 719-3001
Mfr. Part No.SOK 32
£29.59
Each
Units
13A 230V ac Yes - - 3 Yes LED - Mains - - - -
RS Stock No. 719-0891
Mfr. Part No.RSBZ101
BrandMartindale
£19.95
Each
Units
13A 230V ac Yes - - 3 Yes LED CAT IV 300 V Mains 65 x 65 x 47mm - 47mm 65mm
RS Stock No. 716-1082
Mfr. Part No.RSBZ101
BrandMartindale
£69.45
Each
Units
13A 230V ac Yes RSCAL - 3 Yes LED CAT IV 300 V Mains 65 x 65 x 47mm - 47mm 65mm
RS Stock No. 704-8703
Mfr. Part No.SOK 36
£98.95
Each
Units
13A 230V ac Yes RSCAL Yes - Yes LED - Mains - - - -
RS Stock No. 704-7747
Mfr. Part No.SOK 36
£49.45
Each
Units
13A 230V ac Yes - Yes - Yes LED - Mains - - - -
RS Stock No. 424-8420
Mfr. Part No.CP201
BrandMartindale
£94.50
Each
Units
16A 230V ac - RSCAL - 3 Yes LED CAT III 300 V Mains 65 x 65 x 47mm 195g - -
RS Stock No. 253-535
Mfr. Part No.RSCP201
BrandMartindale
£45.00
Each
Units
16A 230V ac - - - 3 Yes LED CAT III 300 V Mains 65 x 65 x 47mm 195g - -
RS Stock No. 253-541
Mfr. Part No.RSCP301
BrandMartindale
£48.00
Each
Units
30mA 110V ac - - - 3 Yes LED CAT II 150 V Mains - 180g - -
RS Stock No. 424-8436
Mfr. Part No.CP301
BrandMartindale
£97.50
Each
Units
30mA 110V ac - RSCAL - 3 Yes LED CAT II 150 V Mains - 180g - -
RS Stock No. 776-4742
Mfr. Part No.MARPC105/32
BrandMartindale
£142.50
Each
Units
32A - - RSCAL Yes 5 Yes Front Panel CAT III 300 V Mains 131 x 94 x 54mm 292g 54mm 131mm
RS Stock No. 776-2014
Mfr. Part No.MARPC105/32
BrandMartindale
£93.00
Each
Units
32A - - - Yes 5 Yes Front Panel CAT III 300 V Mains 131 x 94 x 54mm 292g 54mm 131mm
RS Stock No. 704-8709
Mfr. Part No.SOK 34
£91.52
Each
Units
13A 230V ac Yes RSCAL Yes - Yes LED - Mains - - - -
RS Stock No. 704-7738
Mfr. Part No.SOK 34
£42.02
Each
Units
13A 230V ac Yes - Yes - Yes LED - Mains - - - -