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Q: What is the difference of the 103 skt tester? Apart from 30 quid?

The 107 does a rough loop test ,green for less than 1.8 ohms ,and a mains reversed test.Also most usefully is the RCD test. It's great for turning the right circuit off on poorly labelled boards.If your regularly work on maintenance it worth every penny in time saved and annoyed customers .

Q: used this only a few times and now and suddenly the amber on the earth keeps flashing in every socket i try?

It may just be that the socket is old or the earth connections are loose. I’ve replaced the sockets that had amber light and now they’re fine.

Q: Does this tester ever need calibrated?

No. It should only be used to confirm polarity and earth continuity plus the correct operation of RCDs. For BS7671 testing a calibrated instrument should be used giving the trip time in milli-seconds. It should be checked periodically against a known source for future use.

Q: Is this more suited for a professional electrician?

This is a handy piece of kit to have in your tool box in my view whether you're a professional electrician or DIY - provided you know what your doing. It's a better tool than the ordinary plug in tester which only checks polarity and earth problems etc. This tool tests much more and although more expensive is well worth the money.

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Description

⚡ Stay wired right, every time — don’t get caught off guard!

RCD FUNCTIONALITY CHECK - Measures RCD trip current to confirm your residual current devices are working perfectly.
INTUITIVE LED TONE ALERTS - Red/green LEDs combined with distinct continuous or warble tones ensure you never miss a fault.
COMPACT LIGHTWEIGHT DESIGN - At just 80g and pocket-sized, it’s the ultimate on-the-go tool for professionals who demand precision.
PLUG PLAY SAFETY ASSURANCE - Simply insert into any UK socket for immediate, automated wiring checks—no setup needed.
COMPREHENSIVE LOOP POLARITY TESTING - Beyond basic testers, it verifies earth loop integrity and mains polarity for total peace of mind.

The Loopcheck 107 is a professional-grade UK mains socket tester that automatically evaluates wiring status, earth loop return path, polarity, and RCD functionality. Featuring clear LED indicators and audible tones, it delivers instant, reliable diagnostics in a compact, lightweight design—perfect for electricians and safety-conscious pros.

Specifications

Manufacturer	Kewtech
Part Number	LOOPCHECK107
Product Dimensions	5.5 x 7.2 x 6.4 cm; 80 g
Item model number	Loopcheck 107
Size	No Size
Colour	Grey
Style	Single
Material	Plastic
Power Source	AC
Item Package Quantity	1
Number of Pieces	1
Measurement Accuracy	1
Certification	ul
Included Components	1 x Loopcheck 107
Batteries included?	No
Batteries Required?	No
Item Weight	80 g

Have a Question? See What Others Asked

What is the difference of the 103 skt tester? Apart from 30 quid?

used this only a few times and now and suddenly the amber on the earth keeps flashing in every socket i try?

Does this tester ever need calibrated?

Is this more suited for a professional electrician?

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