Three lamps find wiring faults; they do not find a bad earth · review
A socket tester with an LCD showing the actual voltage, six wiring fault indications, an RCD trip test and a leakage measurement — the fullest function list in this hub, at the lowest price.
What the figures leave us with The most capable socket tester here and the cheapest. The LCD is what makes it worth carrying over a three-lamp unit.
A socket tester that measures as well as indicates.
Socket wiring sequence testing, phase-to-neutral voltage measurement, leakage measurement, and indication of six types of fault. An LCD display showing clearly whether the socket is correctly wired. Battery-powered, plug-in operation described as usable by non-specialists.
A classic socket tester is three neon lamps and a legend, and it finds reversed conductors and a missing earth in two seconds. What it cannot do is tell you the supply voltage, quantify a leakage, or distinguish a good earth from a poor one. This one adds the first two.
Judge the earth. A connection with tens of ohms of resistance lights the same lamp as one with a fraction of an ohm, and only the second will clear a fault. That measurement belongs to a loop impedance tester and to the person qualified to interpret it.
Catalogued and unsold: the American Amazon shop lists the reference with nobody behind it.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
| Amazon reference | B0FJR8MYRR (identical on 5 markets) |
|---|---|
| EAN | 4895232028108 |
| Faults detected | Six fault types |
| Functions | RCD test · leakage measurement |
| Display | LCD voltage display |
The quality of the earth. A high-resistance earth connection still lights the lamp, and the tester cannot distinguish it from a good one. That measurement needs a loop impedance tester, which is a different instrument.
It draws a small deliberate fault current to make the RCD trip, confirming the device operates. Note that it will disconnect the circuit — and possibly others — so it is not a test to run casually on a working installation.
A lamp pattern says the wiring is correct. A number says whether the supply is at 230 V or sagging, which is a different fault and one a pattern cannot show.
7.4/ 10
The most capable socket tester here and the cheapest. The LCD is what makes it worth carrying over a three-lamp unit.
A reference exists on these Amazon stores: France, Germany, Italy, Spain, United States. Listed is not the same as in stock — availability changes daily.
Details checked on August 31, 2026.
Checking a whole property quickly, where reading the actual voltage saves a second trip with a multimeter.
Amazon reports what buyers took in the month before this page was last checked: at least 50.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Specifications: the manufacturer sheet for measuring instruments and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
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