Three lamps find wiring faults; they do not find a bad earth · review
A battery-free socket tester for Schuko outlets that trips a 30 mA RCD directly from its test button — nothing to go flat, nothing to forget.
What the figures leave us with The dependable one. No display, no battery, no state in which it looks fine and is not.
The simplest instrument in this hub, and the argument for simplicity.
For fast checking of Schuko sockets, entirely without batteries. A test button that trips a 30 mA RCD directly.
It is the same argument as the two-pole voltage testers above: an instrument that draws its indication from the circuit under test has no state in which it appears dead because it is dead. For a tool used a few times a year — which is exactly how a socket tester is used — that removes the most likely failure by construction.
No number. The LCD testers in this hub read the supply voltage and quantify leakage, and this does neither. It answers the wiring question and the RCD question, which are the two questions socket testers exist for.
No such listing: the American Amazon shop answers the reference with a search box rather than a page.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
| Amazon reference | B0GVP4NMS6 (identical on 4 markets) |
|---|---|
| EAN | 9120037337106 |
| Power | Battery-free |
| Faults detected | Schuko sockets |
| Functions | trips a 30 mA RCD from a test button |
It draws the current for its indicators from the socket it is testing. That is why it cannot go flat, and also why it cannot display a voltage — there is no measuring circuit, only indication.
It is the residual current the test button injects, matching the rating of the common domestic RCD. PANCONTROL states the button trips a 30 mA device directly.
For finding reversed conductors and a missing earth, yes — that is what socket testers were invented for. For knowing whether the supply is sagging, no, and the LCD testers in this hub cover that.
7.8/ 10
The dependable one. No display, no battery, no state in which it looks fine and is not.
A reference exists on these Amazon stores: France, Germany, Italy, Spain. Listed is not the same as in stock — availability changes daily.
Details checked on August 31, 2026.
The tester that lives in the bag for a year and works when you finally reach for it.
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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