Three lamps find wiring faults; they do not find a bad earth · review
A socket tester stating CAT II 300 V — the only socket tester here that publishes a category — with six LED indications and a one-button RCD trip test.
What the figures leave us with The rated one. Same functions as its neighbors and the only listing that says where it belongs.
Six lamps, an RCD button, and the category printed on the page.
Six clearly readable LED indications for immediate state recognition, stated as legible even in poor conditions. A one-button RCD test that simulates a fault current and trips the protective device. Plug-and-play operation covering voltage check, wiring analysis and RCD test, described as usable by non-specialists. CAT II 300 V, stated as compliant for professional use.
Categories describe where in an installation an instrument may safely be used. CAT II covers appliances and socket outlets; CAT III covers fixed installation and distribution boards. A socket tester plugs into a socket, so CAT II 300 V is exactly the rating it should carry — and a higher-sounding number would not make it a better tool.
That is worth saying because the instinct is to read categories as a quality ladder. They are a location statement.
The lamps confirm that the conductors are where they should be. They do not confirm that the earth conductor is capable of carrying a fault current. No socket tester does.
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 | B0DD462X4T (identical on 5 markets) |
|---|---|
| EAN | 0797457718717 |
| Measurement category | CAT II 300 V stated |
| Faults detected | six fault types |
| Illumination | six LEDs |
| Functions | one-button RCD test |
It is the category that describes socket-outlet level work, so yes — a socket tester rated CAT II 300 V is rated for exactly where it plugs in. GOMETY states it; we report the marking without assessing conformity.
The tester passes a small deliberate fault current to earth, which should make the RCD trip. Everything on that RCD loses power, so do not press it without knowing what is downstream.
Yes, the maker states an LCD voltage display alongside the six-LED wiring indication.
7.8/ 10
The rated one. Same functions as its neighbors and the only listing that says where it belongs.
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.
The socket tester to buy if you want to know where the instrument is rated to be used.
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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