Detection depth is stated per material, never as one number · review
The only detector here that publishes a depth for every material it claims: wood to 19 mm (0.75 in), metal to 30 mm (1.18 in), deep scan to 38 mm (1.50 in) and live cable to 50 mm (1.97 in) at 230 V.
What the figures leave us with The best-published detector here. Four depths, four modes, and no pretense that one number covers them.
A detector that tells you what its numbers apply to.
A four-in-one multi-detector locating wood studs, metal, a deep-scan mode and live cables. Scan depths: wood to 19 mm (0.75 in), metal to 30 mm (1.18 in), deep search to 38 mm (1.50 in), and electrical cables to 50 mm (1.97 in) at 230 V. Integrated voltage detection indicating live cables by symbol and tone, stated for use before drilling. Simple operation with on/off, mode selection and a push button for calibration and measurement.
Look at the box of almost any wall scanner and one depth is printed on it. That figure is the deepest capability of the deepest mode — usually deep metal — and it has nothing to do with finding a timber stud behind plasterboard. Publishing four figures makes the tool sound worse and describes it honestly.
Standard plasterboard is 12.5 mm (0.49 in). Two layers, or one layer plus a skim and a wallpaper, and the stud is at or beyond the stated depth. That is the real limit of this class of detector, and knowing the number is what tells you when to stop trusting 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 | B0735C4B9J (identical on 6 markets) |
|---|---|
| EAN | 4029665212005 |
| Measuring mode | Wood 19 mm (0.75 in) |
| Stated dimension or range | metal 30 mm (1.18 in) · deep 38 mm (1.50 in) |
| Probe and body | live cable 50 mm (1.97 in) at 230 V |
Because the physics differs by material. A wall scanner sees metal, wood and a live cable by three different mechanisms, at three different depths. A single headline figure on a box is always the deepest of them, and it is almost never the one that applies to what you are looking for. Technoline gives all four.
It zeroes the detector on the wall in front of it. Wall construction varies enormously — plasterboard, plaster on brick, foil-backed board — and a detector that has not been calibrated on this wall is reading against an assumption.
Treat every reading as an indication, never a guarantee. Damp plaster, foil backing and metal mesh all change what the tool sees. Follow the manufacturer instructions and assume a cable may be present where the wall makes one likely.
6.8/ 10
The best-published detector here. Four depths, four modes, and no pretense that one number covers them.
A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom, United States. Listed is not the same as in stock — availability changes daily.
Details checked on August 31, 2026.
Anyone who wants to know what the depth figure means before trusting it.
Listed because the accessory names this instrument itself.
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.
Five detection modes · wood, metal and AC cable · works through several wall finishes
A five-mode wall scanner covering wood, metal and live AC cables, stated to work on lath, wallpaper, wooden floors, acoustic ceilings and painted walls.
Best for: General household scanning where the question is "is there anything there" rather than "how deep".
Metal, live cable and timber · three-color LED ring · center indication · IP54
A site-rated scanner that identifies which material it has found and rings the marking hole with a three-color LED — red on the object, yellow approaching, in an IP54 rubber housing.
Best for: Repeated drilling on site, where finding the center of the stud quickly matters more than reading a depth.
≈ $99
Transmitter plus receiver · up to 2 m (7 ft) reception depth · 7 channels · live and dead cables
Not a wall scanner but a cable tracer: a transmitter injects a signal into a conductor and a receiver follows it, to a stated depth of 2 m (7 ft), on live or dead cables.
Best for: Following one specific cable through a building, which no wall scanner can do at all.
