Best Stud Finder for Plaster Walls of 2026

On a plaster wall, the useful signal is often a lath nail, and the StudPoP is built around telling you when its magnet has found one. The magnet sits in a small spring-loaded body; when it passes a nail or screw, the popper lifts and clicks instead of asking you to feel a faint tug. That is the detail that makes it our top pick for plaster and lath. We prefer it to a plain magnet for quick work because the tool tells you what it has found, so you can keep your eyes on the wall.

At 1.5 inches square and just over an ounce, it disappears into a pocket. The maker lists wood studs, metal studs, plaster, tile, and double-layer sheetrock, and that breadth is what plaster asks for. There are no batteries and no calibration, so it is always ready. We also like the finger-friendly size for scanning a long wall without wrist fatigue.

The catch is that it is still a magnetic finder: it needs a nail or screw to react to. The 1-inch magnet is also modest beside the 27-pound Stud Ball. For old walls where lath nails are present, though, the click and the simple design are worth more than the extra pull. That is the trade we make for a tool this easy to carry and use.

A lath nail is a small target, but it is a solid one, and the CH Hanson pair is built to grab it. Each pocket-sized body has a strong magnet that sticks to the fastener holding the lath to a stud; once it grabs, it stays put while you mark. That is why this two-pack earns a place on plaster walls even though it has no screen, no beep, and no calibration.

The two tools matter more than they sound. You can leave one stuck on a nail as a reference and use the other to check the next point, or keep one in the toolbox and one in a drawer. The soft-grip body is comfortable, the 1-inch detection depth is enough for typical mud and tape, and there are no batteries to die. We also like the compact size for a pocket or a small tool bag.

The limit is that 1-inch depth: very thick plaster can put a fastener out of reach, and the Franklin 710+ is the better choice when you need a full-width electronic picture. For ordinary lath, the twin magnets are quicker and less fussy. That is the role we give this set: a low-cost, no-battery way to find the nail line before the drill comes out.

Twenty-seven pounds of pull is a lot for a stud finder, and the Rack-A-Tiers Stud Ball uses it well. The spherical shape puts a strong rare-earth magnet in a body small enough to roll across a wall, while the finger loop gives you something to hold. That combination makes it the strongest magnetic option here for thick plaster, ceramic tile, and plywood paneling.

The ball is 1.6 ounces, so it is easy to keep in a pocket or on a lanyard. It does not need batteries, and it does not need calibration. On old walls, the strong pull means it can grab a buried fastener that a weaker magnet slides past. We liked the way the round body lets you work in short arcs instead of dragging a flat block over the plaster.

It only tells you where metal is, with no stud-width readout, and it can be small enough to misplace in a deep toolbox. We think the extra pull earns its place on tile and heavy plaster, but for routine lath the cheaper StudPoP is easier to read. The Stud Ball is the specialist in this group, not the everyday default.

A row of lights that spans the whole stud is the feature that makes the Franklin 710+ feel different from a beeping scanner. Its 13 sensors read across the wall at once, then light up the stud's width and center. There is no calibration step: press the button, slide, and watch the display. The 1.6-inch scan depth is the deepest figure in this group, which is the number that matters when plaster and lath sit between you and the framing.

We think this is the electronic scanner to choose for plaster. The full-width view takes the guesswork out of which side of the stud you are on, and the built-in bubble level and ruler are genuinely useful when you are marking a line for a shelf or cabinet. It also finds wood and metal studs in the same pass, so you do not have to switch modes.

The body is 7.25 inches long and 6.4 ounces, so it is a two-hand tool on a ladder. Durability is the other caveat: some units stop working after light use, so keep the receipt and test it on a known stud. Those are real annoyances, but the full-width view is still the reason to put up with the bulk.

A live-wire warning is the feature that separates the M150 from the cheaper electronic scanners. Its 9 sensors show the stud's full width, and a lightning symbol lights when it senses current nearby. The 1.5-inch scan depth is a touch less than the 710+, but the body is smaller and easier to handle. We recommend it when you want a second safety check without a lot of bulk.

The display is the same idea as the bigger Franklin: a row of lights shows both edges and the center, so you can mark a stud without hunting for the beep. No calibration is required, and the tool finds wood and metal studs. At 5.51 by 2.99 by 2.01 inches, it fits in a drawer and is less awkward overhead than the 710+.

The live-wire warning is a warning, not a guarantee; shut off the breaker before you drill near wiring. The 1.5-inch depth also gives up a little reach to the 710+, which matters on very thick plaster. For the size, those are fair trade-offs. We like it as the compact electronic option for plaster, with the 710+ reserved for the deepest walls.

The Jurgen K puts five modes on a clear LCD, including 1/2-inch, 1-inch, and 1.5-inch stud scans plus metal and AC wire detection. That is a lot of scanner for a budget tool, and the screen shows the stud's center and edges rather than making you decode a row of blinking lights. The audio alarm is loud enough to hear over a job-site radio.

It is 9.6 ounces and 8.39 inches in the package, so it is not the pocket tool that the magnetic finders are. The non-slip grip helps, and the controls are simple enough to learn on a first project. It also detects pipes, which is useful in an old house where the plumbing may not follow the framing.

For a first electronic finder, the display and five modes do most of the work. The center-and-edge readout is easier to act on than a beep, and the 1.5-inch deep scan is enough for typical plaster. We recommend it as a low-cost way to add a screen and wire warning to a plaster-wall kit, with the Franklin M150 as the smaller step up.

The JAXWQ is the lowest-priced electronic scanner here, and it still gives you an LCD, center-and-edge readings, deep and metal modes, and a live-wire warning. For a first tool or a spare, that is a useful package. The screen is bright and shows the stud position in a way that is easier to read than a row of LEDs.

At 8.1 ounces and 7.8 inches in the package, it is a two-hand tool for overhead work. The controls are simple, and the display is clear enough to use in a dim closet. It also has a battery-level indicator, which is a small thing until you are on a ladder with a dead tool.

Calibration is the part to take seriously: press the button on a clear section, wait for the screen to settle, and scan slowly. On a plaster wall, confirm every mark with a second pass or a magnet before you drill. The extra minute is worth it.

We see it as a starter or a spare rather than the tool we reach for first. The price is the reason to consider it, and the LCD is the reason it is usable. If you already own a magnetic finder, this is a low-cost way to add a screen and wire warning to the kit.