Plaster walls can be harder to scan than drywall because their thickness and layers may vary, and some have wood or metal lath behind them. For the best chance of finding a stud, choose a scanner with enough depth for your wall and use its readings as a guide—not as a guarantee. Of these options, the Franklin Sensors ProSensor MAX stands out because its listed deep-scan capability specifically includes plaster and other thick wall materials.
Table of Contents
Quick Comparison
| Product | Key feature | Best suited for |
|---|---|---|
| Franklin Sensors ProSensor M210 | 13 sensors; detection up to 1.7 inches | Everyday scanning and showing stud width |
| Franklin Sensors ProSensor MAX | 13 larger sensors; deep mode up to 2.5 inches | Thicker plaster and layered walls |
| POROMETISTO DSF05 Wall Scanner | Detects wood, metal, pipes, and live AC wires | Checking for several kinds of objects in a wall |
| Cyber Tools Multi-Mode Wall Scanner | Multi-mode scanning and digital display | Users who want a screen and multiple detection modes |
| Franklin Sensors ProSensor M150/X990 | 9 sensors; detection up to 1.5 inches | Routine scans on walls within its stated depth |
Our Picks: Best Stud Finder For Plaster Walls reviews
Franklin Sensors ProSensor M210: A Straightforward Finder That Shows Stud Width
The ProSensor M210 uses 13 sensors and a row of LEDs to show the width of a detected stud, rather than only signaling an edge. The center LED turns green to mark the stud center, and the display can also show double studs. That broad visual cue can be useful when you need to choose a fastening point on an unfamiliar wall.
It does not require calibration: press and hold the button to scan, and the manufacturer says you can begin over a stud. Its deep scan is always on and is listed for detection up to 1.7 inches. The product is described as a drywall finder, however, so that depth specification alone does not establish that it will work through every plaster-and-lath wall.
The M210 also includes live-wire detection, a bubble level, and a pencil caddy. It runs on two AA batteries, which are not included. Compared with the ProSensor MAX, it has less listed depth and no separate deep-scan mode, but it offers a simpler option for walls that are not especially thick.
Pros:
- 13 sensors display the detected stud width and center.
- No calibration step is required.
- Includes live-wire detection, a bubble level, and pencil caddy.
- Finds wood and metal studs, according to the product description.
Cons:
- Its stated detection depth is less than the ProSensor MAX’s.
- Two AA batteries are required and are not included.
Verdict: Choose the M210 for a simple, full-width stud display on walls within its stated depth, but consider the MAX if you have thick or layered plaster.
Franklin Sensors ProSensor MAX: The Deep-Scan Pick for Thick Plaster
The ProSensor MAX is the most directly suited option here for challenging plaster walls. Its description specifically lists plaster among the materials it can scan, along with multiple layers of drywall, OSB, plywood, MDF, and large tile. The stated maximum detection depth is 2.5 inches, making it the deepest-rated model in this group.
Its 13 larger sensors and LED display are designed to indicate the full width of a stud, including single or double studs, with a green center light. There are two modes: a standard mode for typical scanning and a deep mode for thick or tough walls. No calibration is required, and the manufacturer says scanning can start over a stud.
That extra depth is useful, but it does not make every wall predictable. Plaster thickness, lath, repairs, and objects inside the wall can affect readings, so scan slowly and check the marked area more than once. The product description does not specify its battery type, which is worth confirming before you plan a project.
Pros:
- Specifically described for plaster and other layered materials.
- Listed detection depth of up to 2.5 inches.
- Two modes let you switch between standard and deep scanning.
- LEDs show stud width and indicate the center.
Cons:
- More scanning depth cannot guarantee a reliable reading through every wall construction.
- The supplied product details do not state the battery type.
Verdict: The ProSensor MAX is the strongest match for thick plaster or layered walls when you want a stud finder with plaster-specific material claims and a deep mode.
POROMETISTO DSF05: A Multi-Target Scanner for Walls and More
The DSF05 is a general-purpose wall scanner that can identify wood studs, ferrous and non-ferrous metals, water pipes, rebar, and live AC wires, according to its description. It has separate deep and exact modes for metal and foreign-object detection, with listed detection depths that vary by material. This range can be helpful when you want to check more than just the likely stud location.
Its LCD shows the detected material and location, while a signal and buzzer indicate when an object is found. The instructions call for selecting a mode, holding the scanner against the wall, waiting for the green light, and moving slowly. Sweeping back and forth can help refine the indicated center.
The listed wood detection depths are 1.50 inches in deep mode and 0.78 inches in exact mode. The supplied description does not specifically state a plaster detection depth or name plaster among the tested materials, so it is harder to judge how it will perform on thick plaster than the ProSensor MAX. It comes with a 9V battery and storage bag, and the manufacturer states a one-year replacement period for quality problems.
Pros:
- Detects several object types, including wood, metals, pipes, and live AC wires.
- LCD identifies material and displays location and depth signal.
- Deep and exact modes provide different scanning approaches.
- Includes a 9V battery and storage bag.
Cons:
- Plaster-specific performance is not stated in the supplied details.
- Its listed wood detection depth is lower than the ProSensor MAX’s maximum depth.
Verdict: Pick the DSF05 if checking for pipes and different metals matters alongside finding wood, but choose a plaster-specific deep scanner for especially thick walls.
Cyber Tools Multi-Mode Wall Scanner: A Digital Display for General Scanning
This Cyber Tools scanner is described as a multi-mode detector for wood studs and metal pipes. Its digital display shows detection results, signal strength, and the selected mode, giving you more information than a basic indicator light. The description positions it for home projects as well as trade work.
The ergonomic grip and straightforward button layout may make it easier to hold and operate during longer scans. The product title identifies it as rechargeable, but the supplied details do not specify its detection depth, whether it finds live wires, or how its modes differ. Those gaps make it difficult to compare its plaster performance directly with the Franklin Sensors models.
Because plaster is not specifically named in the product information, treat this as a general-purpose option rather than a confirmed deep-plaster specialist. It may suit someone who values a screen and multiple scanning modes, but for thick walls, stated depth and material compatibility are especially important details to verify.
Pros:
- Multi-mode detection for wood studs and metal pipes.
- Digital display shows results, signal strength, and mode selection.
- Ergonomic grip and intuitive button layout are designed for comfortable use.
- Rechargeable design, as stated in the product title.
Cons:
- The supplied details do not list a detection depth or plaster compatibility.
- Live-wire detection is not specified in the supplied description.
Verdict: Consider this scanner if you want a rechargeable, screen-based general tool, but look to the ProSensor MAX for clearer evidence of suitability for thick plaster.
Franklin Sensors ProSensor M150/X990: A Simpler Nine-Sensor Option
The ProSensor M150 uses nine sensors to show the width of a stud on its LED display. The center LED turns green to indicate the center, and the display can show double studs. Like the M210, it is designed to scan without calibration and can start over a stud, according to the manufacturer.
Its deep scan is always on and is listed for depths up to 1.5 inches. The description says it detects wood and metal studs and includes live-wire detection. That makes it a useful straightforward option for walls within its stated depth, but its product information focuses on drywall rather than plaster. For thicker plaster, the MAX has a greater stated depth and more direct material support.
The M150 requires two AAA batteries, which are not included, and the product details say it is not compatible with rechargeable batteries. Its simpler feature set may suit routine jobs, but check whether your wall thickness falls within the stated range before relying on it for plaster.
Pros:
- Nine sensors show the full stud width and center.
- No calibration is required.
- Includes live-wire detection.
- Detects wood and metal studs, according to the description.
Cons:
- Its listed depth is the lowest among the Franklin Sensors models here.
- Requires two AAA batteries and does not support rechargeable batteries.
Verdict: The M150 is a sensible basic choice for shallower walls, but it is not the best fit when your main concern is thick plaster.
How to Choose a Stud Finder for Plaster Walls
Match the Detection Depth to Your Wall
Plaster walls can be thicker and less uniform than drywall, and the lath behind the plaster may affect a scan. Compare the tool’s stated depth with the wall you need to scan. Among these picks, the ProSensor MAX lists a maximum depth of 2.5 inches and specifically names plaster. A depth rating is not a promise that every wall will scan reliably, but it gives you a useful starting point.
Look for Clear Stud-Center Indicators
A scanner that shows the full width of a stud can make it easier to choose a fastening spot than one that only signals an edge. The Franklin Sensors models use multiple sensors and LED displays to show stud width and indicate the center. On a plaster wall, make several slow passes and mark the edges and center rather than trusting one signal.
Decide Whether You Need More Than Stud Detection
If you are drilling, checking for live wires or metal pipes can be as important as finding a stud. The M210 and M150 list live-wire detection, while the POROMETISTO scanner is described as detecting live AC wires, pipes, and several kinds of metal. Detection features can help you scan more carefully, but they do not replace safe work practices or confirm that a spot is hazard-free.
Consider the Scanning Method and Display
Some devices use an LED row to show a stud’s width; others use an LCD or digital screen to show material, signal, or mode. Think about which type of feedback you can interpret quickly. Also check the operating steps: the POROMETISTO instructions call for choosing a mode, waiting for a ready light, moving slowly, and sweeping back to refine a location.
Check Batteries and Included Accessories
Battery needs differ across these models. The M210 requires two AA batteries, and the M150 requires two AAA batteries; neither includes them. The POROMETISTO package includes a 9V battery and storage bag. The supplied information does not list the ProSensor MAX battery type, while the Cyber Tools title identifies its scanner as rechargeable.
Use Repeat Scans and Confirm Before Drilling
Wall construction can create confusing or inconsistent readings, particularly when plaster has been repaired or the wall contains lath, pipes, or wiring. Scan slowly from more than one direction and compare repeated marks. Treat a stud finder as a locating aid, not a guarantee, and use extra caution before drilling into any wall.
Frequently Asked Questions
What is the best stud finder for thick plaster walls?
From these options, the Franklin Sensors ProSensor MAX is the clearest match. Its product description specifically includes plaster and lists detection up to 2.5 inches, along with a deep-scan mode. Wall construction still affects results, so repeat scans before choosing a drilling point.
Will a regular stud finder work through plaster?
It may, depending on the wall’s thickness and construction, but performance can vary. Check the product’s listed depth and whether plaster is named as a compatible material. The ProSensor MAX provides the most specific plaster-related information among the models in this guide.
Can a stud finder locate wood lath as well as studs?
A scanner may respond to materials behind the plaster, but the supplied product details do not confirm reliable identification of wood lath for these models. Do not assume that every signal marks a stud. Make slow passes, compare readings, and use other safe ways to verify a location when needed.
Should I choose a stud finder with live-wire detection?
Live-wire detection can add a useful warning when you are planning where to drill. The M210 and M150 list this feature, and the POROMETISTO scanner is described as detecting live AC wires. No detector should be treated as proof that an area is safe to drill.
Why can plaster walls produce confusing readings?
Plaster thickness and wall layers can vary, and lath, metal, pipes, repairs, or wiring may affect what a scanner detects. A single pass may not be enough to identify a stud with confidence. Slow, repeated scans can help you compare and refine the marked area.
Which option is best for checking pipes and metal as well as studs?
The POROMETISTO DSF05 is described as detecting wood studs, ferrous and non-ferrous metals, water pipes, rebar, and live AC wires. Its listed detection depths vary by material, and plaster-specific performance is not stated, so consider that limitation if your walls are especially thick.
Final Recommendation
For plaster walls, the Franklin Sensors ProSensor MAX is the best-supported choice in this group because its description specifically names plaster and lists a deeper scan than the other stud finders here. The M210 is a practical alternative for less challenging walls, while the POROMETISTO offers broader object detection. Whichever model you choose, scan more than once and verify the location carefully before drilling.
