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BOSCH

BOSCH GMS 120 Wall Scanner with Modes for Wood, Metal, and Live Wiring, Includes 9V Battery, Hand Strap, & Pouch

  • Based on 4,375 reviews
Condition: Used - Very Good
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Availability: Only 1 left in stock, order soon!
Fulfilled by US Seller/We ship from USA
Arrives Jul 12 – Jul 29
Order within 14 hours and 38 minutes
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Style: 9V Battery


Features

  • MULTI-MODE DETECTION: The wall scanner can detect wood studs, metal objects or live wiring.
  • DETECTION STATUS: An illuminated ring indicates detection. Green indicates no object found, orange indicates object near and red indicates object found.
  • AUTOMATIC CENTER FINDER: The scanner has an automatic center finder for locating the center of detected wood or metal object.
  • ILLUMINATED GRAPHICAL DISPLAY: The display indicates mode, detection strength and more.
  • AUDIBLE DETECTION SIGNAL: The scanner has an audible detection signal that can be turned on and off.

Description

Bosch wall scanners find magnetic and non-magnetic metals, power cables, wooden substructures or even plastic pipes with maximum reliability and precision. The scanner has an illuminated ring to indicate detection status. Green indicates no object found, orange indicates object near and red indicates object found. The scanner is equipped with an audible detection signal that can be turned on and off. The scanner is designed with an ergonomic soft-grip for comfort. Bosch’s GMS120 digital multi- scanner provides detection of multiple materials, including wood, metal, and live wiring. Because of its versatility and consistent performance, it’s an ideal tool for construction, electricians, contractors, carpenters, masons, plumbers, and others who need reliable detection. GMS120 Digital Multi-Scanner At a Glance: Three available modes: wood, metal, wiring Automatic calibration, automatic center finder Detect steel at up to 4-3/4-inches deep in concrete Illuminated display for mode, detection strength, and more Audible detection signal with an on/off button Bosch’s GMS120 digital multi-scanner has three detection modes and a bright LCD display (view larger.) Consistent Material Coverage With its three modes, Bosch’s GMS120 digital multi-scanner is an aid in most situations, as its modes cover wood studs, metal objects such as rebar, studs, and steel/copper pipes, and live wiring. It has precise automatic calibration that makes use easier and an automatic center finder, which pinpoints the center spot of the wood or material that has been detected. Deep Detection The GMS120 has a deep metal detection feature, which allows a user to detect steel that is placed up to 4-3/4-inches (120 mm) deep in cured concrete. It has a maximum detection depth of up to 2 inches for live wiring, up to 3-1/8 inches for copper, and up to 1-1/2 inches for wood studs. User-Friendly Features Bosch’s GMS120 digital multi-scanner provides an illuminated ring that indicates detection status and an audible detection signal with an on/off button. Adding to the user-focused design, its bright and readable illuminated graphical LCD display indicates mode, detection strength, and more, making it simple to check the detection device and switch modes and tasks. In addition, its ergonomic soft-grip provides a comfortable grip that’s secure and safe. Dimensions and Warranty The Bosch GMS120 digital multi-scanner measures 10-1/4 inches by 3 inches by 6-1/2 inches and weighs .6 pounds. It comes with a two-year warranty. What's in the Box One Bosch GMS120 digital multi-scanner, hand strap, one 9-volt battery, and carrying pouch. Bosch’s GMS120 digital multi-scanner detects multiple materials, has a user- friendly design, and easy detection status checking (click each to enlarge). P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); From the Manufacturer Bosch GMS 120 professional multi material cable detector, complete with protective bag. The most convenient multi-functional scanner for construction applications. Includes: hand strap, (1) 9-Volt battery and carrying case. See more

Media Type: No Media


Scanner Type: Wall


Brand: Bosch


Model Name: GMS120


Connectivity Technology: No Connectivity


Product Dimensions: 6.5"D x 10.25"W x 3"H


Resolution: 600


Item Weight: 0.5 Kilograms


Light Source Type: LED


Optical Sensor Technology: CMOS


Product Dimensions: 9.84 x 5.91 x 1.97 inches


Item Weight: 1.1 pounds


Item model number: GMS 120


Batteries: 1 9V batteries required. (included)


Is Discontinued By Manufacturer: No


Date First Available: April 5, 2011


Department: Electronics


Manufacturer: Bosch


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Jul 12 – Jul 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Escaner de pared
Style: AA Batteries
Lo probé y funciona muy bien, buen producto y llegó dentro del tiempo adecuado.
Reviewed in the United States on June 17, 2025 by Henry
    • This has many features that are helpful!
Style: AA Batteries
Best stud finder I’ve ever owned and it’s worth every penny I spent on it!
Reviewed in the United States on May 13, 2025 by siggy
    • Great birthday present for those cutting into your walls without knowing what's behind them
Style: AA Batteries
expensive, but good value, actually works as advertised, makes quick work of locating pipes, conduit, studs too
Reviewed in the United States on April 25, 2025 by J Payne
    • This easy-to-use stud/metal/wire finder is great
Style: 9V Battery
Review Image by Steve Steve
Review Image by Steve Steve
Review Image by Steve Steve
Review Image by Steve Steve
Review Image by Steve Steve
I use it for the thick drywall/plaster or wood floors in my house and works much better than the cheaper electronic ones I have used in the past. Most of my 1950s home's walls have drywall coated in plaster and are about 1" thick is most spots so non-electronic and electronic stud finders never worked too well. Remodeled areas of my home also have the standard 5/8" or 1/2" thick drywall and 3/4" thick wood paneling which I use this mostly successfully on. I also used this successfully to detect flood joists beneath wood flooring, copper and galvanized pipes behind cement board/tile and to find rebar in cement. It can detect steel as deep as 4.75" in the wall, wood up to 1.5" and wires up to 2". Using it around the house, I find it works better in the thick walls and wood paneling, especially for finding live wires. In the standard thickness drywalled walls, it does not find electrical wires well but it does find studs and plumbing well. The only downside to this detector is I cannot get it to consistently find electric wires behind 1/2" or 5/8" drywall which is standard on most homes. In most cases, it will not detect them at all but does give a reading sometimes. This is probably due to the finder only being able to detect wires up to 2" deep in the wall. Sometimes wires are not within 2" of the drywall surface. It also cannot detect studs well behind wood paneling which is not surprising. I find it pretty user-friendly, just turn it on, set your mode (wood, metal, electrical) then place it on the wall and give it a second to calibrate. Afterwards, start searching. It will alert you to whatever mode you have it set on with a bar gauge. When you have it on wood mode, it will also alert you to metal and wires which is convenient. It makes noises as you get closer (you can turn the sound off, it is a bit irritating). When you find the center of a stud, pipe or wire, the finder has a convenient holes you can stick a pencil through the mark it. It seems to find wood with the assistance of finding screws/nails and overall, I find its best to scan up and down to find the exact position of the stud, pipe or wire. You probably wont get the exact location on the first bullseye. The finder also has a backlight for the screen when using in dark areas. The finder comes with a 9v battery, carrying case and directions as well. The directions take a little reading. Overall, this is great for finding studs and pipes but 4/5 stars for the general inability to find electrical behind standard thickness drywall. 5 stars for versatility and ease of use. I thought about knocking it down a star for general failure to detect wiring but its scan range for wiring is limited as stated. ... show more
Reviewed in the United States on November 12, 2019 by Steve Steve
    • Really hoping this would have been better...
Style: 9V Battery
Gosh, I'm on the fence with this unit, and disappointed in myself that I jumped the gun before the Amazon reviews were in. If you buy this unit, by all means purchase from Amazon or another reputable retailer with a good return policy in the event you are not satisfied with its performance. I'm reserving the right to upgrade this 3-star "It's OK" review at a later date, but for now (after a couple weeks of ownership), this is where I'm calling it. I bought the GMS120 to replace a couple of older Zircon units that proved OK on drywall over fir framing, but I've moved to a more challenging climate of plaster walls, some with wire mesh. But first, on drywall, the unit has been hit or miss. I broke it in on a wall that's open on the back side (so the framing is exposed), and I'm not getting the precision I've come to expect with the center-finding Zircon unit I own (which has also been hit-or-miss). Where the Zircon projected a finely focused LED beam along the calculated stud center, this Bosch unit gives a LCD "bar graph" display plus a 1/2" wide lighted circle that changes from red to yellow to green -- so the user is responsible for tracing a circle, or drawing a crosshair inside the circle, to note this location. The indicated center of the stud is often not repeatable, so it takes a number of back-and-forth scans to get a good feel for where I should be drilling. And on the drywall over metal stud walls at work -- big disappointment; no usable readings. On plaster, I've been confounded by this unit's inability to locate a stud correctly. The instructions recommend placing paper or thin cardboard backing behind the sensor to assist with the uneven thickness / density of plaster walls, but the 1/4" lath appears to be too much to overcome. Never mind when chicken wire is in the mix. I'm going to keep playing with this and find a hopeful solution, as according to the reviews out of various European publications I've read, this shouldn't present an insurmountable challenge. Worse yet, the current sensing function seems to be entirely non-functional. I've traced over known, energized wire locations with nary a *beep* from the scanner. Another reviewer states that this current sensing function is active in the wood scanning mode (I stated contrary previously and stand corrected), but I've yet to receive an accurate current warning from this scanner, regardless of mode selection). If I recall correctly, the Zircon stud finder sensed electrical current when in stud finding mode, so where two passes are required with the Bosch, the Zircon would somewhat reliably call out a live wire while in the process of scanning for studs. This function works if I place the sensor directly on live Romex or even a power cord plugged into a wall socket, but once drywall is sandwiched in the middle, readings disappear. And the LCD display... what was Bosch thinking? There's a lot of info on the display, and it's backlit (user selectable on/off -- yay!!) but the viewing angle turns to zero if I hold the scanner just a FEW INCHES below eye level -- ZERO, as in INVISIBLE -- it appears the thing powered off. Higher than eye level, no problem, but lower -- even with the backlight on, it's completely unreadable. Seriously, Bosch? This may not sound like a big deal, but consider for a moment how you hold your arm while using one of these gizmos. I can't speak for the wider user base, but I feel most natural / comfortable with it at chest / neck height, exactly where the display goes blank. The scanner comes with a rather thorough multi-language instruction manual, which shouldn't be necessary for something so simple. Nevertheless, it's true to Bosch's tradition and appreciated. It also comes with a tight fitting canvas-style case which truly could be just a tad bigger. I'm holding out hope that I'm missing something important here and I'll grow to love this unit, based not only on Bosch's reputation, but on the stellar reviews I've read in various trade mags. Honestly, I'm not seeing this as being any better than the scanners available from Zircon, and the half-viewable LCD display is an absolute disappointment. My last stud finder purchase was 6+ years ago, and after reading some great "pro" reviews about this unit, I was fully expecting that the state of the technology had greatly advanced versus the Zircon that was already in my tool bag -- especially coming from Bosch! I'm in the process of contacting Bosch customer service to see if perhaps I have a lemon, because again, my experience has been nothing like the reviews I've read proclaiming the GMS120 to be the best in class. ... show more
Reviewed in the United States on May 26, 2011 by Nathaniel Allen

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