Model # 2291-21

Internet #203493220

Store SO SKU #1000644141

Milwaukee M12 12-Volt Lithium-Ion Cordless Sub Scanner Detection Tool Kit

Discontinued Milwaukee

M12 12-Volt Lithium-Ion Cordless Sub Scanner Detection Tool Kit

  • Heavy duty grip detection tool
  • Four wheel design for durability and smooth, accurate measurement
  • Part of the M12 System, featuring over 70 tools

Frequently Bought Together

Product Overview

The MIlwaukee 2291-21 M12 Lithium-ion Sub Scanner Detection Tool is a heavy duty pistol grip detection tool for professional commercial and industrial applications. Powered by the Milwaukee M12 Red Lithium battery, the 2291-21 can detect rebar up to 6 in. deep in concrete, as well as the location of wood and metal studs beneath drywall. In addition, the M12 Lithium-ion Sub Scanner Detection Tool has a four wheel design for durability and smooth, accurate measurement. The 2291-21 is covered by the Milwaukee 5-year warranty.

  • Measures depth and location of rebar up to 6 in. through concrete
  • Detects location of wood and metal studs
  • Differentiates between steel (ferrous) and copper or aluminum (non-ferrous) metals
  • Intuitive user interface displays stud centers and edges
  • High contrast white on black display and backlight for easy reading
  • Rugged over-molding improves durability and user grip
  • One button calibration for all surfaces
  • Compatible batteries: compact (48-11-2401), extra capacity (48-11-2402)
  • Compatible chargers: M12/M18 multivoltage (48-59-1812), M12 AC/DC (2510-20), M12 30 min. (48-59-2401)
  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

Can this detect studs under stucco?

Example: I have looked at the manual and can't figure out what I did wrong.
Asked by: Shz
Stucco walls can affect the scanners readings.
Answered by: CommunityAnswer
Date published: 2016-06-06

Can this detect electrical romex style wiring through drywall and wood products?

Asked by: chris
No. This tool is capable of detecting wood studs, metal studs and ferrous and non-ferrous pipe. Electrical wiring is too small for this tool to detect.
Answered by: MilwaukeeElectric
Date published: 2016-04-27

This model detects pvc???

Asked by: Henry
Yes. This tool can detect PVC in 1 ½” or material on stud mode.
Answered by: MilwaukeeElectric
Date published: 2016-04-27

Can this detect the studs under the asphalt shingles on my roof?

I need to find the studs under the shingles to bolt rails to attach solar panels. I want to know if this will find the studs.
Asked by: Luth
Yes. This unit can scan for studs in material up to 1-1/2" thick.
Answered by: MilwaukeeElectric
Date published: 2016-04-27
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Customer Reviews

M12 12-Volt Lithium-Ion Cordless Sub Scanner Detection Tool Kit is rated 4.0 out of 5 by 5.
Rated 5 out of 5 by from Amazing Tool!! I have this tool for 2 months and I can say it was an amazing surprise. It really delivers what it proposes. The battery lasts much, just made the first charge and still have 2/3 load! Detects iron, copper, aluminum, wood, electrical wires and pipes with water (PVC up!). The mode is the most incredible METAL, including detecting the center of the rebar. Your competitor also does this, but the Milwaukee you pay 1/3 of the value in Brazil. Excellent sensitivity and knowing use, gives even to draw a diagram of pipes in the wall. Details: Does not save the setting and sound units and difficulty in detecting surface marble (so what?? Your competitor too!!). Great cost-benefit. Milwaukee, please come to Brazil soon!
Date published: 2013-01-06
Rated 5 out of 5 by from Nice unit! I have owned this tool for a couple years now and have always been happy with the results when I use it. Yes, this tool does have some size to it as compared to the typical home use stud finder but it is much more than just a stud finder. As for as its weight, when you pick it up without the battery, you might think there is nothing inside the case. It's not really heavy at all! I think Milwaukee did a good job with this tool. I don't believe that Harry Homeowner was the target market when it was designed.
Date published: 2012-08-12
Rated 4 out of 5 by from The one I kept...I think? I have a drawer full of these devices, ranging from $15.00 - $40.00. I am a third generation Architectural wood worker /consultant. I am the first generation to have a device bigger than a magnet to locate studs in a wall. In the quest to get a stud finder that is accurate, I have recently ordered the blue competitors $1000.00 radar model, its blue $79.00 model, as well as this $250 radar model (much like the $1000.00 one). I have returned all of them except this radar model because it gave the best results. I have come to the conclusion that with all the variables one will run up against, nothing is going to give the results I require that I can’t accomplish by measure tape, nail and wall patch. This is what I experienced after trying on several different areas. Studs would appear, and then disappear, leaving doubt. But with this one, after learning a few things about how this unit uniquely calibrates I got some fair results. At least much better than any other manufactures devices. There is no electrical detect which I don’t know could it wasn’t added. I also pick this one because I have a high end woodshop and I need to scan for metallic objects prior to machining. This rates excellent for this and saves a ton of time and money preventing damage to cutterheads. For my needs I’m keeping this one. I do like the fact it uses the M12 battery system which is compatible with several other tools we have. The battery life is way excellent as well. The display is easy read and navigating the controls is easy for this old man (meaning I don’t need to get my 6 year old grandson to operate it for me).
Date published: 2013-10-31
Rated 5 out of 5 by from Light and Efficient The tool may resemble a small Geiger meter but its light easy to operate. I'm glad I made the investment. I'd love to see a combination pin and pinless moisture meter like this.
Date published: 2016-07-30
Rated 1 out of 5 by from MAJOR DESIGN FLAW!!! I love Milwaukee but handle style scanners like this and Dewalt have a major design flaw; THEY ASSUME THE STUDS ARE PLUMB!!! They are not. The stud sensor is located under the handle, but you have to make the mark at the top, about 6" up. Thus, let's say your stud has a 45 degree tilt to the right and you make your mark 6" up, you will completely miss the stud if you drill at the mark. The center is 6" south and maybe 3" to the left. The metal sensor is located about 1" below the top marker. It's less of an issue since it is closer to the marker, but it can still be off. I spent over 3 hours trying to find why I could never find the same center to finally discover this problem. Urr... horrible, just horrible for $250 + tax. If I knew this beforehand, I might not even pay $30 for it.
Date published: 2016-01-18
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