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Internet # 334688683

Model # FSM15502HD

Store SKU # 1013960126

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ProSensor M155 Full Width Center and Edge Stud Finder with 9-Sensors and Live Wire Meter/Wood and Metal Stud Detector

$42.97
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  • Higher accuracy, better technology with 9 patented sensors
  • Safety first live wire warning for worry-free drilling
  • Stud Finder shows the FULL WIDTH of Studs with a wide LED display
  • View More Details

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Product Details

About This Product

With a Franklin Sensors stud finder, you have the fastest, easiest, most accurate stud finder on the market. To operate the ProSensor M155, simply press and hold the button then place it on the wall and go. There is no calibration procedure. You can instantly find studs. Once you have it on the wall, the LEDs show you right where the stud is. The M155 has an Enhanced Precision LED display. With 15 tightly spaced LEDs the M155 more precisely identifies studs. When you move the unit back and forth, the ProSensor M155 continues to track the location of the stud which makes it easy to instantly see the edges and the center of the stud. Franklin Sensors stud finders are the most accurate stud detectors because they have more sensors. Other stud finders typically have only 1 or 2 sensors. The M155 has 9, making it the best wall stud finder on the market. With Franklin Sensors' patented technology, you can find stud positions with unbeatable accuracy. The wide display on the M155 allows you to see the full width of objects such as single studs and double studs. The M155 also identifies live wires for extra safety. The ProSensor M155 is the perfect wall scanner for many projects ranging from hanging pictures to installing cabinets and flat screen TVs. Once you try the ProSensor M155, Franklin Sensors stud finders will quickly become your favorite.

Highlights

  • ACCURATE: More Sensors = More Accuracy. Conventional stud finders have 1 or 2 sensors. The ProSensor M155 has 9, making it one of the best wall stud finders on the market
  • SAFETY FIRST LIVE WIRE METER: The ProSensor M155 includes a live wire meter for worry-free drilling
  • DETECTS WOOD AND METAL STUDS: The ProSensor M155 stud detector identifies any change in density-wood or metal-no extra buttons required
  • SHOWS FULL WIDTH OF STUDS: The LEDs track stud center and edges, showing single studs, double studs and irregular configurations other stud finders cannot detect. Upgrade from your center finder to a comprehensive visual of what's behind your walls
  • 1.5 IN. DEEP SCAN ALWAYS ON: One mode finds it all! The ProSensor M155 adjusts for a variety of depths, materials and textures, including sheetrock/drywall and more
  • EASY: No calibration required. Simply press and hold the button to begin scanning. Unlike other stud finders that give false readings, the ProSensor M155 lets you start scanning anywhere, even over a stud
  • DURABLE: #1 rated by consumers and pros, the ProSensor M155 stud detector is both accurate and durable
  • MADE IN THE USA: all Franklin Sensors stud finders are made in the USA, and we stand by our products with a limited lifetime warranty
  • ADDITIONAL INFO: requires 2 AAA alkaline batteries (not included)
  • Click here for more information on Electronic Recycling Programs
  • Return Policy
  • California residents
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Product Information

Internet # 334688683

Model # FSM15502HD

Store SKU # 1013960126

Additional Resources

Shop All Franklin Sensors
From the Manufacturer

Specifications

Product Width (in.): 5.52 in

Dimensions

Product Width (in.)

5.52 in

Details

Features

Electronic, Hand-Held, LED Display

Hand Tool Type

Stud Sensor

Remote Access

No Remote Access

Requires Hub?

No Hub Required

Returnable

90-Day

Tools Product Type

Hand Tool

Warranty / Certifications

Manufacturer Warranty

Lifetime

Questions & Answers

What kind of battery does it take
ByAug 9, 2026
0 Answer | 
Answer This Question

What is the difference between the M155 and the M150?
ByFeb 11, 2026
1 Answer | 
Answer This Question

The main difference is the live wire detection! The M150 has lighting bolts that illuminate when Live AC has been detected while the M155 live wire meter learns the live AC and can even tell which side of the stud its on!

By|Aug 7, 2026

    (7)

    Will it work over a wood paneling wall
    ByDec 13, 2025
    1 Answer | 
    Answer This Question

    Yes! The M155 will work over wood paneling to find wood/metal studs!

    By|Apr 26, 2026

      (2)

      Can this read though plaster walls?
      ByNov 9, 2025
      1 Answer | 
      Answer This Question

      We can not guarantee the M155 will work through plaster as it can be applied extremely thick. I would recommend the MAX stud finder as it has a detection depth of 2.5" inches!

      By|Apr 6, 2026

        (1)

        Will this find studs through a tile shower wall
        ByNov 4, 2025
        1 Answer | 
        Answer This Question

        The M155 will not work through tile. We recommend the MAX as it is designed for tougher materials like tile, OSB, plywood, etc.

        By|Apr 6, 2026

          (1)

          What type of batteries does it use?
          ByOct 28, 2025
          1 Answer | 
          Answer This Question

          The M155 uses 2 AAA alkaline batteries!

          By|Apr 6, 2026

            (1)

            Viewing 1-6 of 6

            Customer Reviews

            4.8 out of 5

            • 4.8 out of 2,212 reviews
            • 2% recommend this product
            Filter by:
            Showing 1-10 of 2,212 reviews
            This was the first stud finder I owned with the live wire meter, and it works great. Much better than the other ones I always used before but always chance it not knowing if they were live wires behind the wall. I feel much more confident with this. I actually like it so much I bought my landlord one for Christmas.
            by
            1 found this review helpful
            GS150
            I don’t know how to find if it needs a battery lol
            by
              Great tool
              Very accurate and easy to work with.
              by
                Too New To Tell
                I like the features, but I’m not sure exactly how it’s going to work. Once I use it a few times I will hopefully update my review.
                by
                  Good
                  Good
                  by
                    Amazing product
                    This is a great product. I would recommend this to everyone at all ages knowing If there is live power behind the wall that you are screwing into could be the difference between being electrocuted or not. Plus being on the center of the stud is important when hanging anything valuable up or heavy up to ensure its secured to the wall
                    by
                      So far great product
                      I haven’t tried it out yet, but I did use it against One. It looks awesome and I heard great reviews.
                      by
                        Believed that work great
                        Looks good I'm not using out yet
                        by
                          Five star
                          Awesome
                          by
                            M150
                            Great advice for my business and easy to use. Love it.
                            by
                              Showing 1-10 of 2,212 reviews

                              Compare Key Features

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                              Product Snapshot

                              Ideal for homeowners looking for accurate stud finding, making hanging projects easier and more efficient.
                              Ideal for homeowners looking for accurate stud finding , making installation projects easier . The ProSensor 710+ boasts 13 sensors for superior accuracy and detects both wood and metal studs without extra buttons ..
                              Ideal for homeowners looking for accurate stud finding, making hanging projects easier with its 13 sensors and live wire detection.

                              Detection Depth

                              1.5 in.
                              1.7 in.
                              1.7 in.

                              Material Detection

                              Display Type

                              LED
                              LED
                              LED

                              Edge and Center Finding

                              Multiple Scan Modes