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Internet # 337061683

Model # MM19

Store SKU # 1014493368

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2-in-1 Pin and Pinless Moisture Meter with Backlit Display for Wood, Drywall, and Building Materials

$59.97
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  • 2-in-1 pin and pinless moisture detection
  • Measures material moisture plus room temperature and humidity
  • Replacement pins stored inside the handle
  • View More Details

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Product Details

About This Product

The General Tools 2-in-1 Moisture Meter combines the accuracy of pin-based readings with the convenience of pinless scanning. Pin mode provides direct moisture readings from inside materials like wood or drywall, while pinless mode allows you to scan large areas without damaging the surface. This versatile tool is perfect for home inspections, renovations, and material prep. It also displays ambient temperature and humidity, so you can assess environmental conditions at a glance. A backlit screen improves visibility in dark or hard-to-reach areas, and replacement pins are included and stored in the handle for convenience.

Highlights

  • Pin mode delivers precise moisture readings for targeted testing
  • Pinless mode scans surfaces without leaving marks or holes
  • Ideal for wood, drywall, and other common building materials
  • Backlit display shows moisture, temperature, and humidity levels clearly
  • Replacement pins are included and stored in the handle for quick access
  • Durable and easy to operate for both diyers and professionals
  • Click here for more information on Electronic Recycling Programs
  • Return Policy
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Product Information

Internet # 337061683

Model # MM19

Store SKU # 1014493368

Specifications

Details

Features

Auto Shutoff, Low Battery Indicator

Included

Batteries

Material Compatibility

Drywall, Wood

Power Source

Battery Operated

Probe Type

Pin, Pinless

Returnable

90-Day

Warranty / Certifications

Manufacturer Warranty

1-Year

Questions & Answers

Pinlessand Drywall moes. I have sheetrock over metal studs. Whenever I test at the edge of a wall endcap it reads full red <54% humidity. Tested in multiple rooms multiple endcap. 2 inches in from the endcap readings are normal.
ByJul 28, 2026
0 Answer | 
Answer This Question

Can it be used as a taser if the plumber’s fault has been verified?
ByJul 10, 2026
0 Answer | 
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does it come with a case
ByJul 5, 2026
1 Answer | 
Answer This Question

Hello, thank you for your question, the moisture meter does not come with a case.

By|Jul 29, 2026

    (1)

    Does this work on concrete pavers 2" thick.
    ByJun 18, 2026
    1 Answer | 
    Answer This Question

    Hello, thank you for your question. Our moisture meter does not work on concrete. This is because the way the reading is taken is through a small electrical current, the concrete is unable to conduct that current.

    By|Aug 16, 2026

      (3)

      to what depth does it perceive moisture? If my wood flooring has a plastic/rubber/etc layer on the bottom, does this tool detect moisture under the "rubber" (or whatever the black cover is on the bottom of my wood flooring)?
      ByMay 30, 2026
      1 Answer | 
      Answer This Question

      Hello, thank you for reaching out. The moisture reading goes only as deep as the pins go, the reading is take through the resistance of an electrical current between the two pins.

      By|Aug 12, 2026

        (2)

        Does the pinless feature read through porcelain tile?
        ByMay 23, 2026
        1 Answer | 
        Answer This Question

        Hello, thanks for reaching out. Our pinless feature is not designed for porcelain tile.

        By|May 28, 2026


          What is the maximum depth measurement for drywalls?
          ByApr 12, 2026
          1 Answer | 
          Answer This Question

          The maximum depth measurement for drywalls equates to the length of the pins which is about 9mm.

          By|Apr 14, 2026


            Can I use this on plaster walls with terra cotta bricks?
            ByMar 22, 2026
            1 Answer | 
            Answer This Question

            Hey, thanks for reaching out! Yes, the MM19 will work on plaster walls, but the terra cotta bricks may give a false reading.

            By|Mar 24, 2026


              Viewing 1-8 of 12

              Customer Reviews

              4.5 out of 5

              • 4.5 out of 145 reviews
              • 80% recommend this product
              Filter by:
              Showing 1-10 of 145 reviews
              Pin Reading Inaccurate
              The painless mode only shows a reading of (HI) no percentages of moisture in the material you’re testing. There is a colored bar to the left that indicate Green, Yellow, Red and that seems relatively accurate. The problem the pins. They are very inaccurate. First checked calibration per the manufacturer and it was within specifications. Then I tested it by pressed the pins into a piece of saturated wood; it only read 14.9% (btw moisture % readings are only shown when in pin mode). I tested it again by pressing the pins into a water soaked paper towel on top of the saturated wood 14.8% Not acceptable for home inspection in my opinion.
              by
              Response from General ToolsJun 23, 2026
              Hello, thank you for the feedback. If you would like additional support on this you can reach out to s via your website we would love to see what might be going on with this meter.
                Easy to use, reliable
                I have problem plumbing in the ceiling above my basement bathroom, and last night I discovered another pinhole leak that must have been going for a while, given how much water was pooling in (and dripping from) the ceiling. After repairing the pipe and drying out the area for hours, I decided to check out how well the drying process was going with this moisture meter. I was able to confirm what I suspected about the ceiling panel (still quite wet) with both the pinned and pin-less modes, and then checked the joists to make sure it was drying out nicely (it was). While the pin-less mode doesn’t give an exact reading, I found that the low-medium-high readout was in line with what the pins were telling me. Overall, the meter is very easy to use and gives a good piece of mind (or diagnostics) when dealing with moisture issues. The reliability of the pin-less mode means you don’t need to puncture finished surfaces to find leaks, which is also a nice feature.
                by
                • Recommended
                Find a Leak Without Cutting the Wall
                I was suspicious of a possible leak behind the wall at a relative’s house. With this meter I was able to pinpoint the area of drywall with the highest moisture. As much would have it, I cut the wall and found a pinhole in the copper pipe in their bathroom. This meter saved me a lot of frustration and drywall work. You can also use this meter on softwood, hardwood, and cement board. A must have for leak detection.
                by
                • Recommended
                Easy to use
                [This review was collected as part of a promotion.] This moisture meter is a solid, easy to use tool that delivers quick and reliable readings. I love that it offers both pin and pinless modes-great for getting precise measurements when needed or scanning surfaces without causing damage. The display is clear and easy to read, and the hold function makes it simple to capture readings in tonight or awkward spots.
                by
                  Easy to use
                  [This review was collected as part of a promotion.] This product was easy to use. There are 4 functions based on your material type you’re evaluating. I used it on the pinless setting to avoid any damage to finished surfaces. The diagnostic level was easy to read - some areas in my home were in the clear, but others beeped as it found some high moisture content. Overall, I wish it was rechargeable instead of using batteries.
                  by
                    Good unit
                    [This review was collected as part of a promotion.] I’ve been using the General Tools 2-in-1 Moisture Meter for a variety of home projects, and it’s been surprisingly reliable. What I like most is the dual functionality—being able to switch between pinless mode for quick scans and pin mode for more accurate readings is incredibly useful. The pinless sensor is great for checking large wall or floor areas without leaving marks, while the pin probes come in handy when I need precise moisture content in wood. The digital display is clear and easy to read, even in low light, and the color bar indicator makes results easy to understand at a glance. It feels solid in hand, not flimsy, and the ergonomic grip makes extended use comfortable. Overall, it’s a practical tool for homeowners, DIYers, or woodworkers who want dependable moisture detection without overcomplicating things.
                    by
                      Smooth and functional
                      [This review was collected as part of a promotion.] I conducted a site inspection to determine the leak source and was able to pinpoint it immediately using this device. Its operation was efficient and reliable, with smooth functionality and precise measurement output. The unit powered on quickly, enabling rapid deployment.
                      by
                        Easy to use
                        [This review was collected as part of a promotion.] I’ve been really happy with the General Tools 2 in 1 moisture meter. It’s very easy to use and gives quick, accurate readings. It’s been super helpful for checking moisture in wood and around the house, especially when trying to prevent potential water damage. It feels well made and reliable, and it’s a great tool to have on hand for both small projects and peace of mind.
                        by
                          Durable and accurate
                          [This review was collected as part of a promotion.] There are different modes you can select depending on what surface you are testing moisture. Its feels nice in the hand and is easy to use. Readings are so far accurate. This will def come in handy.
                          by
                            This 2-in-1 moisture meter has been incredibly hel
                            [This review was collected as part of a promotion.] This 2-in-1 moisture meter has been incredibly helpful and easy to use. It provides quick, accurate readings and takes the guesswork out of checking moisture levels, whether for home projects, inspections, or routine maintenance. The dual functionality makes it a great value, and the display is clear and easy to read. I appreciate how lightweight and portable it is, making it convenient to use in multiple areas without hassle. It’s especially useful for identifying potential problem areas early and preventing costly issues down the line. Overall, this is a reliable, practical tool that does exactly what it’s supposed to do. Highly recommend for homeowners, DIYers, and professionals looking for a simple and effective moisture-checking solution.
                            by
                              Showing 1-10 of 145 reviews