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Internet # 100651808

Model # MMD4E

Store SKU # 1002771776

Store SO SKU #1000736083

Pin-Type Digital Moisture Meter with LCD Display

$37.70
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  • 3% accuracy and 0.1% resolution
  • LCD display with low-battery indicator
  • Great for home inspections, renovations, roof leaks and more
  • View More Details

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Product Details

About This Product

The General Tools Pin-Type Digital Moisture Meter with LCD Display offers accurate moisture-level readings for wood, plaster and drywall. Use the moisture meter during a home inspection, when you pick up lumber or before painting drywall. This meter has a jumbo LCD display with a low-battery indicator.

Highlights

  • Measures water content of wood and building materials with 3% accuracy and 0.1% resolution
  • Helpful for new home inspections and home restorations, locating roof leaks or selecting dry lumber at the yard
  • Helps ensure appropriate levels of surface dryness before painting, sealing or treating wood or drywall
  • Overall measurement range of 5 to 50% for wood and 1.5 to 33% for building materials
  • Separate low, medium and high scales, icons and tones for wood and building materials
  • Built-in low battery indicator for energy conservation
  • LCD display with hold button to freeze/hold reading
  • Pin length: 0.3 in. (8 mm)
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 100651808

Model # MMD4E

Store SKU # 1002771776

Store SO SKU #1000736083

Specifications

Details

Features

Audible Alert, Backlit, Data Logging

Included

Batteries, Extra Pins/Probes

Probe Type

Pin

Returnable

90-Day

Warranty / Certifications

Manufacturer Warranty

1 Year

Questions & Answers

Is it possible to turn off the audible alert?
ByJun 30, 2026
1 Answer | 
Answer This Question

Hello, thank you for reaching out. There is no way to turn off the audible alert on this meter.

By|Jul 2, 2026


    Is it accurate to measure moisture in cinder block basement wall?
    ByJun 25, 2026
    1 Answer | 
    Answer This Question

    Our moisture meters are not capable of reading accurately in cinder black due to the increased conductivity in concrete. This is similar to the reaction you will see when scanning metal; these units are reacting to the conductivity in the material, and not to any moisture, making the readings untrustworthy.

    By|Jun 30, 2026


      Checking moisture in my home under the sink as it has particle board and cabinets and wsll spaces is this adequate?
      ByMar 2, 2026
      1 Answer | 
      Answer This Question

      Yes — the Pin-Type Digital Moisture Meter with LCD Display is adequate for checking moisture under your sink, including particle board, cabinets, and wall spaces.

      By|Mar 2, 2026


        How do you use this to test for moisture in wood
        ByFeb 23, 2026
        1 Answer | 
        Answer This Question

        To measure wood, press and hold the power button, press "Mode" to select "Wood", remove the cover on the end to expose the pins, press the pins into the wood either on the end of a split piece of wood or on its side. The inside of a freshly split piece is the best place to measure to get the overall moisture content, but the end is ok to get a quick general idea. The display will indicate the moisture content, and a light will indicate whether that is "Low", "Mid", or "High". You can also measure the calibrated resistor inside the cap to assure that it is measuring correctly. An extra set of pins are included in case the test pins are damaged.

        By|Feb 27, 2026


          Is this suitable for measuring moisture content of textiles
          ByFeb 13, 2026
          1 Answer | 
          Answer This Question

          The MM7 is designed for use in woodworking, water damage restoration, building construction and home renovation.

          By|Feb 17, 2026


            Did this moisture meter supersede the model MM7?
            ByJan 15, 2026
            0 Answer | 
            Answer This Question

            Do I understand from the description that this item offers up to 3% accuracy? Does that mean it is wrong 97% of the time?
            ByOct 25, 2025
            1 Answer | 
            Answer This Question

            The 3% accuracy means that if a reading is showing up as 10%, the moisture content could be anywhere from 7-13%. These meters do have a calibration check as a feature that can be used to see the exact skew of the sensor.

            By|Nov 24, 2025


              I would like to know if this device can measure moisture and find mold
              ByOct 8, 2025
              0 Answer | 
              Answer This Question

              Viewing 1-8 of 60

              Customer Reviews

              4.4 out of 5

              • 4.4 out of 183 reviews
              • 93% recommend this product
              Filter by:
              Showing 1-10 of 183 reviews
              Measures moisture ok, but "Hold" does not work
              The meter seems to read accurately, but the "Hold" button does not work. For the price I'm not impressed, but unfortunately, you have to spend a lot more to get a quality meter. Considering the meter has only one, relatively simple function, we should expect better quality at this price point.
              by
              Response from General ToolsDec 30, 2025
              We are very sorry that you are not completely satisfied with your purchase. We appreciate the time you took to write this review. We would like to assist you with your issue. Please call 800-697-8665 Ext 6 or email us at techsupport@generaltools.com. We will be more than happy to resolve this issue for you.
                Easy to use and read percentage of moisture. comes with a set of replacement probes.
                by
                • Verified Purchase
                This moisture monitor did a good job measuring water content in wood.
                by
                This customer chose to rate the product and not provide text.
                by
                • Verified Purchase
                This customer chose to rate the product and not provide text.
                by
                the moisture tester work fine for what I needed
                by
                Response from General ToolsDec 12, 2025
                We appreciate the positive feedback you kindly submitted on your General Tools purchase. For nearly a century, General Tools has been a recognized leader in the design and development of precision specialized tools. We pride ourselves on delivering the PRECISE tool for the job. Thanks again for your product review. We are pleased that you are satisfied with your General Tools purchase!
                This customer chose to rate the product and not provide text.
                by
                • Verified Purchase
                The unit works, simple, and easy to use.
                by
                Response from General ToolsNov 24, 2025
                We appreciate the positive feedback you kindly submitted on your General Tools purchase. For nearly a century, General Tools has been a recognized leader in the design and development of precision specialized tools. We pride ourselves on delivering the PRECISE tool for the job. Thanks again for your product review. We are pleased that you are satisfied with your General Tools purchase!
                • Verified Purchase
                meter works as advertised
                by
                Response from General ToolsNov 24, 2025
                We appreciate the positive feedback you kindly submitted on your General Tools purchase. For nearly a century, General Tools has been a recognized leader in the design and development of precision specialized tools. We pride ourselves on delivering the PRECISE tool for the job. Thanks again for your product review. We are pleased that you are satisfied with your General Tools purchase!
                Great user friendly tool for determining moisture level of wood before painting, staining, or building. I have used it to ensure pressure treated lumber has cured and shrunken to final size before installing. I have seen fence planks shrink 3/8" in width, and lumber shrink 1/2" in length, so knowing when the wood has dried to normal is critical. You should not attempt wood flooring without a moisture measurement. Information is power.
                by
                Response from General ToolsAug 5, 2025
                We appreciate the positive feedback you kindly submitted on your General Tools purchase. For nearly a century, General Tools has been a recognized leader in the design and development of precision specialized tools. We pride ourselves on delivering the PRECISE tool for the job. Thanks again for your product review. We are pleased that you are satisfied with your General Tools purchase!
                1 found this review helpful
                Showing 1-10 of 183 reviews

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                Product Snapshot

                Ideal for homeowners and contractors accurately measuring moisture in wood and building materials for inspections, restorations, and pre-treatment assessments.
                Ideal for home inspectors, this mini moisture meter offers accurate readings for wood and building materials with audible alerts.
                Suitable for both professionals and home users seeking precise moisture detection in wood and drywall.
                Suitable for both professionals and DIYers seeking accurate pin and pinless moisture detection.

                Pinless measurement capability

                Multiple material settings

                Data logging

                Deep penetration capability

                Backlit display