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General Pin Type Digital Moisture Meter (MMD3E) Audible Alert

Model #: MMD3E
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Category Moisture Detectors

General Tools Pin-Type Digital Moisture Meter with Audible Alert and 3 Ranges.

Great pocket size tool for measuring the moisture content of wood and building materials; detecting moisture below carpeting and sub-flooring; selecting dry lumber.


  • Includes separate moisture-resistance curves for wood and building materials.
  • 99.9 count green backlit LCD w/0.3 in. high digits
  • Data hold button
  • Hold icon (illuminates while a reading is being held)
  • Replaceable stainless steel probes
  • Low battery indicator
  • Battery test button
  • Measures: Wood, drywall, cement, paper, wallpaper
  • Pocket sized, lightweight unit
  • 3-minute Auto Power Off
  • Snap-on protective cap doubles as calibration checker.
  • The instrument measuring pins are small and sharp which means measurements can be taken at the surface with virtually no mark left behind


  • Measurement range: 5 to 50% for wood; 1.5 to 33% for building materials
  • Resolution: 0.1%
  • Accuracy: within 98% of reading
  • Operating Temperature: 32 F to 122 F
    NOTE most batteries are not rated for below -4 F or above 125 F
  • Operating Humidity: less than 90% RH
  • Dimensions 5.7 x 2.4 x 1.1 inches (145 x 62 x 27mm)
  • Power: (1) 9v alkaline or equivalent

Supplied With:

  • Protective cap
  • Instruction manual
  • Two replacement 9mm (0.35 in.) long test pins - General Part No. PIN3DE
  • 1 year limited manufacturer's warranty

  • When the icon appears at the upper left of the LCD, its time to replace the 9V battery that powers the 8 instrument (although measurements will remain valid for several hours after the icon first appears). To replace the battery, follow the instructions on page 4 of the instruction manual.
  • Do not operate the MMD3E in the presence of flammable or explosive gases.
  • Be careful not to stab yourself with the extremely sharp test pins.
  • Replace the pin cap and black rubber protection sleeves after making measurements for safety reasons and to avoid bending or dulling the pins.
  • After subjecting the meter to a large change in ambient temperature, wait at least 30 minutes before making measurements to guarantee the accuracy of readings.
  • Remove the battery when storing the unit or when you do not expect to use it for an extended period of time (months rather than weeks).
UPC: 681035016053
Search Category: Hardware > Tools
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Category Moisture Detectors
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