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General Tools MMD4E Pin‑Type LCD Moisture Meter

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  • 5 to 50% WME
  • Pin length: 8mm
  • Large, bright LCD screen
  • Audible tones for low, medium, and high moisture levels
  • 9V battery included

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Product Information

Fast, Accurate Moisture Measurement in Wood and Other Building Materials

The MMD4E is a pin-type moisture meter that takes fast and accurate measurements in a variety of wood and building materials. This meter is ideal for use in woodworking, building construction, home inspection, lumber selection, and water damage restoration.


Readings are displayed on a large, brightly lit LCD screen, so you'll never have to squint or second guess your readings. The MMD4E emits low, medium, and high moisture tones plus on-screen icons to alert the user when certain moisture levels are detected.


A convenient HOLD function allows you to take moisture readings in areas where the screen may not be readily visible, such as behind obstacles or within wall cavities. 


The pin cap protects the pins from damage and doubles as a calibration checker, ensuring your moisture meter is always protected and accurate.


After 3 minutes of inactivity, this meter automatically powers off to preserve battery life. 


The MMD4E comes with a 9V battery and a 1-year limited warranty. Replacement #PIN3 pins sold separately.



  • Measurement ranges: 5 to 50%WME (Wood Moisture Equivalent) for wood, 1.5 to 33% for building materials
  • Moisture measurement accuracy/resolution: ±2%/0.1%
  • Pin length: 0.3 in. (8mm)
  • Wood moisture scales: 5 to 11.9% (low); 12 to 15.9% (medium); 16 to 50% (high)
  • Building materials scales: 1.5 to 16.9% (low); 17 to 19.9% (medium); 20 to 33% (high)
  • Display size and type: 99.9 count backlit LCD with 0.3 in (8mm) high digits
  • Auto power off: After 3 minutes of inactivity
  • Weight: 3 oz (86g)
  • Power source: "9V" battery (included)
  • 6.0 x 2.6 x 0.8 in. (152 x 66 x 20 mm)


More Information
Prop 65 Text This product can expose you to chemicals including di2-ethylhexylphthalate (DEHP) which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to
Brand General Tools
Category Moisture Meters
Warranty Information 1-year limited warranty
Condition New
Manufacturer Model Number MMD4E
Pin Mode Wood Scale Range 5% to 60% Moisture Content
Manual / Schematic
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