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    General Tools   Dual Pin/Pinless Moisture Meter with 2 in. D

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    • Description

      General Tools has grown to become the recognized industry leader for specialty hand tools and instruments. The MMD900 is designed for use in woodworking, water damage restoration, building construction and home renovation. The meter senses the moisture level of a material using either of 2 techniques: (1) inferring the material electrical conductivity from the current flow induced between a pair of steel pins placed on or into the material. The wetter a material, the higher its conductivity. The MMD900 is equipped with 2 pairs of test pin 1 pair on the top of the instrument and the other at the end of a cable and remote probe that can fit in tighter spaces. (2) Measuring the change in the material’s capacitance produced by the slight spreading of a local electric field generated by the meter. When the meter is powered on, 2 plates inside the back of the MMD900’s housing are charged with opposite polarity and pulsed at a high frequency. This causes current to flow, creating a 3-dimensional electromagnetic wave at radio frequency that extends about 2 in. (50 mm) perpendicular to the meter. When the back of the meter is placed against a wet material, the increased capacitance of the material distorts the wave’s electric field to an extent that can be measured. The distortion called the fringing field effect is proportional to the material’s moisture level.

      • Features 2 measurement modes: pin (conductivity-based) and pin less (based on the fringing field effect)
      • Includes 2 sets of test pins: on top of the meter and at the end of 46 in. remote cable
      • Pin measurement accuracy of ±3%
      • Pin less mode measurement depth of 2 in. below surface
      • Displays %WME and relative readings simultaneously on 2 displays: 0 to 99.9 count jumbo LCD with 0.9 in. (23 mm) digits and 40-dot tri-color LED bar graph
      • Manual or automatic calibration checking
      • Data hold (display lock) function
      • User-programmable beeper function, backlight function and auto power off time
      • Low battery warning
      • Includes 2 pairs of replacement test pins
      • Spare pins storage compartment
      • MMD950 comes in a custom molded plastic case along with a remote pin-type probe and cable, a 9-Volt battery, 2 pairs of replacement pins and a product manual
    • Specifications
      Electrical Product Type :
      Electrical Tool Accessory
      Product Depth (in.) :
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    • Reviews

      Ratings & Reviews

      100% of customers recommend this product
      Out of 5:
      • Easy To Use
      • August 09, 2013
      • Verified Purchase & Recommended Product

      Seems straight forward. Does what is needed and is simple to understand.

      Pros Easy to Use, Clear Instructions


      more details...
      By: MattRo1
    • Shipping & Delivery Options

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      Arrival dates and shipping costs shown above are estimates.See exact dates and costs and select your preferred shipping option during checkout.


      Express Delivery from Store is available for items currently in stock at a The Home Depot store within a delivery ZIP code. A driver from a local store will deliver the item(s).

      Outside Delivery:  Service includes delivery to area outside the house which is accessible by delivery equipment.

      Threshold Delivery: Service includes delivery across your first doorway or threshold (ie. garage, backyard, deck, first room of the home).

    This item cannot be shipped to the following state(s): AK,GU,HI,PR,VI