Model # MMD900

Internet #203079381

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

General Tools

Dual Pin/Pinless Moisture Meter with 2 in. D

$153.91 /each

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Product Overview

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.

California residents: see   Proposition 65 information

  • 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

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

Any store on stock

Asked by: Jleon
Hi Jleon, this 'Dual Pin/Pinless Moisture Meter with 2 in. D' is an online exclusive item and comes directly from the inventory where it can be shipped to you directly or if it is eligible, shipped to a Home Depot store. Thank you for shopping Home Depot!
Answered by: THDSupport
Date published: 2016-11-24

what is the moisture range % of this product?

what is the moisture range % eg 6 to 30% what are the pin lengths? will the pin method and the surface method produce the same reading. surface method says it goes down 2 inches... how far does the pin method read? thanks
Asked by: Joe
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Customer Reviews

Dual Pin/Pinless Moisture Meter with 2 in. D is rated 4.5 out of 5 by 2.
Rated 5 out of 5 by from Great product and priced right Great price, Great product. Quick delivery. seamless purchasing online. Thanks Home Depot!!
Date published: 2015-06-16
Rated 4 out of 5 by from Easy To Use Seems straight forward. Does what is needed and is simple to understand.
Date published: 2013-08-09
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