Model # MM1E

Internet #100651810

General Tools Pin-Type Moisture Meter with LED Bar Graph Display

General Tools

Pin-Type Moisture Meter with LED Bar Graph Display

  • Great for identifying leaks in roofs, floors and walls
  • Reads moisture content over 2 separate ranges
  • 10-LED bar graph provides accuracy to within +/- 1%
$2295 /each
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Frequently Bought Together

Product Overview

The General Tools Pin-Type Moisture Meter with LED Bar Graph Display is perfect for detecting the water content in a variety of materials to help ensure the appropriate level of surface dryness before painting, sealing or treating. Ten LED lights in green, yellow and red clearly indicate moisture contents ranging from 7% to 35% to help ensure precise readings every time. Whether you're a professional contractor or a conscientious homeowner, this ultra-sensitive moisture meter helps you easily detect hidden leaks in wood, plaster and carpet. This analog meter provides accurate moisture-level readings and is great for new home inspections, locating roof leaks or even selecting dry lumber at the yard.

California residents: see   Proposition 65 information

  • Use to detect water content in wood, plaster, drywall and carpet materials to help ensure appropriate levels of surface dryness before painting, sealing or treating
  • Use in the restoration business to check if there is moisture in carpets and subflooring
  • Locates and helps identify water leaks in roofs, floors and walls
  • Reads moisture content over two separate ranges (7% to 15% and 16% to 35%) for a variety of applications
  • Protective cap doubles as calibration checker
  • Equipped with replaceable 3/8 in. long stainless steel pins
  • Full and low battery indications
  • Requires 9-Volt battery (sold separately)

Info & Guides

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Name Pin-Type Moisture Meter with LED Bar Graph Display Pin-Type Digital Moisture Meter with LCD Display Pinless Moisture Meter Professional Digital Pinless Moisture Meter with Backlit LCD
Brand General Tools General Tools Ryobi General Tools
Ratings (35) (40) (27) (28)
View Product View Product View Product View Product



Product Depth (in.)
Product Height (in.)
Product Width (in.)
5.85 in


Battery Power Type
Battery Size
Display Type
External Electrode
Abrasion-Proof Display Lens,Audible Alert
Maximum Moisture Reading (%)
Maximum Sense Depth (in.)
Measureable Materials
wood, drywall, carpet
Minimum moisture reading (%)
Number of Batteries Required
Product Weight (lb.)
Test Meter Type
Moisture Meter
Tools Product Type
Test Meter

Warranty / Certifications

Manufacturer Warranty
1 year

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Customer Questions & Answers

What is meant by 1% accuracy? Does this mean that 99% of the time it is wrong?

Asked by: Cindy
It means within a 1% accuracy, if it registers 55%, it would actually be 56%.
Answered by: Krysdi
Date published: 2016-08-25

Does this detect mold?

Asked by: Wyllow
No, just measures the current between the two prongs. If humid, more current.
Answered by: thegovie
Date published: 2016-10-26

Can i buy this at home depot store

Asked by: Gabby
Answered by: Diane Hewitt
Date published: 2017-02-27

Is this appropriate for testing new hardwood floors and the subfloor prior to installation?

New hardwood floor boards and your existing subfloor need to have between 6% and 12% moisture and both readings shouldn't vary by more than 4% of each other. This inexpensive meter appears to be just what I need for the job, but can anyone confirm? My flooring guide talks about "species specific" meter readings and changing settings depending on the species of wood. Does this meter have different settings for different materials? The new floor is 3/4 solid Acacia. I'd test these boards from the bottom and sides to conceal the pin holes... how deep does the pin have to go into the wood?
Asked by: Joe
insert pins at max depth of 1/4"
Answered by: Diane Hewitt
Date published: 2016-11-02
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Customer Reviews

Pin-Type Moisture Meter with LED Bar Graph Display is rated 4.3 out of 5 by 35.
Rated 1 out of 5 by from This meter gave the same reading if checking fresh cut wood or wood 2 years in garage.. same rea... This meter gave the same reading if checking fresh cut wood or wood 2 years in garage.. same reading if I emerced probes into shallow water..
Date published: 2017-07-21
Rated 3 out of 5 by from Some questions about calibration Before using, the unit required calibration. It did not perform as indicated on the instructions but no correcting actions were indicated. I am not sure that the readings I took were accurate because the unit failed its calibration test, or I was unable to follow the instructions.
Date published: 2015-05-05
Rated 5 out of 5 by from Moisture meter for $19.99 I've had a continuing roof leak since July 2014 (now Dec 10 2014) that caused ceiling damage. It supposedly had been fixed (6 times) and I was reluctant to get the ceiling fixed and painted. I had DRI Rite come to my house and do thermal imaging and use their water meter to see if it was still wet/moist. it was not which was what my new meter said and the exact same percentage. So I am pleased that for $20 it is very accurate.
Date published: 2014-12-10
Rated 5 out of 5 by from Very happy I got this tool after the hurricane for use in repair jobs. It works very well and is easy to read and enabled me to see where the areas of minor dampness were to save on demo costs. In the description of the product online this item is the only one that is listed that is self-calibrating. It arrived within two days.
Date published: 2011-11-22
Rated 5 out of 5 by from Super easy to use Our crawlspace was flooded for about a month and we needed to be certain it was completely dry before installing a new moisture barrier, insulation and subfloors. Mold growth is a major concern in the great Northwest so dry is key to home health.The hand held device was super easy to use, the light up reading features made it so easy to read under the house and let us know it was not dry enough {when we thought it was} so we didnt waste time and materials, installing before we should have. came 'batteries included" MIRACLE!
Date published: 2012-09-04
Rated 4 out of 5 by from Good purchase Only complaint about this product was that it was hard to see the moisture rating on the screen at arms length.
Date published: 2015-06-09
Rated 5 out of 5 by from Worked great! I recently had a flood in my house and was needing to know when I could shut off the fans used to dry out the sheetrock. This worked like a charm and helped me to aim the floor fans where they were needed the most... Now I'm confident that my walls are dry and ready to re-floor the house.
Date published: 2009-06-04
Rated 5 out of 5 by from For You Wood Workers I purchased this MM1E meter solely on its reviews, Most if not all of the reviews for this meter are based on home leaks and general contractor use, so for you wood workers that need a moisture meter, I give this one two thumbs up, so far it's been flawless for my needs.
Date published: 2013-08-03
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