General ToolsMMD4E Digital Moisture Meter, Water Leak Detector, Moisture Tester, Pin Type, Backlit LCD Display With Audible and Visual High-Medium-Low Moisture Content Alerts, Grays
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General ToolsMMD4E Digital Moisture Meter, Water Leak Detector, Moisture Tester, Pin Type, Backlit LCD Display With Audible and Visual High-Medium-Low Moisture Content Alerts, Grays

4.5/5
Product ID: 1096279
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12 interest-free installments with tabby

Details

  • Color
    Gray
  • Brand
    General Tools
  • Product Dimensions
    9.5"W x 1.4"H
  • Battery Description
    Alkaline
  • Lower Temperature Rating
    32 Degrees
📊Backlit LCD with 0.3" digits
📍8mm stainless steel pins for precise readings
🔔Audible & visual high-medium-low alerts

Description

🔍 Stay ahead of hidden water damage with precision you can trust!

  • MULTI ALERT SYSTEM - Audible tones and on-screen icons signal low, medium, or high moisture content instantly.
  • PORTABLE READY TO USE - Compact design powered by included 9V battery with extra pins and calibration cap.
  • PRECISION PIN TYPE SENSOR - 8mm stainless steel pins ensure accurate readings in wood, drywall, and concrete.
  • INSTANT MOLD RISK DETECTION - Quickly identify moisture levels to prevent harmful black mold growth.
  • USER FRIENDLY BACKLIT DISPLAY - Large 0.3" digits with backlight for easy reading in any lighting condition.

The General Tools MMD4E Digital Moisture Meter is a professional-grade pin-type moisture tester designed for quick, accurate detection of moisture levels in wood, drywall, and concrete. Featuring a backlit LCD with large digits, audible and visual alerts for moisture content, and durable 8mm stainless steel pins, it empowers homeowners and professionals to prevent mold and water damage effectively. Compact, battery-powered, and ready to use with included accessories, it’s the essential tool for smart moisture management.

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Specifications

ColorGray
BrandGeneral Tools
Product Dimensions9.5"W x 1.4"H
Battery DescriptionAlkaline
Lower Temperature Rating32 Degrees Fahrenheit
Mounting TypeSurface Mount
Upper Temperature Rating60 Degrees Celsius
Voltage9 Volts
Temperature Accuracy3
ManufacturerGeneral Tools
UPC012301860924 716080037835 885312937219 885265551395 885367884865 681035414477 069060294668 031112659039 885898031110 522536779064 971483008299 031113382226
Global Trade Identification Number00885265551395, 00681035414477
Part NumberMMD4E
Item Weight3.98 ounces
Country of OriginChina
Item model numberMMD4E
Batteries1 Product Specific batteries required. (included)
Is Discontinued By ManufacturerNo
SizePin Type
StyleDigital Pin Type, Visual & Audible Alerts
PatternDigital Moisture Meter
ShapeDrywall
Power SourceBattery Powered
Item Package Quantity1
Measurement SystemMetric
UsageInside; Amateur, Inside; Professional
Included ComponentsMoisture meter, batteries, extra pins
Batteries Included?Yes
Batteries Required?Yes
Battery Cell TypeZinc Carbon
Description PileAlkaline
Warranty Description1 Year

Have a Question? See What Others Asked

accuracy
Can I use this product to rule out a plumbing leak under my concrete bathroom floor. The outer bathroom wall is concrete & paint is bubbling.
I have a wooden floor that is swelling little bit. I know I had a small water leak. Can this tool help me to check if there is moisture underneath?
Will it measure moisture in drywall?

Reviews

4.5

All from verified purchases

H**R

excellent tool

Works very well. Easy to use. Minimal skill required to operate. What i expected

A**I

Works great!

Worked great right out of the box! We had a spot on our ceiling that looked damp and I wanted to see if there was actually water in it, so bought this. Works awesome, eased our minds and now we get to repair an old leak!

A**N

Great moisture reader

Product was on sale and I needed to see if there was moisture in my wallProsAccuracy in Penetrative Readings – Pin-type moisture meters provide precise readings for moisture content within the material, making them ideal for professionals in woodworking, construction, and home inspection.AffordabileIdeal for Detecting Deep Moisture – Since the pins penetrate the material, they are more effective at detecting moisture inside a surface rather than just on the exterior.ConsSurface Damage – The biggest downside of pin-style moisture meters is that they leave small holes in the material. This can be problematic for finished wood, drywall, or other delicate surfaces.Limited Coverage Area – Since readings are taken at the exact points where the pins are inserted, multiple tests are required to assess moisture distribution over a large area.Inconsistent Performance on Hard Materials – meter struggles with denser woods or materials that resist penetration, leading to unreliable readings or difficulty inserting the pins.Would not spend more than 20-30 $

D**R

its a good choice

easy to read, easy to use. seem very accurate.

M**N

Better than Guessing... It's Science!

I'm a potter with a wood fired kiln in Northern Michigan, and I have to know that my wood is dry, dry, dry: 15% (20% at the very most) moisture content. I've had 2 different moisture meters, and like this one best. It's accurate. Easy to read indoors and outdoors. I've dropped it several times; it didn't break or crack or start acting up. The batteries last a long time, are easy to change, and that little door that holds them in hasn't broken.I originally got this to use at the kiln, but now I also use it to check the wood I heat my house with. No more guessing. The most important factor in getting a clean burn and maximum BTU's out of your wood is low moisture content. If that's important to you, get one of these gadgets.Right price, good screen size, simple to use, accurate.

B**Y

works great

love this . takes me right to the bad spot easy to use. easy to put together. seems to be accurate.

T**C

Highly recommend.

Works as good as I’d hoped. Saved me some money forst use in buying cooking wood making sure it really was seasoned and ready to burn

R**C

What the Factory Says!

So, a nice device but some caveats. In order to get the 'factory approved' read you MUST push the pins into the wood "all the way" (yes, about a good 1/3 of an inch) or it simply isn't the devices best read. Now for those who cannot get that full insertion General makes the MMD7NP which does mostly the same thing without pins! Less overall effort. Not an issue into, say, drywall but you will find 'hard firewood' (read, long burning) can be difficult to obtain full insertion (and REMEMBER these comments, instructions are direct from a live factory rep)... suggested testing methods of, as an example, firewood is to split it open so you can measure internal and external (and the internal that I measured on a piece of firewood was about 20% while the skin or bark fully inserted was 7.5%... so big difference and maybe enough to cause the wood to start easy and then die out? As most have commented there is NO included manual, factory notes that is on purpose and suggests obtaining it from their website as a PDF. This is a simple device and there is one page of instructions on the site however for inclusiveness sake the 'other languages' make up many more, perhaps why they stopped printing. Fabricated woods or building materials should be easy to test, soft woods firewood would also be agreeable but 'real hardwood' will be more difficult to pin test or 'rip' and test both internal and outer regions for dryness. The device can withstand some real pressure to "insert" but don't twist or bend while inserting, the results are broken pins and no reading.

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

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Secure Transaction
12 interest-free installments with tabby

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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The customer service exceeded my expectations. Perfect for buying products you can't find elsewhere.

1 week ago

General Toolsmmd4e Digital Moisture Meter Water Leak Detector Moisture Tester | Desertcart UAE