---
product_id: 1096279
title: "MMD4E Digital Moisture Meter, Water Leak Detector, Moisture Tester, Pin Type, Backlit LCD Display With Audible and Visual High-Medium-Low Moisture Content Alerts, Grays"
brand: "general tools"
price: "R$683"
currency: BRL
in_stock: true
reviews_count: 12
category: "General Tools"
url: https://www.desertcart.com.br/products/1096279-mmd4e-digital-moisture-meter-water-leak-detector-moisture-tester-pin
store_origin: BR
region: Brazil
---

# Measures 5-50% wood moisture Audible & visual moisture alerts Includes 9V battery & replaceable pins MMD4E Digital Moisture Meter, Water Leak Detector, Moisture Tester, Pin Type, Backlit LCD Display With Audible and Visual High-Medium-Low Moisture Content Alerts, Grays

**Brand:** general tools
**Price:** R$683
**Availability:** ✅ In Stock

## Summary

> 💧 Stay ahead of hidden leaks with precision and style!

## Quick Answers

- **What is this?** MMD4E Digital Moisture Meter, Water Leak Detector, Moisture Tester, Pin Type, Backlit LCD Display With Audible and Visual High-Medium-Low Moisture Content Alerts, Grays by general tools
- **How much does it cost?** R$683 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/1096279-mmd4e-digital-moisture-meter-water-leak-detector-moisture-tester-pin)

## Best For

- general tools enthusiasts

## Why This Product

- Trusted general tools brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Alerts System:** Visual icons and 8 customizable audible tones instantly notify you of low, medium, or high moisture levels—never miss a leak again.
- • **Versatile Leak Detector:** Ideal for contractors and homeowners to detect water damage in wood, drywall, concrete, and more—protect your investment.
- • **Ergonomic & User-Friendly:** Compact, one-hand design with a large backlit LCD ensures quick readings even in dim spaces—work smarter, not harder.
- • **Durable & Replaceable Pins:** Stainless steel pins penetrate surfaces for reliable readings and can be replaced free of charge, extending tool life.
- • **Precision Moisture Detection:** Pin-type sensor reads moisture from 5% to 50% in wood and 1.5% to 33% in building materials for pinpoint accuracy.

## Overview

The General Tools MMD4E Digital Moisture Meter is a professional-grade pin-type moisture tester designed for accurate detection of moisture levels in wood (5-50%) and building materials (1.5-33%). Featuring a backlit LCD, audible and visual alerts, and ergonomic design, it empowers contractors and homeowners to quickly identify water damage and prevent mold growth. The tool includes a 9V battery, replaceable stainless steel pins, and a hold function for convenient readings, making it an essential device for smart moisture management and leak detection.

## Description

Brand:General Tools Color:Grays Features: Moisture meter features an easy-to-read LCD display for quick and easy viewing; ergonomic size fits in one hand Ideal for contractors and homeowners to measure moisture content in wood, concrete drywall and subflooring; essential water damage tool Moisture detector has a wide and precise measuring range; stick the stainless steel pins into the surface of what you are measuring in order to get a read-out Never buy water logged wood again; woodworking tool measures the moisture content of wood before buying;Auto power off Can be used as a water leak detector after flood damage, or general water damages Publisher:General Tools Warranty:1 Year Details:General Tools MMD4E Moisture Meter, Pin Type, Digital LCD UPC:012301860924 EAN:0522536779064 Package Dimensions:9.0 x 5.4 x 1.2 inches

Review: Great product; it measures wood from 5 - 50% +/- 3% accuracy - We were getting hardwood floors installed - or so we thought - when the installers notified us that they could not do the installation because the wood in our house had acclimated to 6.4% moisture and our subfloors were at 12.8% moisture. The installer found a leak in our water softener line which we got fixed the next day. Unfortunately, we had no way of knowing (ourselves) when to call the installer back. Hence, we purchased this meter. As far as we know, it works great. We aren't too concerned with the overall accuracy of the instrument, +/- 3% is just fine for us as we're looking to compare the difference between two materials in our home (assuming the error is consistent between those readings). The resolution of the meter is 0.1%. Other things you might want to know: - It comes with it's own 9v battery. - It measures wood between 5 - 50% and 1.5 - 33% for other building materials. - It has a hold feature which allows you to save the current reading so you don't have to keep the meter jammed in the material you are measuring. - It beeps to let you know when it is done measuring. (Although, you can turn this off. We did accidentally and then figured out how to put it back on. We don't know why, but it has 8 different tones from which you can select.) - It has a toggle button between measuring wood and concrete (or other building materials). - The instruction manual is easy to read and follow. They come in English, French, and Spanish. - It uses a two pin system to measure the electrical resistance of the material between the two pins. This is then calibrated against moisture content to give you the reading as a percentage. This means that it will make two small pin holes in the wood you are trying to measure. Therefore, if you are concerned about the holes, consider a "pinless" moisture meter, which are much more expensive. The instruction manual lists other uses such as testing the moisture content of powders (for any scientists out there who need to measure such things for making standard solutions from scratch) and to test the dryness of a wall or furniture before painting or finishing. It also shows instructions for how to track down a leak using the meter. There's a funny picture in the instructions with the caption "be careful not to hurt your hands on the pins." Although, I did "test" the moisture content of my husband's leg. Don't worry, I didn't draw blood. Overall, for the price, the features, and the product functionality (so far), I would say this is a great buy. Also, we got it shipped quickly via desertcart.com. It arrived two days after we purchased it. Yay! UPDATE (7/31/2010): The pins broke when we were testing some brazilian walnut - one of the hardest woods out there. But I read in the instruction manual that pins were replaceable. I emailed General Tools through their website and got a quick email back. Less than a week later, I had two new prongs FOR FREE in my mailbox. Customer Service was AMAZING! The replacement prongs are much better than the ones that came with the meter. The new ones are shaped like little cones and have worked great on the harder woods.
Review: Decent Unit - The General Tools MMD4E Digital Moisture Meter is an indispensable tool for anyone dealing with moisture-related issues. From the moment I started using it, I was impressed by its accuracy and ease of use. Whether I'm checking for water damage in walls, floors, or ceilings, this moisture meter provides precise readings with just the press of a button. What sets the MMD4E apart is its versatility and reliability. It features a wide moisture detection range, allowing me to accurately assess moisture levels in various materials, from wood and drywall to concrete and plaster. Plus, its compact size and ergonomic design make it comfortable to hold and use for extended periods. Overall, the General Tools MMD4E Digital Moisture Meter is a must-have tool for contractors, homeowners, and DIY enthusiasts alike. Its accuracy, versatility, and ease of use make it an invaluable asset for identifying and addressing moisture issues quickly and effectively. I highly recommend it to anyone in need of a reliable moisture meter.

## Features

- HUMIDITY SENSOR: Our handy meter tool can quickly determine what level of remediation is needed to keep your family safe from black mold. High levels of dampness that go untreated are the leading cause of harmful fungus growth in the home.
- WATER LEAK DETECTOR: Finding the moisture content in your wood or drywall is the first step in early prevention. Continuously check and test suspicious water stains around the house so you can determine whether the area is wet or has already dried. Low, medium and high moisture tones and on-screen icons, Reading HOLD button
- MOISTURE READER: The mold test features large 0.3" high digits in a backlit LCD for quick and easy detecting. Our mildew scanner includes extra 8mm stainless steel pins, a protective cap that doubles as a calibration checker, and a “9V” battery.
- MOLD TESTER: For an accurate test read, stick the stainless steel pins into the surface of what you're measuring. The gauge has a broad range of 5 - 50% for wood and 1.5 - 33% for building materials such as concrete and drywall.
- GENERAL TOOLS: We're a recognized leader in designing and developing specialized precision tools dedicated to delivering exceptional customer service. We encourage artisans and DIYers to work smarter, measure better, and repair more productively.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00275F5O2 |
| Batteries | 1 Product Specific batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Zinc Carbon |
| Battery Description | Alkaline |
| Best Sellers Rank | #550 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Moisture Meters |
| Brand | General Tools |
| Color | Gray |
| Customer Reviews | 4.5 4.5 out of 5 stars (14,889) |
| Date First Available | July 19, 2008 |
| Description Pile | Alkaline |
| Global Trade Identification Number | 00681035414477, 00885265551395 |
| Included Components | Moisture meter, batteries, extra pins |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 5.6 ounces |
| Item model number | MMD4E |
| Lower Temperature Rating | 32 Degrees Fahrenheit |
| Manufacturer | General Tools |
| Material | Plastic |
| Measurement System | Metric |
| Mounting Type | Surface Mount |
| Part Number | MMD4E |
| Pattern | Digital Moisture Meter |
| Power Source | Battery Powered |
| Product Dimensions | 9.5"W x 1.4"H |
| Shape | Drywall |
| Size | Pin Type |
| Style | Digital Pin Type, Visual & Audible Alerts |
| Temperature Accuracy | 3 |
| Temperature Reading Accuracy | plus_minus_3_degrees_fahrenheit |
| UPC | 012301860924 716080037835 885312937219 885265551395 885367884865 681035414477 069060294668 031112659039 885898031110 522536779064 971483008299 031113382226 |
| Upper Temperature Rating | 60 Degrees Celsius |
| Usage | Inside; Amateur, Inside; Professional |
| Voltage | 9 Volts |
| Warranty Description | 1 Year |

## Product Details

- **Battery Description:** Alkaline
- **Brand:** General Tools
- **Color:** Gray
- **Lower Temperature Rating:** 32 Degrees Fahrenheit
- **Product Dimensions:** 9.5"W x 1.4"H

## Images

![MMD4E Digital Moisture Meter, Water Leak Detector, Moisture Tester, Pin Type, Backlit LCD Display With Audible and Visual High-Medium-Low Moisture Content Alerts, Grays - Image 1](https://m.media-amazon.com/images/I/61+4TbrH9kL.jpg)

## Available Options

This product comes in different **Pattern** options.

## Questions & Answers

**Q: accuracy**
A: I found the stated range of error to be ambiguous. It was stated as being within 3% of the reading. But the units of measure of the reading are themselves in percent.So I wrote the following to the manufacturer, asking if I had a reading of, say, 10% did that mean the range of error was 9.97 - 10.03% or 7 - 13%.This was their reply:The accuracy is ±(3% + 3 digits) as stated in the manual.  To use your example, if the meter reads 10% then it is really between 7%-13%.  The website will be updated accordingly.  Thank you for bringing this to our attention and if there is anything else you have questions about, please feel free to contact us.

**Q: 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.**
A: It won't show thru the cement unless it is wet. Also is the wall an exterior wall & you could be getting moisture there. With the paint bubbling you do have a water problem from some where inside or out, but you could check with the tool on the inside in the wall real low next to the cement. It worked real well for my particular problem without tearing up the carpet to find my problem. Hope this helps.

**Q: 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?**
A: ABSOLUTELY!  This is just what you need, it tells you the exact moisture where the contacts touch the wood.  There is a small button on the face right under the word GENERAL that allows you to pick wood or concrete.  I use it on our Maple flooring in the summer to see where we are with water content.

**Q: Will it measure moisture in drywall?**
A: Yes.   It has two features (1) Wood which I use on dry wall, wood, plastered walls, carpeting.. (2) Building material which I use on concrete floors, concrete blocks...  I have found it works well on concrete and I can trace moisture in our basement floors which has helped to target where work needs to be done in outside grading.  By the way I am a 78 year old woman and have had "fun" using this meter.  Money well spent.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product; it measures wood from 5 - 50% +/- 3% accuracy
*by H***I on July 13, 2010*

We were getting hardwood floors installed - or so we thought - when the installers notified us that they could not do the installation because the wood in our house had acclimated to 6.4% moisture and our subfloors were at 12.8% moisture. The installer found a leak in our water softener line which we got fixed the next day. Unfortunately, we had no way of knowing (ourselves) when to call the installer back. Hence, we purchased this meter. As far as we know, it works great. We aren't too concerned with the overall accuracy of the instrument, +/- 3% is just fine for us as we're looking to compare the difference between two materials in our home (assuming the error is consistent between those readings). The resolution of the meter is 0.1%. Other things you might want to know: - It comes with it's own 9v battery. - It measures wood between 5 - 50% and 1.5 - 33% for other building materials. - It has a hold feature which allows you to save the current reading so you don't have to keep the meter jammed in the material you are measuring. - It beeps to let you know when it is done measuring. (Although, you can turn this off. We did accidentally and then figured out how to put it back on. We don't know why, but it has 8 different tones from which you can select.) - It has a toggle button between measuring wood and concrete (or other building materials). - The instruction manual is easy to read and follow. They come in English, French, and Spanish. - It uses a two pin system to measure the electrical resistance of the material between the two pins. This is then calibrated against moisture content to give you the reading as a percentage. This means that it will make two small pin holes in the wood you are trying to measure. Therefore, if you are concerned about the holes, consider a "pinless" moisture meter, which are much more expensive. The instruction manual lists other uses such as testing the moisture content of powders (for any scientists out there who need to measure such things for making standard solutions from scratch) and to test the dryness of a wall or furniture before painting or finishing. It also shows instructions for how to track down a leak using the meter. There's a funny picture in the instructions with the caption "be careful not to hurt your hands on the pins." Although, I did "test" the moisture content of my husband's leg. Don't worry, I didn't draw blood. Overall, for the price, the features, and the product functionality (so far), I would say this is a great buy. Also, we got it shipped quickly via Amazon.com. It arrived two days after we purchased it. Yay! UPDATE (7/31/2010): The pins broke when we were testing some brazilian walnut - one of the hardest woods out there. But I read in the instruction manual that pins were replaceable. I emailed General Tools through their website and got a quick email back. Less than a week later, I had two new prongs FOR FREE in my mailbox. Customer Service was AMAZING! The replacement prongs are much better than the ones that came with the meter. The new ones are shaped like little cones and have worked great on the harder woods.

### ⭐⭐⭐⭐⭐ Decent Unit
*by C***S on April 18, 2024*

The General Tools MMD4E Digital Moisture Meter is an indispensable tool for anyone dealing with moisture-related issues. From the moment I started using it, I was impressed by its accuracy and ease of use. Whether I'm checking for water damage in walls, floors, or ceilings, this moisture meter provides precise readings with just the press of a button. What sets the MMD4E apart is its versatility and reliability. It features a wide moisture detection range, allowing me to accurately assess moisture levels in various materials, from wood and drywall to concrete and plaster. Plus, its compact size and ergonomic design make it comfortable to hold and use for extended periods. Overall, the General Tools MMD4E Digital Moisture Meter is a must-have tool for contractors, homeowners, and DIY enthusiasts alike. Its accuracy, versatility, and ease of use make it an invaluable asset for identifying and addressing moisture issues quickly and effectively. I highly recommend it to anyone in need of a reliable moisture meter.

### ⭐⭐⭐⭐ For professionals
*by H***. on December 27, 2025*

It seemed to work ok but when I got my house tested by a professional the results were very different. I was easy to use however, you do have to make holes in the wall. Its battery life seemed good as well as calibration capability. I would only use if I was a professional. Otherwise do not waste your time.

## Frequently Bought Together

- General Tools MMD4E Digital Moisture Meter, Water Leak Detector, Moisture Tester, Pin Type, Backlit LCD Display With Audible and Visual High-Medium-Low Moisture Content Alerts, Grays
- Klein Tools ET140 Pinless Moisture Meter for Non-Destructive Moisture Detection in Drywall, Wood, and Masonry; Detects up to 3/4-Inch Below Surface
- General Tools PIN3 Replacement Pins for MMD4E, RHMG650 and RHMG700DL Silver

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-22*