--- product_id: 29722681 title: "MM8" brand: "general tools" price: "$199.25" currency: USD in_stock: true reviews_count: 13 category: "General Tools" url: https://www.desertcart.ec/products/29722681-mm8 store_origin: EC region: Ecuador --- # Backlit 2" LCD with 3-color LED alerts Measures moisture up to 3/4" deep Pinless, non-invasive sensing tech MM8 **Brand:** general tools **Price:** $199.25 **Availability:** βœ… In Stock ## Summary > πŸ’§ Stay ahead of leaksβ€”measure smarter, protect better! ## Quick Answers - **What is this?** MM8 by general tools - **How much does it cost?** $199.25 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/29722681-mm8) ## 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 - β€’ **Early Mold Prevention:** Detect leaks early with out-of-range and low battery alerts to protect your space - β€’ **Ergonomic & Intuitive:** Comfort grip with auto-calibrating, easy-to-read backlit LCD digits - β€’ **Instant Visual Alerts:** 3-color LED bar graph plus audible alarms for no-guesswork moisture levels - β€’ **Multi-Material Mastery:** Tailored settings for drywall, masonry, softwood, and hardwood accuracy - β€’ **Precision Moisture Detection:** Pinless tech reads up to 19mm deep without damaging surfaces ## Overview The General Tools LCD Moisture Meter MM8 is a professional-grade, pinless moisture detector designed for precise, non-invasive readings up to 3/4" deep in wood and building materials. Featuring a high-visibility backlit LCD, 3-color LED alerts, and ergonomic design, it offers tailored settings for drywall, masonry, softwood, and hardwood. Ideal for early leak detection and mold prevention, this tool empowers DIYers and pros alike to safeguard their spaces with confidence. ## Description You can always rely on our General Tools LCD Moisture Meter MM8 to give you the most accurate readings when measuring the moisture content in your basement, bathroom walls, and roof. Stop water damage and mold formation before it becomes problematic. Our tool features a hi-visibility white on black screen with LCD digits for easy readability from any angle. It also features an ergonomic construction and includes non-invasive sensing technology so that it won't scratch or mar the surface material. This handy device has separate out-of-range alarms for wood and building materials, and our humidity tester has colored green, yellow, and red LED visual alerts. It also features a hold function that freezes the reading so you can view it later.General Tools has been a recognized leader in the innovation, design, and development of specialized home inspector tools for many years. We encourage craftspeople, artisans, and DIYers to work smarter, measure better, and increase productivity. Review: Works great - This works way better than I expected for the price. Very easy to use. The only thing to be mindful of, it doesn't work for my house along the corners of any walls (I believe that's from the metal trim in the drywall interfering?) . I thought I had a major leak going on around a window until I realized it indicates anywhere there's an edge. But for basic leak detection outside of that, it works very well. Review: SUPER SIMPLE! No ambiguity here! - This is a great little moisture reader. I have tried other models and they give you some numbers and different modes for different types of material but what do you do with the numbers??? what is a "normal" reading? etc... I used this to detect possible leaks in the walls. Most moisture meters out there tend to specialize for measuring moisture in wood and various material. This one works really really well for regular dry wall! You drag it slowly along the wall near areas where you suspect there might be a leak. For my part, it discovered that while there was no pipe leak, there WAS a lot of wicking moisture from the grout in the shower to the backing drywall material (an old shower without a waterproof membrane). The meter was VERY clear. In most area, it would show 0% moisture. As I approached the shower, it gradually increased all the way to 100%... There is also a color scale indicator (from green (OK) to RED... bad/wet!). And once you pass a certain level of moisture, the meter will also beep! Like I said... NO AMBIGUITY with this device. It will tell you in simple terms: You are OK or HEY! There is excess moisture in this wall! Verdict: GET IT! Get it if you suspect moisture or water leak in a wall. At about 20% moisture, you may start having some mold in the wall. This meter is affordable... it's worth having one on hand! ## Features - HUMIDITY METER: It's ideal for measuring the moisture content of wood and construction materials. It features separate settings for drywall, masonry, softwood, and hardwood and includes non-marring sensing technology that protects surfaces. - EASY TO READ: This monitor features 2" (50mm) high backlit white LCD digits, auto-calibrating, a 3-color LED bar graph, and an audible alert accurate detection. The ergonomic handle design conforms to your hand for a comfortable user experience. - WATER LEAK SENSOR: It has no pins and can read the levels up to 3/4" (19mm) deep into the surface with an overall measurement of 0 to 53% for softwood and 0 to 35% for hardwood. It provides relative readings for wallboard and masonry. - DEEP DETECTION: Early prevention is vital when stopping mold formation. Check and test suspicious leak stains to determine if the area is wet or has already dried. It includes an out-of-range alarm and a low 9V battery alert. - GENERAL TOOLS: We have been a recognized leader in the innovation, design, and development of specialized precision tools for many years. We encourage craftspeople, artisans, and DIYers to work smarter, measure better, and increase productivity. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01BLXVDFA | | Battery Description | Alkaline | | Best Sellers Rank | #45,941 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #17 in Moisture Meters | | Brand Name | General Tools | | Color | White | | Customer Reviews | 4.4 4.4 out of 5 stars (864) | | Global Trade Identification Number | 00681035017340 | | Included Components | Console^Battery (1) | | Item Dimensions W x H | 2.8"W x 6.3"H | | Item Type Name | --- | | Item Weight | 0.34 Pounds | | LowerTemperature Range | 32 Degrees Fahrenheit | | Manufacturer | General Tools | | Mounting Type | Surface Mount | | Operating Humidity | 5% to 95% | | UPC | 735090905002 681035017340 | | Unit Count | 1.0 Count | | Upper Temperature Range | 104 Degrees Fahrenheit | | Voltage | 9 Volts | ## Product Details - **Battery Description:** Alkaline - **Brand:** General Tools - **Color:** White - **Item Weight:** 0.34 Pounds - **Product Dimensions:** 2.8"W x 6.3"H ## Images ![MM8 - Image 1](https://m.media-amazon.com/images/I/71YeWu4f4XL.jpg) ## Questions & Answers **Q: Does it sense moisture through a painted surface or just the moisture content of the paint?** A: It senses moisture through a painted surface. **Q: Can this be used on concrete and drywall?** A: Yes, the device has four modes. Wall, masonry, soft wood, hard wood. Wall is drywall. **Q: Can this be used to locate a leak behind drywall. The drywall is not showing wetness so the water is probably running down a stud or outside wall.** A: This tool will measure the moisture content of any building material including wood and drywall. If the test indicates a high moisture content in just one spot, you could probably conclude that there was a leak at that point. **Q: Will this unit work on a plywood sub floor, and hardwood flooring to verify the hardwood has properly aclimated for installation?** A: In order to get accurate readings you will need to make sure the two prongs on the top make contact with the area you wish to measure for moisture. The two prongs are pretty small and the tips are sharp. I was able to obtain readings on wet drywall, plywood and ceramic floor tile. As long as contact was made with the points it worked for me and the price is reasonable. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works great *by C***N on November 18, 2025* This works way better than I expected for the price. Very easy to use. The only thing to be mindful of, it doesn't work for my house along the corners of any walls (I believe that's from the metal trim in the drywall interfering?) . I thought I had a major leak going on around a window until I realized it indicates anywhere there's an edge. But for basic leak detection outside of that, it works very well. ### ⭐⭐⭐⭐⭐ SUPER SIMPLE! No ambiguity here! *by C***N on November 18, 2022* This is a great little moisture reader. I have tried other models and they give you some numbers and different modes for different types of material but what do you do with the numbers??? what is a "normal" reading? etc... I used this to detect possible leaks in the walls. Most moisture meters out there tend to specialize for measuring moisture in wood and various material. This one works really really well for regular dry wall! You drag it slowly along the wall near areas where you suspect there might be a leak. For my part, it discovered that while there was no pipe leak, there WAS a lot of wicking moisture from the grout in the shower to the backing drywall material (an old shower without a waterproof membrane). The meter was VERY clear. In most area, it would show 0% moisture. As I approached the shower, it gradually increased all the way to 100%... There is also a color scale indicator (from green (OK) to RED... bad/wet!). And once you pass a certain level of moisture, the meter will also beep! Like I said... NO AMBIGUITY with this device. It will tell you in simple terms: You are OK or HEY! There is excess moisture in this wall! Verdict: GET IT! Get it if you suspect moisture or water leak in a wall. At about 20% moisture, you may start having some mold in the wall. This meter is affordable... it's worth having one on hand! ### ⭐⭐⭐⭐ Limited Applications, But Works Very Well! *by T***T on August 18, 2016* This tool is very sensitive and is great at what it does. The LED readout that accompanies the LCD screen is really nice and there are pre-calibrated settings for different types of materials (drywall, wood, etc). The only downside I found with this particular "pinless" type unit is that the sensing portion is limited to a square pad on the back side of the unit. Unlike the "pin" type meters, this makes getting into tighter places very difficult. For instance, I wanted to check baseboards and grout seams for signs of moisture after a custom shower installation and it was virtually impossible to use this unit in the corners and at the base of the tile where I needed to measure. For applications that involve tighter areas as this or areas with inside corners, a classic "pin" type unit is much more convenient. All in all, this is a very nice unit for the price with a decent overall range and great sensitivity. Recommended! ## Frequently Bought Together - General Tools LCD Moisture Meter #MM8 - Leak and Humidity Detector - Pinless and Non-Invasive - 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 - Etekcity Infrared Thermometer Laser Temperature Gun 774, Meat Food Candy Oven Thermometer for Griddle Accessories, Heat Gun for Cooking Refrigerator Tools, Yellow --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ec/products/29722681-mm8](https://www.desertcart.ec/products/29722681-mm8) --- *Product available on Desertcart Ecuador* *Store origin: EC* *Last updated: 2026-04-24*