We had some roof leaks and needed to check where they were to air them out. This moisture sensor was reasonably priced and worked very well. As you can see in the picture, it will light up red when there is substantial moisture in your walls. Very happy with the product and would recommend (not happy about my roof leaks!).

Works well, easy to use, affordable

Super useful item. Works so good that it broke the news to me that the "seasoned" firewood I bought for $100 was in fact, not seasoned at all.

As a person who lives in rural Wisconsin and heats with firewood, this device is very handy to determine optimum moisture content levels before stocking my woodshed with our winter supply.The price was reasonable and it still works like new, 3 yrs after purchase.

I worked pest control for 4 years and was in thousands of crawlspaces in that time. I always had this meter with me to get moisture readings in the subfloor system while doing termite inspections and just general crawlspace inspections for moisture mitigation. This meter can take a beating over time and still keep on working. Extremely good on battery life as well. It may not give you the range of information that other meters out there can, but it's simple and it does exactly what it's supposed to. It always seemed to be accurate as well, when compared to similar models from other brands that co-workers used.

I purchased this to check recent water damage in my house and it worked well but the tips seem fairly delicate. I ended up also purchasing a moisture meter from Klein that read from the surface rather than probes that needed to be pushed into the piece you're checking. Since the General Meter was accurate and did work I went ahead and kept it also. I gave it 4 stars instead of 5 due to the probe tips.

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.

Cumple su función a la perfección

Easy to use with timber

Super product. It is actually worth when you see it perform accurately and reliably. Sound and light indications for medium and high moisture levels. It is value for money if measuring moisture is critical in your application

This tool saved me a ton of money. I had a flood and when the restoration company assured me that it hadn't gone under the subfloor in the kitchen I got suspicious. So, I bought this item and took a reading. Well it showed excessive moisture under the subfloor. Then I called the company and told them what the moisture reading was they immediately sent another estimator who confirmed my suspicions. Besides as a bonus once the project manager found out I had a moisture meter there was no more of the "it should be dry" excuses because I'd go with him and take my own readings. LOL.Living on the wet coast this is a great tool for any homeowner and I've used it pretty much everywhere in my home including the attic. It may not be perfectly accurate but it's definitely accurate enough to let you know if you have problems so they don't become major issues. So I'd definitely recommend this tool for anyone who wants a cheap effective way to check moisture in building materials and burnable wood.

I recently noticed a small crack in my ceiling that has a large brown outline around it. The brown outline is clearly water damage, but while the crack is definitely new, I cannot tell if the water damage has always been there or not. I bought this device to help me to determine if I need to call in a professional.The product arrived today, as expected. It was in its retail packaging, which is a clamshell. You'll need scissors to open it up. A 9v battery was also inside the clamshell. I'm not sure why the change, but I'm really happy that companies are now including batteries with their toys.So I took the meter out of the packaging and put in the battery. No screws to take out or anything. The battery cover just clips back on.The device couldn't be much easier to use. There are only 3 buttons..1. Power. Hold this to turn the moisture meter on and off2. Mode. Press this to switch between wood and "construction material" mode.3. Lock/Sound. Press this toggle "lock" of the display in case you want the percent to stay on the screen. Hold this to toggle whether or not the device beeps (you probably don't want it to beep).I'd be testing my drywall ceiling, so I put the moisture meter into "construction material" mode. I was hoping I wouldn't need to jam it into my ceiling to see the results, so I first tested a part of the ceiling I knew did not have a leak. The meter read about 3%. I moved over to the brown spot and pressed the needles against the ceiling (I didn't push in) and, depending on where I was along the brown spot, the reading ranged from about 2%-6%. According to the guide on the back of the device (which is great), this means my ceiling is not very moist. Obviously that was good news.Then I started to worry that the device would not function right if it wasn't fully pushed into the ceiling. I really did not want to put holes in the ceiling, but I figured that in the best case, I'd need to paint over the brown spot anyway, so two little holes couldn't hurt. So I jammed the needles into the ceiling in a few places and getting a consistent reading was not easy. In a few of the spots, the percentage changed from between 1%-2%, then from 7%-10% and back again. I wasn't moving the meter -- it just could not decide the moisture level. Now, I understand the science behind the device (at least I think I do), so I get that I could have been moving it a little or maybe I was there was some movement within the ceiling so the circuit was not continuously completed.. I'm really not sure. I tried a few different places in the ceiling, and in the end, I have slightly more confidence that there is not a leak on the ceiling, but I am not sure about it. Hopefully if there was a leak, the device would be more decisive in telling me about the moisture.Overall, I think I'm happy about the purchase, but only because I got a little extra confidence for $30, which is probably less than I would have paid an "expert" to come and check it out. If you're a home inspector or contractor who will be charging people for your use of a moisture meter, I would look into the more expensive options, but for a homeowner who does not want to pay $100+ for a device you'll probably use 2-3 times in your lifetime, this one will give you a little more information than you currently have.In summary, very easy to use, but I'm not completely confident in its ability to give reliable results.

Die Funktion ist einfach und gut ablesbar, doch eine Beschreibung ohne deutsch ist schlecht zu gebrauchen.Das gesamte Ergebnis ist aber gut.