General ToolsLCD Moisture Meter #MM8 - Leak and Humidity Detector - Pinless and Non-Invasive

The unit worked just fine and was quite useful from mid-March to mid-June. Then, suddenly something happened, and the sensitivity suddenly dropped on all ranges. it still feels the hand, but on the wall, masonry, softwood and hardwood shows only 0, where an hour ago I saw 15 to 55% of moisture. Replaced the battery with fresh one - nothing changes. Opened the case and did not see any broken wire. Actually, pretty nice design and well manufactured (I can tell that being a professional in engineering), but is completely useless now.UPDATE: contacted warranty department and they responded with the advice - recalibrate the unit. Pretty simple operation, and they attached the manual, so took about a minute to do. The unit works fine again, and I love the customer support!

We recently had a plumbing leak that resulted in water under the flooring and also in the drywall. We had professional mitigation come to dry everything. The noise of multiple large fans and dehumidifiers was overpowering and we were anxious to have the process finished. We ordered this moisture meter so we could judge the progress ourselves. I feel that it definitely helped shorten the process because we could be confident that the walls were dry. The meter functioned quickly and accurately. It was easy to understand the readings.

The meter will work on most surfaces but it is not a complete answer.

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!

Nice product and run well for moisture measuring

Metal studs behind drywall give false high moisture readings.

This is a wonderful tool. When I received it I was testing it on different areas in the house where there was water damage. It works perfectly. I even placed it on the toilet tank, etc. I was very impressed with the performance. I also purchased one for my sister.

It does as it says and super affordable.