Your cart is empty.
Your cart is empty.You can count on our General Tools 4-in-1 Digital Moisture Meter to give you the most accurate readings when it comes to tracking down pesky mold in your home. Our humidity tester provides a moisture level range of 5% - 50% in wood and 1.5% - 33% in building materials, such as concrete and drywall. It has an auto diagnostic check and auto power off after 3 minutes and includes a solid 9-volt battery. The gauge also comes with a lanyard, 2 sets of spare pins, and a user's manual. The sturdy, ergonomic shape and rubber side grips allow for comfort even when using for multiple measurements. Every mold detector has a hold function, saving a read to view later. At General Tools, we offer over 1,000 products to choose from. We're proud to provide merchants, artisans, and DIYers worldwide with a broad range of affordable, specific-purpose mechanical hand tools and precision measuring and inspection gear.
Raul Duke
Reviewed in the United States on March 2, 2025
I use it for my job. I’m a regional maintenance director for a property management company and this comes in handy works really nice. Easy to use.
Bryan H.
Reviewed in the United States on February 19, 2025
When I touch the pads or pins to my hand I get a reading. When I put the pads to wood or insert the pins it does not read. Returning.
sean whittaker
Reviewed in the United States on January 12, 2025
Have purchased this before but returned it last time as I couldn't get the calibration process to work or it was malfunctioning. This time I realized using the longer pins that I cannot put the cap back on. This kind of defeats the purpose in addition to only having it 6 months or less and the calibration does not appear to be working for either the wood or bldg materials range. Will be reaching out to warranty dept. Been tough finding a good moisture meter that lasts.
MDK
Reviewed in the United States on May 4, 2024
I'm a general contractor and I find myself occasionally having to test for moisture in a client's home. This is my second General Tool moisture meter. This model - the MMH800 - has more functions then my previous one including the ability to test for moisture as well as providing a temperature readout. The meter is a dual-function pin and pin-less model which allows testing without leaving holes in walls or woodwork.I had the opportunity to be on a customer site with a mold remediation tech who was taking moisture readings to determine possible wet areas that might have been contributing to a mold issue. The tech didn't tell me the model he was using other than it was a professional -series, scan-only type and that it was very accurate with a good scan depth. When I compared my readings from the MMH800 with the tech's meter I found very little differences in the readings.There is one inherent limiting factor with all pin meters and that is they only test to the depth of the pins, useful on drywall or wood but very limited on masonry and/or concrete. Concrete testing is virtually unreliable due to the penetration issue. The ability to take a scan reading alleviates some of that issue.What I like most about the MMH800 is that is reasonably accurate and affordable. Adding a moisture meter (along with a good gas sniffer) to my tool bag provides data which ultimately allows me to better serve my customers.
Mark S.
Reviewed in the United States on November 29, 2024
This is a solid performing meter a step above the baseline meters plus it has a built-in display for temperature and humidity which is handy especially when measure moisture in attics and crawlspaces.
Dane Peterson
Reviewed in Canada on April 23, 2024
Works as intended for my testing of new wood construction pre insulation and vapour barrier
Bob...
Reviewed in Australia on June 4, 2023
For the price paid I can't expect any more, got the work done.
P Brenner
Reviewed in Canada on March 20, 2022
Needed to check moisture level in wood prior to planing and finishing. Easy to use / read and accurate.
Eric
Reviewed in Canada on October 28, 2021
Seems to work fine but stopped working at cooler temperatures. Once I brought it back into a warmer place it started working again.
Loren McConnell
Reviewed in the United States on April 29, 2021
I bought this meter to check moisture content in prefinished hardwood flooring in my house and the subfloor. The prefinished flooring was well dried -- it must have a moisture content of about 6%, maybe less. But this meter bottoms out at 5% and gives no reading or varying readings close to that, especially in hardwood. With the plywood subfloor and other pine lumber, the meter works reliably, but not on the kiln-dried hardwood -- it is too dry. I have access to some home-milled oak and walnut that has been stored outside, and the meter worked well on that, giving readings of 12-15%. New, undried, construction lumber also produced expected readings. So, this meter does work, but be aware that it may not work well a the very dry end of its range.
Roger Kozak
Reviewed in Canada on August 9, 2018
I was having a problem with moisture in a couple of basement apartments so I wanted to determine the source of the moisture. This tool appears to work very well for this application.
Jnietocol
Reviewed in the United States on May 5, 2018
Good product! I chose this because it can measure 3 functions (moisture, RH and temperature) and has pin and pinless options. Work with acceptable accuracy, enough to detect wet areas.Recommendation for manufacturers: The lid does not fit when using the 10 mm pins, it was designed only for 5 mm pin.I recommend this product very well. Others are worth 4-5 times more!
Customer
Reviewed in the United States on February 19, 2018
I use this tool for RH(relative humidity)when installing hardwood floors. I also use it to probe into hardwood and subfloors to make sure there moisture levels are good. I have had 2 of these tools and I think they work very well. They stay accurate and true. I like to replace mine every 18 months because I rely on it a great deal for my job. Good price for a good tool!!
Recommended Products
