General Tools MMD4E Digital Moisture Meter
by General Tools
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Product Details
Manufacturer: General ToolsModel: MMD4E
Product features:
- Easy-to-read LCD display
- Ideal for construction, farming, and painting
- Wide measuring range
- Test moisture content of wood before buying
- Locate water leaks
Tools and Hardware Reviews of General Tools MMD4E Digital Moisture Meter
Customer Review: Great product; it measures wood from 5 - 50% +/- 3% accuracy
Summary: 5 Stars
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.
Description of General Tools MMD4E Digital Moisture Meter
Generals ultra-sensitive Digital Moisture Meter easily detects hidden leaks in wood, concrete, plaster and carpet. Providing accurate moisture level readings make this moisture meter great for new home inspections, locating roof leaks or even selecting dry lumber at the yard. Ideal to use in woodworking, building construction, agriculture restoration and floor-laying. Used to check wood, drywall and concrete before painting, sealing or treating and locate and identify water leaks in roofs, floors and walls. Features LED display, wide measuring range, strong stainless steel pins, audible alarms and battery status indication. Display will show the moisture content in Percent Moisture Content directly. Ergonomically designed and CE approved.Moisture Meters Tools
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