Moisture meters are an awesome to help someone learn what wood is dry and what is not. As one learns through using the moisture meter, the need for it becomes less and less. I still like to play around with mine. Honestly its a 2o dollar investment at most.
I bought the one at Lowe’s simply because I didn’t have to send away for it. I had bought three of those super cheap ones on Amazon. ($7) Seemed to work well but don’t last long. Drop it or push the pins too hard and they’re done.
Yes also masonry would also apply to dry wall. Some would use that kind of application to find air and moisture leaks. Brad I use the General, bought at lowes, have had the digital number display and then the light display. Normally I’ve used it to try on wood that I’m looking to see if it’s dry enough to be burned currently or wait. Not all wood is obvious to be ready to burn. I often seek out pallets and dunnage, they often sit for long periods of time and readiness can be the luck of the draw. Otherwise will be wet and heavy for 4x4 material but often because it’s beloved oak as well. Too hard to pass up when the blocks cut to size will burn like crazy later on. Rest of the time I’m curious to how well one pile has been drying since some in one place will dry quicker than another.
My meter has two modes. The one for masonry/drywall has an icon on the screen that looks like a concrete block wall. The one for wood has an icon that looks like a log. I suppose that could be a round board, not a log.
I have 2. One is the Ligno meter, it's best for lumber. Just got this one from Lowe's, maybe $30. Really like it. Easy to read and operate.