The most common problems caused by moisture in wood are finishes that don’t stick, joinery that breaks apart, and boards that take on new and unwanted shapes after milling. The solution to all these problems is to use wood that has been dried to the right moisture content, between 8% and 12%. And the easiest way to determine moisture content is to use a moisture meter.

Moisture meters use either pins or an electromagnetic plate (pinless) to measure moisture. Some pin-style meters take deep readings with hammer probes; others take readings from 5/8 in. or less. Both styles leave marks. Pinless meters leave no marks but require the wood surface to be smooth; they detect moisture down to about 5/8 in. I looked at a dozen meters priced from $60 to $350 and was surprised to find that their overall accuracy is quite good.

The Delmhorst J-4 is easy to use: Just stick in the pins and push a button. I like the analog dial a great deal, and the instructions are easy to understand. It comes with a slide-rule-type temperature-correction tool. A hammer probe is an accessory.

Fine Woodworking Recommended Products

Stanley Powerlock 16-ft. tape measure

With its smooth lock, tough case, compact size, and excellent accuracy, this Stanley tape is perfect for workshop use.

Buy at Amazon

Jorgensen 6 inch Bar Clamp Set, 4 Pack

Small light-duty clamps are best bought in quantity. These clamps are a great balance of affordability and quality—so stock up!

Buy at Amazon

Rockler Deluxe Panel Clamp

These clamps can handle glue-ups between 10 in. and 36 in. wide, and boards up to 3 in. thick. Sliding feet attach to the lower bars with magnets, letting you position them quickly for stability on any surface. The spring-loaded jaws adjust easily, dropping into notches along the bars. And the powerful clamp handles clear the benchtop.

Buy at Amazon