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 Wagner MMC 205 meter has nearly all of the features found on the MMC210 except for a separate button for inputting the species code. It’s accurate, easy to use, compact, and ruggedly built.

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