One leaves no holes. The other reads at a specific depth.
Verdict
A pinless meter reads through a scanning plate with no damage, which suits finished surfaces and quick checks across a board. A pin meter drives two probes to a known depth, which reads that depth specifically and works on odd shapes a plate cannot sit flat on. Buy pinless for general woodworking; buy pins for construction and thick or irregular stock.
~$60
Check Klein ET140 Pinless Moisture Meter Price| Klein ET140 Pinless Moisture Meter | PEC 12 in Combination Square | |
|---|---|---|
| Damages the surface | No | Yes, two small holes |
| Reads at depth | Averages a zone | At the pin depth |
| Works on irregular shapes | Needs a flat area | Yes |
| Species correction | Usually built in | Usually built in |
| Speed across a board | Very fast | Slower |
| Cost | Moderate | Moderate |
You are checking boards before building with them. Wood moves as it reaches equilibrium with your shop, and building with lumber that has not acclimatised is the most common cause of panels cupping and joints opening a season later.
Check Klein ET140 Pinless Moisture Meter on Amazon
Moisture is only half the story. A board can be at the right moisture content and still be cupped or twisted, and a straight edge tells you that immediately. Check both before milling.
Check PEC 12 in Combination Square on Amazon
Commonly six to eight percent for interior work in a heated home, though it depends on your climate. What matters is that the wood has stabilised at your shop's conditions rather than hitting a specific number.
Weeks rather than days for thick stock, stickered with air moving around every face. Rushing this is why projects made from freshly bought lumber move afterwards.
Yes, considerably, because density changes the electrical properties both meter types rely on. Set the species correction if your meter has one.
Comparison based on published manufacturer specifications and the general consensus of owner reports. We have not tested these units side by side. Confirm current prices and specifications before buying. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.