General Tools MMD7NP Moisture Meter, Pinless, Digital LCD with Tricolor Bar Graph Price: $64.99 (as of 05/02/2023 18:02 PST- Details)

Moisture detector is non-invasive, non-marring and is ideal for detecting moisture under finished surfaces; Auto power off: After 2 minutes of inactivity
The water leak detector has separate settings for drywall, masonry, softwoods and hardwoods
Moisture detection tool has a 3/4-Inch (20mm) maximum sensing depth and Plus /-4-Percent accuracy on wood