General Tools MMD5NP Non-Invasive Moisture Meter

The General Tools MMD5NP enables moisture measurement of a variety of materials without having to pierce the material's surface. The unit has a range of 0.0 to 99.9% REL (relative) for wood, and 0.0 to 56.5% REL (relative) for building materials. The sensor has a measurement depth of 3/4in (20mm). It sports a jumbo LCD display with intuitive on-screen icons for low/medium/ high moisture content and wood/concrete mode.