Use Extech’s MO53 Pinless Moisture Meter for non-invasive measurements on wood and other building materials with virtually no surface damage. The depth of measurement is approx <0.75" (20mm). Easy-to-operate with display icons that indicate the levels of moisture content plus audible alert feature. Ideal for building restoration projects and applications where moisture detection on floors, tiles and under carpets is critical. A must-have tool for analyzing the after-effects of water leakage behind walls and in ceilings.