The Triplett MS150 Measures moisture content in wood (5 to 50%) and other building materials (1.5 to 33%). Use pinless measurement (6 to 99.9%) for non-invasive testing. Low, Medium and High icons indicate moisture level and an audible indicator increases as the moisture level gets higher for quickly scanning large areas. A Lock button freezes measurement on screen for hard to see areas. For Home Inspection, Water Damage Restoration, Lumber Yards, Painting, Paper Mills, Textile, Clothing Manufacturing, and other industries.