The General tools pin type moisture meter with LED bar graph display is perfect for detecting the water content in a variety of materials to help ensure the appropriate level of surface dryness before painting, sealing or treating. Whether you're a professional contractor or a conscientious homeowner, this ultra-sensitive moisture meter helps you easily detect hidden leaks in wood, plaster and carpet. This analog meter provides accurate moisture-level readings and is great for new home inspections, locating roof leaks or even selecting dry lumber at the yard.