Awesome product to add to my tool box.  I'm a realtor and have hired many professional inspectors and only a few actually have tool (more sophisticated than this one) to measure dampness in walls and floor which could be dry to touch, but expose potential problems.  This is a great first line of defense and takes guess work out of diagnosing and repairing water damaged walls/floors (you only have to repair damp areas instead of ripping it all out.).