The Rapid RH humidity probe decreases the time needed to measure moisture in concrete floors by combining a sensor, power supply, and display in a device that is inserted into a concrete slab. This small, rugged, low-cost instrument allows flooring pros and inspectors to quickly get accurate floor moisture and temperature readings. Installation is easy. With the push of a button the liquid crystal display gives accurate relative humidity and temperature readings. Wagner Electronics, 800-585-7609, .