Ultrasonic Thickness Gage. State of the art, digital ultrasonic thickness Gage is packed with features typically found on high end models only. The 3807 Ultrasonic Thickness Gage offers everything from basic measurement, Thru Coating capabilities, Scanning Capabilities, Adjustable Sound Velocity, extended memory and USB output capabilities. This dynamic ultrasonic thickness gauge is designed to measure the thickness of metallic and non-metallic materials such as steel, aluminum, titanium, plastics, ceramics, glass and other ultrasonic wave conductors with parallel top and bottom surfaces. Accurately displays readings in either inch or millimeter after a simple calibration to a known thickness or sound velocity.