Ultrasonic Thickness Gauges with A & B Scan and Thru Coating Capability! Features. Utilizing color waveform A-scan and time based B-scan for absolute correctness, this new state of the art ultrasonic thickness gauge is packed with useful features allowing users to be confident of the displayed values on the most critical of applications. This multi-functional ultrasonic thickness gauge offers everything from basic measurement, Scan mode with Min/Max viewing, GO/NO GO display, Adjustable Sound Velocity and Thru-Coating Capabilities. This dynamic ultrasonic thickness gauge is designed to measure the thickness of metallic and non-metallic materials in critical situations that ordinary thickness gauges couldn’t do. The UTG-4000 ultrasonic thickness gauge will accurately display readings in either inch or millimeter after a simple calibration to a known thickness or sound velocity.