... and reflected back from the other face. The ultrasonic thickness gauge can provide quick and accurate measurement to various work pieces ... production equipment, and monitor the thinning degree during using.Ultrasonic thickness gauge can be widely used in petroleum, chemical, metallurgy, shipping, ... LED backlightMeasuring range:0.75mm~300.0mm (0.03inch~11.8 inch)Sound Velocity Range1000m/s~9999m/s (0. ...