Ultrasonic Thickness Gauges provide the ability to measure the thickness of materials in a non destructive manner. The Handheld Ultrasonic Thickness Gauge sends an ultrasonic pulse signal via a transducer at a known sound velocity through the material, and measures the time taken for the signal (echo) to bounce back. The transducer and test surface are coupled using a water-based Couplant Gel and this removes the air gap. Metal thickness and plastic thickness are very common materials tested but almost any material can be tested provided it has a known sound velocity. We offer various options and a full range of accessories and replacement parts.