Ultrasonic thickness gauge specifically designed to measure the thickness of metallic and non-metallic materials e.g. aluminium, titanium, plastics, ceramics, glass and plastics. It can also be used to monitor all types of pipes and pressure vessels for loss of thickness due to corrosion or erosion. The gauge is easy to use and, after a simple calibration to a known thickness or sound velocity, the gauge will give accurate readings to an accuracy of 0.5%. Sound velocities of 11 different materials (Steel, Cast iron, Aluminum, Red copper, Brass, Zinc, Quartz glass, Polyethylene, PVC, Gray cast iron, Nodular cast iron) are pre-set, or choose user-set sound velocity (range 500-9000 m/s).