A new CTM 20 coating thickness gauge, that uses innovative ultrasonic technology, is available by Krautkramer Branson. The new instrument enables measurements to be made even on coatings and multilayers covering nonmetallic materials. It is possible to measure the total thickness as well as the thicknesses of the individual layers, with the CTM 20. There is also a wall thickness function that enables through-coating measurement of the test part. It is a compact, portable, battery-powered instrument