Ultrasound thickness gauges:

Ultrasound thickness gauges are advantageous in many ways. They can be used to measure the thickness of the wide range of materials. Non ferrous, non-metallic and even corroded materials can be measured with the thickness gauges that use the ultrasonic waves for measuring the thickness. They use the transducers for measurement purposes. The working concept of these gauges is simple and easy. They send the ultrasound waves through the material when activated. Then you need to start using the instrument on any side of the material. Unlike the other testers, these need not be used on both the sides of the materials.

These ultrasound thickness gauges actually start measuring the amount of time taken by the sound waves to reach the end of the back of the sample material. You can find two types of transducers used, and one of them does not require use of the liquid copulant. They are easy to use and even the novice operators find them hassle free to use. They are available in various models and makes and can be got from the online stores for fair prices. You can find them working for various metals, and even material specific devices can be chosen.