—— Mr. David Chambers
—— Neil Renato
—— Fermin Lee
—— Dalius Skinulis
—— Sun Chull Kim
Ultrasonic thickness gauge is a widely used nondestructive test technique for measuring the thickness of a material from one side.
It is fast, reliable, and versatile, and unlike a micrometer or caliper it requires access to only one side of the test piece.
The first commercial ultrasonic gauges, using principles derived from sonar, were introduced in the late 1940s. Small, portable instruments optimized for a wide variety of test applications became common in the 1970s.
Later advances in microprocessor technology led to new levels of performance in today's sophisticated, easy-to-use miniature instruments.
1. What can be measured?
Virtually any common engineering material can be measured ultrasonically. Ultrasonic thickness gauges can be set up for metals, plastics, composites, fiberglass, ceramics, and glass. On-line or in-process measurement of extruded plastics and rolled metal is often possible, as is measurement of individual layers or coatings in multilayer fabrications.
Liquid levels and biological samples can also be measured. Ultrasonic gauge is always completely nondestructive, with no cutting or sectioning required.
Materials that are generally not suited for conventional ultrasonic gauge because of their poor transmission of high frequency sound waves include wood, paper, concrete, and foam products.
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