Due to the vast development of lighter aerospace and rapid increase in usage of composite parts, the need for non-destructive testing has increased since last years. Many traditional non-destructive methods are revaluated for accuracy. Aerospace manufactures and maintainers are replacing technologies for accurate coating thickness measurement on composite structures. Non –destructive technologies monitored coating thickness to identify undercoated base that can lead to early base failure. Over coated base contribute to aircraft weight.

In the aerospace industry, various structural parts such as radomes and wing panels are constructed using fiberglass and advanced composites. It requires correct thickness control. Composites are harder than traditional materials, so weigh less. Sophisticated composites are constructed by joining graphite or carbon fibers with polyimide, epoxy or polyimide resins. It is important to make instant non-destructive thickness measurements on parts like wings, panels, ducts, fan blades and fuselage. While conducting the fabrication process or post installation, the use of ultrasonic thickness gauge is important for controlling quality and right wall thickness.

Olympus Thickness Gauge can be used for composite thickness measurement. Generally, the thickness of many composite materials for aerospace applications ranges from 0.050 in. to 0.750 in. (1.25 to 20 mm) that is measured with many hand-held model of thickness gauges.

Magnamike 8600 is used in case of accessibility to both sides of the test sample for a probe and a target ball. It is based on Hall Effect thickness technology. The Wall Thickness Gauge offers the advantage of couplant-free measurements which is independent of sound velocity variations, and with a correct probe and targets. It measures up to a maximum thickness of 25.4 mm or 1.00 in.


The instrument is a renowned non-destructive thickness gauge and is portable in nature.  Its magnetic technology is used to perform reproducible thickness measurements on nonferrous objects.

Magnamike 8600 is considered to be an appropriate fit for performing composite thickness measurement. The inherited nature of composite materials can deliver changing the degree of anisotropy that leads to modifications in the velocity of sound as well. While testing any composite part, the velocity of sound should be distributed evenly. It should not interfere and disturb the thickness measurement accuracy.

The values that are measured can be seen on the color display screen of the device as digital thickness values. The three probe designs that are available with the device are a right angle, straight and for low profile articulating. The device has replaceable wear caps which is present in standard, chisel tip and extended wear type. The target selection is broadly expanded from -3/16 and ¼ in. in magnetic target balls. The large display screen includes color VGA display quality.