Advances in technology are allowing for a larger range of measurable thickness, making ultrasonic thickness measurement usable in more applications. Minimums and Specs Minimum Thickness Midcoats must be 7.5 to 10 microns thick. Single coatings on plastics must be 12.5 to 15 microns thick. Top coatings must be 25 to 30 microns thick, to guarantee resolving the next contrasting underlying layer. Typical Gage Specifications Accuracy of 1.3 microns Resolution of 1 micron Maximum thickness measured is approximately 1 millimeter.
Maximum layers measured is five.
Multilayer measurement capability. Measures thin coatings and materials of 25 microns and less. Can measure more parts, in process, than gages using eddy current or magnetic induction. Detects thickness at precise points to identify the defect type e.g., solvent popping, sags and exact location. Gage Accuracy Ultrasonic gages, like any other measurement tool, can be a victim of changes in environment or process parameters.