www.pcimag.com/articles/83864-defelsko-coatings-thickness-gage
DeFelsko: Coatings Thickness Gage
October 3, 2000
The PosiTector 100 is a nondestructive, ultrasonic coating thickness gage that has been found suitable for measuring coating thickness on concrete and other nonmetals. It uses an ultrasonic principle to measure coating thickness by emitting a pulse into the coating that is then reflected back from the substrate to the probe.