DeFelsko Corp.: The PosiTector 200 uses ultrasound to test the thickness of coatings on concrete. Available with either standard or advanced features, and with a choice of two measuring ranges, it includes extended-range probes, impact-resistant Lexan® display, IP5X ingress protection and protective rubber holster. It conforms to ASTM D6132, SSPC-PA 9 and ISO 2808.