The Elcometer 108 Hydraulic Adhesion Tester is an extremely versatile Type III adhesion gauge which can be used for many adhesion requirements. Adhesion tests can be made on flat or curved (concave and convex) surfaces. The Elcometer 108 adhesion tester is the ideal gauge for testing coatings on tanks, pipelines, etc. The Elcometer 108 adhesion tester can be used with convex and concave dollies, making this the gauge for adhesion of coatings on all pipelines including those with small diameter, tanks and other curved surfaces. There is a wide range of curved dollies available, each designed for a specific range of curvature.