The Emveco 210-R Smoothness Tester is a stylus type profiling instrument designed for use on flat flexible materials such as paper, box board, plastic sheets and films. Profiles are generated by a very light stylus tip riding within the floating reference head, as per TAPPI Test Method T575. This stylus contacts the moving surface and follows the contours while at the same time generating vertical position readings at pre-determined intervals. These position readings are then stored and processed by the computer for display and printout. Readings at intervals of 0.0005 inch are possible. A drive system is used to advance the samples beneath the floating reference head.