The Mitutoyo Surftest SJ-411, 178-581-01A has a 0.75mN Measuring Force & 25mm Evaluation Range. This Series of Surface Roughness Testers feature the ability to do both skidded and skid-less measurements. Equipped with 46 roughness parameters that conform to the latest ISO, DIN, ANSI and JIS standards. These have a wide-range, high-resolution detector and a drive unit that provide superior high-accuracy measurement in its class. By using the skid-less measurement function you can obtain ultra-fine steps, straightness and waviness. Also has a handheld data processing unit and a 5.7 inch color graphic LCD touch-panel providing superior readability as well as visibility in dark environments due to the back light. The user interface provides intuitive and easy-to-understand operations. Features Data Output to a PC with the optional RS-232C or USB cable. Includes GO/NG function, Auto-Calibration function, 16 language support, password protection and optional attachments for mounting on a column stand are available.