Mitutoyo SJ-201 surface roughness tester is a portable surface roughness tester with a large easy-to-read LCD display, a wide 350µm (-200µm to +150µm) measurement range, ISO, DIN, ANSI and JIS compatible roughness parameters, 19 analysis parameters including the basic Ra, Rq, Rz and Ry parameters, a custom function to hide unnecessary parameters, GO/NG judgment on a desired parameter, auto-calibration for simple gain-adjustment, auto-sleep function, 10 measurement data is retained in memory even after power is turned off, data output is available for SPC operation, RS-232C interface enables data transfer to computer or other devices using an external device, 2-way power system (AC adapter/rechargeable built-in battery).