PCE Instruments PCE-RT 11 Surface roughness tester

Roughness meter for accurate measurement of roughness according to Ra, Rz, Rq and RT / with piezoelectric button / large OLED display with backlight The roughness meter is a portable measuring device for determining the roughness depth according to Ra, Rz, Rq and RT in only one device. The small roughness measuring device has been specially designed for rapid measurement of roughness. Roughness (obsolete also roughness) is a term from surface physics that refers to the unevenness of the surface height. The roughness measuring device works according to the same piezoelectric micro-sensor principle as the highly accurate laboratory measuring instruments. The simple handling of the roughness measuring device as well as the high repeatability distinguishes the device particularly. After pressing a button, the piezoelectric micro-switch on the roughness measuring device scans the surface within a few seconds and then immediately displays the value Ra, Rz, Rq or RT digitally according to the pre-selected limit wave length (cut-off length). RZ = averaged roughness depth The averaged roughness depth Rz is the arithmetic mean of the largest single roughness depths of several adjacent individual measuring distances. RA = arithmetic mean roughness value Ra is the generally accepted and internationally applied roughness parameter. It is the arithmetic mean of the absolute values of the profile deviations within the reference distance. The measured numerical value Ra is always less than the Rz value determined on the same roughness profile. RT = maximum roughness depth RT is the distance between the highest and lowest point of the measuring distance. RQ = square mean Rq is the quadratic mean value of all ordinate values within the single measuring distance. Rq corresponds to the term RMS (Root Mean Square).

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