PCE Instruments PCE-RT 11-ICA Surface roughness tester Calibrated to (ISO standards) 0.05 - 50 µm

The roughness tester is a portable measuring device for determining the roughness by Ra, Rz, Rq and RT in a single device. The small roughness measuring device is especially designed for the fast measurement of roughness. Roughness (also obsolete roughness) is a term from surface physics, which refers to the uneven surface height. The roughness tester work according to the same piezo-electric micro-scanner principle as the highly accurate laboratory measuring devices.

The simple handling of the roughness tester, as well as the high repeatability, is characterized in particular by the device. At the touch of a button, the piezoelectric microfeeler on the roughness measuring device scans the surface within a few seconds and then immediately displays either the value Ra, Rz, Rq or RT according to the pre-selected cut-off length.

Rz = average roughness
The average roughness Rz is the arithmetic mean of the largest single roughing depths of several adjacent individual measuring lines.

Ra = arithmetic mean 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 number value Ra is always less than the Rz value determined on the same roughness profile.

RT = maximum roughing depth
The maximum roughness RT is the distance between the highest and lowest point of the measuring distance.

Rq = Square Center Rough Value
Rq is the square mean value of all ordinate values within the individual measuring distance. Rq is the name RMS (Root Mean Square).

This text is machine translated.