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The roughness tester RT 2000 is used for accurate measurement of surface roughness. The roughness tester can be used on all surfaces. The roughness with the roughness measuring device is precisely recorded via the piezotast head. The roughness tester measures in the ranges Ra, Rq, Rsm, Rsk, Rz, Rt, Rp, Rv, Rc and is therefore a universal roughness tester in quality assurance. 


The roughness tester is simply placed on the surface for measurement. During the measurement process, a probe is pulled over the surface and the roughness tester displays the measured value on the large, OLED display. In addition to the numerical measured value display, the measuring profile can be graphically visualized. The roughness tester RT 2000 is powered by a rechargeable battery. The charger of the surface tester is included in delivery. The roughness tester has an automatic shut-off function for the battery care. 


The surface tester RT 2000 has a Micro USB cable. The measuring device can be charged via this connection. Furthermore, the measurement data can be transmitted from the roughness tester to the software. So it is possible to create a complete documentation of the measurement. 


Rz = average roughness

The average roughness depth Rz is the arithmetic mean of the largest single-order depths of several adjacent individual measurement sections.


Ra = arithmetic mean roughness

Ra is the generally recognized and internationally applied roughness parameter. It is the arithmetic mean of the absolute values ​​of the profile deviations within the reference distance. The measured value Ra is always smaller than the Rz value determined on the same roughness profile.


Rt = maximum roughness

The maximum surface roughness Rt is the distance between the highest and the lowest point of the measuring section.


Rq = Square Mean Roughness

Rq is the root mean square of all ordinate values ​​within the individual measurement distance l. Rq corresponds to the designation RMS (Root Mean Square).

Roughness Tester RT 2000

  • Measurement parameters Ra, Rq, Rsm, Rsk, Rz, Rt, Rp, Rv, Rc
    Measuring ranges Ra, Rq, Rc: 0.005 μm ... 16 μm
    Rz, Rt, Rp, Rv: 0.02 μm ... 200 μm
    Rsm: 5 μm ... 1000 μm
    Rsk: -1 ... 1
    Radius stylus tip 5 μm
    Material stylus tip Diamond, 90° angled
    Max. Recommended force for static measurement 4 mN (0.4 gf)
    Measuring principle Inductive
    Radius longitudinal guide bar 45 mm / 1.8 in
    Maximum driving distance 15 mm / 0.6 in
    Cut-off wavelength (cut off) 0.135 mm / s at cut-off wavelength: 0.25 mm
    0.5 mm / s at cut-off wavelength: 0.8 mm
    1 mm / s at cut-off wavelength: 2.5 mm
    Reversing speed: 1 mm / s
    Measurement accuracy <± 10%
    Repeatability <6%
    Display OLED
    Units μm / μinch (switchable)
    Interface Micro USB
    Power supply Rechargeable Li-ion battery
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