Surface Roughness Gauge : RTD-200
  • Surface Roughness Gauge : RTD-200
  • Surface Roughness Gauge : RTD-200

Surface Roughness Gauge: RTD-200

• Measures multiple parameters including Ra, Rz, Rq, Rt
• External probe for better access to test internal bores
• USB interface
• DSP chip for high speed data processing

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Surface Roughness Tester RTD-200 is designed for users that have a wide range of surface testing requirements.  

It features multiple parameters and adjustable setting options for thorough testing. Users can also store up to 100 test results including wave form graphs and conversion value to other parameters. These can be reviewed or downoaded for interpretation. 

Commonly utilized to test in a work shop or laboratory, the RTD-200 is used to determine the roughness of surface finishes, both raw and machined.  It is important to measure quality and manage manufacturing processes for consistency and fit for purpose.  If a surface is too rough it can wear out more quickly as it has a higher co-efficient of friction. To make a surface smoother it can be much more expensive so a balance between wear costs and production costs by analysing the data from surface roughness tests.

RTD-200 is also suitable for curved surfaces by having a protruding stylus, and the bright OLED dot matrix screen is easy to read in daylight or low light. The software is used for management of data including graphing of results.


  • • Easy to use
    • Rugged body
    • DSP chip for hi-speed data processing
    • Large range of parameters
    • OLED screen
    • Data output and management
Standard kit includes the main unit, stylus sensor, Ra sample, sample support, height support (adjustable), power adapter, USB cable and software.
Optional styluses are also available for curved surfaces and deep grooves at additional cost.

For any assistance please contact us


Maximum Travel 17.5mm
Indicating Error ±10%
Variation of Indication ±6%
Measured Profile Roughness, Waviness, Contour
Parameter Ra (0.005µm-16µm) Rz (0.02µm-160µm)
Paramater Rq, Rt, Rp, Rv, R3z, R3y, RzJIS, Rsk, Rsu, Rsm,Rmr, Rx
Filter RC, PC-RC, Gauss, ISO13565
Sampling Length "L" 0.25mm, 0.8mm, 2.5mm, 8mm
Evaluation Length (1-5)L
Interface USB
Power Built in rechargeable battery
Detection Principle Current induction
Stylus Force 4mN (0.4gf)
Stylus Angle 90°
Calibration Template  included






RTD-200 manual

Complete user operation manual for RTD-200 Surface Roughness meter

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