GAOTek High Precision Digital Surface Roughness Tester

GAOTek high-precision roughness instrument using needle drawing method, needle method, also known as touch-pin method.




GAOTek high-precision roughness instrument using needle drawing method, needle method, also known as touch-pin method. When the stylus directly across the measured surface of the workpiece across the light, due to the measured surface profile of the ups and downs, the stylus will be perpendicular to the measured surface in the direction of the surface to produce up and down movement, the movement of the signal through the electronic device Amplified, and then through the instrument or other output device will be related to the roughness of the data or graphics output.



  • Electromechanical integration design, small volume, light weight, easy to use
  • Using DSP chip to control and data processing, high speed, low power consumption
  • Large range, parameters RX, Ra, Rz, Rq, Rt, Rp, Rv, R3z, R3y, RzJIS, Rsk, Rku, Rsm, Rmr
  • 128 x 64 OLED dot matrix display, digital / graphic display; highlight no perspective
  • Display information rich, intuitive, can display all the parameters and graphics
  • Compatible with ISO, DIN, ANSI, JIS national standards
  • Built-in lithium-ion rechargeable battery and a charging control circuit, high capacity, no memory effect
  • Residual quantity indicator icon, prompting the user to charge
  • Display of the charging process instructions, the operator can understand the degree of charge
  • Working time more than 20 hours of continuous work
  • Large capacity data memory, can store 100 groups of original data and waveform
  • Real-time clock settings and display, convenient data recording and storage
  • With automatic dormancy, automatic shutdown and power saving function
  • Reliable control motor to go dead circuit and software design
  • Measurement information display, menu prompt information, false information and switch machine information
  • Full metal shell design, sturdy, compact, portable, high reliability
  • Can be in English freely switch
  • Can be connected to a computer and printer
  • Optional sensor surface, hole sensor, measuring platform, sensor, an extension rod and other accessories


Technical Specifications

Measuring range (um) Ra: 0.005 um to 16.000 umRz: 0.02 um to 160.00 um
Sample length (mm) 0.009 in, 0.03 in, 0.09 in (0.25 mm, 0.8 mm, 2.50 mm)
Evaluation length(mm) 1 L to 5 L
Maximum drive stroke 0.68 in (17.5 mm)
Indication accuracy 0.001
Indication error ≤10%
Variability <6%
Data Storage 100 groups
Power Rechargeable li-battery
Working temperature -4 °F to 104 °F (-20 ℃ to 40 ℃)
Relative humidity <90%
Size 5.51 in x 2.16 in x 1.85 in (140 mm x 55 mm x 47 mm)
Weight of Host 0.88 lb (0.4 kg)


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