SRT-6210 Digital Surface Roughness Tester 4 Parameters (Ra, Rz, Rq, Rt)

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This multi-parameter tester designed to measure 4 parameters (Ra, Rz, Rq, Rt) using the built-in Diamond pin probe. This tester is widely used in production site to measure surface roughness of various machinery-processed parts and calculate corresponding parameters according to selected measuring conditions and clearly display all measurement parameters in Metric or Imperial. It also have 4 wave filtering methods (RC, PC-RC, GAUSS & D-P) and memorize 7 groups of measurement results & conditions for for use at a later time.


  • Multiple parameter measurement: Ra, Rz, Rq, Rt
  • Highly sophisticated inductance sensor
  • The sensor sliding along the surface by driving the mechanism
  • Four wave filtering methods : RC, PC-RC, GAUSS and D-P
  • Built-in lithium ion rechargeable battery and control circuit with high capacity
  • Small in size, light in weight and easy to use
  • Option to communicate with PC computer for statistics, printing and analyzing via the optional cable and software for RS232C interface (optional, not included in the set)
  • Manual and Auto switch off
  • Memorize 7 groups of measurement results and conditions
  • Metric / Imperial Conversion
  • Exclusive DSP processes to output measurement results on LCD
  • Circuit with high capacity
  • Compatible with four international standards ISO, DIN, ANSI and JIS
  • Applicable in production site, laboratory and workshop in factory
  • Easy operation menu and large LCD display


  • Multiple parameter measurement: Ra, Rz, Rq, Rt
  • Filtering methods: RC, PC-RC, GAUSS and D-P
  • Measuring Range
    • Ra, Rq : 0.005~16.00 um / 0.020~629.9 uinch
    • Rz, Rt :0.020~160.0 um / 0.078~6299uinch
  • Accuracy:<=10%
  • Repeatability: <= 6%
  • Fluctuation of display value: <= 6%
  • Sensor
    • Test Principle: Inductance type
    • Material of Probe Pin: Diamond
    • Radius of Probe Pin: 5µm
    • Dynamo-measurement of Probe: 4mN(0.4gf)
    • Vertical Radius of Guiding Head: 48mm
    • Probe Angle: 90°
  • Maximum driving stroke: 17.5mm / 0.7inch
  • Cutoff Length: 0.25mm / 0.8mm / 2.5mm optional
  • Evaluation length 1-5 cut-off optional
  • Driving speed
    • sampling length = 0.25mm Vt=0.135mm/s
    • sampling length = 0.8mm Vt=0.5mm/s
    • sampling length = 2.5mm Vt=1mm/s
    • returning Vt=1mm/s
  • Resolution:
    • 0.001µm if reading <10µm
    • 0.01µm if 10µm =reading <100µm
    • 0.1µm if reading =100µm
  • Data output: communicate with PC through RS232C interface (optional, not included in set)
  • Store memory: 7 groups of measurement
  • Metric / Imperial Conversion
  • Display: 4 digits, 10mm LCD with blue backlight
  • Power Li-ion battery: rechargeable
  • Operating conditions
    • Temperature: 0~50°C
    • Humidity: <85%
  • Auto & Manual switch off
  • Size: 140 x 57 x 48mm (5.5 x 2.2 x 1.9 inch)
  • Weight: about 420g


Set Includes:

  • 1 x 4 Parameters Digital Surface Roughness Tester
  • 1 x Carrying Case
  • 1 x Standard Sensor
  • 1 x Standard Sample Plate
  • 1 x Operation Manual
  • 1 x Screwdriver
  • 1 x Adjustable Leg
  • 1 x Sensor Protector
  • Power Adapter (choose 1 from these available Adapter for US, UK, Australia and Europe system)


Optional Item (not included in set)
          Please click here to buy this optional item RS-232 Software & Cable
          or you may contact us at sales(at) if you want an optional items to be included in your order

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