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Surftest Surface Roughness Testers

Article No. 13127

Surftest SJ-210, Std Drive Unit, 0.75mN

The Mitutoyo Surftest® Surface Roughness Testers are both portable and highly versatile. They deliver accurate measurements at high speeds. Available in two models, handheld SJ-210 and the SJ-310 which is equipped with extensive measurment and analysis features. Both of these surface roughness testers are user-friendly and are full of capabilities that can enhance productivity.

Select your model

$3,196.00 excl. taxes & shipping cost


  • Enhanced measurement efficiency
  • Fully automatic, high-resolution measurement
  • High-speed positioning
  • Simultaneous measurement of surface roughness and contour
  • 16 languages can be selected and are switchable
  • Highly functional detectors and drive units
  • Calculation results are displayed in large characters.
  • A quick-charge, long-life battery is provided.
  • Up to 10 measurement conditions can be stored in the internal memory. Conditions can be quickly read according to the workpiece.
  • Security is managed via a password lock to restrict function changes and unnecessary settings that could cause operation errors.
  • Many interface options: A USB interface is equipped as standard, and an RS-232C output, Digimatic output, printer output, and foot switch input.
  • An alarm warns you when the cumulative measurement distance exceeds a preset limit. This feature can be used to prevent problems that would be caused by worn out styli. Any value can be specified as the limit.
  • An optional memory card can be used as an extended memory to store large quantities of measured profiles and conditions.
  • Surface Roughness Testing Models
    • SJ-210 Models
      • Designed as a handheld tool that can be carried with you and used on-site.
      • The highly visible 2.4-inch color graphic LCD with backlight lets you view the screen easily even in dark environments.
      • Assessed profiles, load curves, and amplitude distribution curves can be displayed in addition to calculation results. Assessed profiles can also be zoomed up and down.
      • Pass/fail results are displayed in color.
      • The display mode can be easily switched between portrait and landscape.
      • Displayed settings can be easily changed by pressing the left and right arrow keys under the sliding cover. For example, these keys can be used to switch the cut-off value (?c) and the number of sampling lengths (N) on the measurement screen.
      • The required parameters can be selected from the screen. The sub-menu also lets you specify detailed settings such as the tolerance. After completing measurement, the parameters can be changed and calculation can be executed again* using the new parameters. (*May not be possible, depending on the measurement conditions.)
    • SJ-310 Models
      • Compact, portable, easy-to-use surface roughness measurement instrument.
      • Large 5.7” color LCD with touch screen improves operability and achieves high visibility.
      • The integrated high-speed printer offers the user the ability to perform the entire measuring and printing process with the push of a single button (START button).
      • Statistic measurements up to 3 parameters of 300 samples can be performed showing average, standard deviation, max, min, pass rate and histogram.
      • Up to ten measurement conditions along with stored data can be displayed and printed out by the built-in thermal printer.
      • The SJ-310 supports a micro-SD card (optional) for storage of up to 10,000 measurement values, 500 measuring conditions, 1000 measuring data, 500 image (BMP) data, 500 statistic data or auto save up to the last 10 sets of measurement data.
      • The total measurement and sectional measurement results can be displayed as well as the evaluation curve, BAC/ADC curve.
      • It corresponds to cissoidal calculation in which one measurement can evaluate two different conditions.

Technical Attributes

  • Data
    Type of DetectorStandard Drive UnitRetractable Drive UnitStandard Drive Unit
    Part No.:13127131281312913130
    X axis:63” (16.0 mm)
    Z axis (Detector)Range:14400 µin (-7900 µin to +6300 µin) [360 µm (-200 µm to +160 µm)]
    Range/Resolution:14400 µin / .8 µin (360 µm / 0.02 µm)
    4000 µin / .2 µin (100 µm / 0.006 µm)
    1000 µn / .08 µin (25 µm / 0.002 µm)
    Measuring Speed:Measuring 0.01, 0.02, 0.03 in/s (0.25mm/s, 0.5mm/s, 0.75mm/s) Returning 1 mm/s
    Measure Force/Stylus Tip:0.75 mN type: 0.75mN/2μuR 60°, 4mN type: 4mN / 5μmR 90°
    Skid Force:Less than 400mN
    Applicable Standards:JIS '82 / JIS '94 / JIS '01 / ISO '97 / ANSI / VDA
    Assessed Profiles:Primary profile / Roughness profile / DF profile / Roughness profile-Motif
    Evaluation Parameters:Ra, Rc, Ry, Rz, Rq, Rt, Rmax*1, Rp, Rv, R3z, Rsk, Rku, RPc, Rsm, Rz1max*2, S, HSC, RzJIS*3, Rppi, RΔa, RΔq, Rir, Rmr, Rmr(c), Roc, Rk, Rpk, Rvk, Mr1, Mr2, A1, A2, Vo, Rpm, tp, Htp*4, R, Rx, AR, Possible Customize
    Analysis Graphs:Bearing area curve / Amplitude distribution curve
    Filters:Gaussian, 2CR75, PC75
    Cut Off Length:λc0.003,, 0.1” (0.08, 0.25, 0.8, 2.5mm)
    λs*5100, 300μin (2.5, 8μm)
    Sampling Length:0.003, 0.01, 0.03, 1” (0.08, 0.25, 0.8, 2.5mm)
    Number of Sampling Lengths: (xn)x1, x2, x3, x4, x5, x6, x7, x8, x9, x10,
    Arbitrary .0118 ~ .22"(.0001" Interval) [(0.3 ~ 5.6mm: 0.01mm Interval)]
    LCD Dimensions:1.45 x 1.93” (36.7 x 48.9 mm)4.64" x 3.47" (117.8 x 88.2 mm)
    Display Languages:Japanese, English, German, French, Italian, Spanish, Portuguese, Korean Traditional Chinese, Simplified Chinese, Czech, Polish, Hungarian, Turkish, Swedish, Dutch
    Measurement Result Display:Vertical display: 1 parameter / 3 parameter / trace to measurements
    Horizontal display: 1 parameter / 4 parameter / trace to measurements
    (Horizontal display is invertable)
    1-parameter display: one parameter measurement result 4-parameter display: four parameter measurement results Profile display: one parameter measurement result and the measured profile Trace display: The ten latest measurement results using the same parameter
    Printing function*6: (Dedicated printer is required separately)Measurement conditions / Calculation results / Calculation results for each sampling length / Assessed profile / Bearing area curve / Amplitude distribution curve / Environment setting information
    External I/O:USB I/F, Digimatic Output, Printer Output, RS-232C I/F, Foot SW 1/F
    Functions:CustomizationDesired parameters can be selected for calculation and display
    GO/NG judgment*7By max value / 16% / Standard deviation
    Storage of Measurement ConditionSave the condition at power OFF
    StorageInternal memory: Measurement condition (10 sets), Measured profile (1 set), Memory card (Option): 500 measurement conditions, 10000 measured profiles, 500 display images, Text file (Measurement conditions / Measured profile / Assessed profile /
    Bearing area curve / Amplitude distribution curve)
    Calibration:Auto-calibration with the entry of numerical value / Average calibration with multiple measurement (Max 5 time) is availableAuto-calibration with the entry of numerical value / Average calibration with multiple measurement (Max 12 time) is available
    Power-Saving Function:Auto-sleep off function (10-600sec) *8Auto-sleep function (30-600 sec)
    Power Supply:Two-way power supply: baqttery (rechargeable Ni-MH battery) and AC adapter
    *Charging time: about 4 hours (may vary due to ambient temperature)
    *Endurace: about 1000 measurements (differs slightly due to use conditions / environment)
    Two-way power supply: battery (rechargeable Ni-MH battery) and AC adapter Note 1: Charging time: about 4 hours (may vary due to ambient temperature) Note 2: Endurance: about 1500 measurements (differs slightly due to use conditions /environment)
    W x D x H
    Display Unit:2.05 x 2.6” x 6.3” (52.1 c 65.8 x 160mm)10.8" x 4.3" x 7.8" (275 × 109 × 198 mm)
    Drive Unit:4.5 x .9 x 1.02” (115 x 23 x 26mm)4.5"x 0.9" x 8.9" (115 × 23 × 26.7 mm)
    Mass:About 1.1 lbs. (500 g) (Display unit + Drive unit + Standard detector)About 3.9 lbs. (1.8 kg) (Display unit + Drive unit + Standard detector
    Standard Detector
    Measuring Force:0.75 mN4 mN
    Stylus Tip:Radius 2 µmRadius 5 µm
    Tip Angle:60°90°
    *1 Calculation is available only when selecting the VDA, ANSI, or JIS '82 standard.
    *2 Calculation is available only when selecting the ISO '97 standard.
    *3 Calculation is available only when selecting the JIS '01 standard.
    *4 Calculation is available only when selecting the ANSI standard.
    *5 Not available when selecting the JIS '82 standard.
    *6 Order the SJ-210 printer (178-421, optional accessory) separately. See page 19 for details about the SJ-210 printer.
    *7 Standard deviation only can be selected in ANSI. 16 % rule cannot be selected in VDA.
    *8 Auto-sleep function is invalid when AC adaptor is used.


JIS (JIS-B0601-2001, JIS-B0601-1994, JIS B0601-1982), VDA, ISO- 1997, and ANSI 

Delivery Content

SJ-210 - Connecting cable, Roughness specimen Ra (3 µm), Carrying case, Calibration stage Protective sheets for display, AC Adapter, Operation manual, Quick reference manual, Warranty

SJ-310 - Connecting cable, Roughness reference specimen (Ra3 µm), AC adapter, Nosepiece for plane surface, Nosepiece for cylinder, Supporting leg, Calibration stage Stylus pen, Protection sheet, Printer paper (5 pieces), Carrying case Philips screwdriver, Strap for stylus pen, Operation manual, Quick reference manual, Warranty


Height Gage Adapter [Inchtype]
Detector Std Stylus Tip Radius 5 Micron
Small Hole Detector 4.5mm
Printer Paper 5 Rolls For Sj301
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