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Home  >>  Products  >>  Surface Profile  >>  Surftest SJ-210 and SJ-310

Surftest SJ-210 / SJ-310 Surface Roughness Testers

The Mitutoyo Surftest® SJ-210 is an advanced portable surface roughness tester and profilometer that combines high accuracy and measurement speed with numerous innovative features creating a new class leader in surface inspection.

The Surftest® SJ-310 is a user-friendly surface roughness tester that has a high-functionality display with an integrated high-speed built-in printer. This model is a transverse type drive unit with a 0.75mN measuring force.

Surftest SJ-210 Surface Roughness Tester

Surftest SJ-310 Surface Roughness Tester


SJ-210 Models
  • 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.
  • Calculation results are displayed in large characters.
  • Up to 10 measurement conditions can be stored in the internal memory. Conditions can be quickly read according to the workpiece.
  • An optional memory card can be used as an extended memory to store large quantities of measured profiles and conditions.
  • 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.
  • Many interface options:
    • A USB interface is equipped as standard.
    • The Surftest SJ-210 also provides an RS-232C output, Digimatic output, printer output, and foot switch input.
  • 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 (λc) and the number of sampling lengths (N) on the measurement screen.
  • The multilingual display interface supports 16 languages, which can be freely switched.
  • Access to features can be password-protected.
  • A quick-charge, long-life battery is provided.
  • 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

  • Large 5.7” color LCD with touch screen improves operability and achieves high visibility.
  • 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. It can also store up to 10 measurement conditions with the built-in memory.
  • 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.
  • Security is managed via a password lock to restrict function changes and unnecessary settings that could cause operation errors.
  • 16 languages can be selected and are switchable.
  • It corresponds to cissoidal calculation in which one measurement can evaluate two different conditions.

Technical Data

Technical Data
Type of Detector
Standard Drive Unit
Retractable Drive Unit Standard Drive Unit
Model No. SJ-210
(0.75mN type)
(4mN type)
(4mN type)
(0.75mN type)
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: λc 0.003,, 0.1” (0.08, 0.25, 0.8, 2.5mm)
λs*5 100, 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 length 0.01 - 63” (.001” interval) (0.3 - 16.0mm: 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: Customization Desired parameters can be selected for calculation and display
GO/NG judgment*7 By max value / 16% / Standard deviation
Storage of Measurement Condition Save the condition at power OFF
Storage Internal 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 available Auto-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) *8 Auto-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
*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.

Detectors & Drive Units

Detector Information
Choice of two Detectors:
Measuring Force: 0.75 mN 4 mN
Stylus Tip: Radius 2 µm Radius 5 µm
Tip Angle: 60° 90°


When the detector stylus makes contact with the workpiece it is indicated by color coding on the display. This is helpful when visibility of the surface to be measured is restricted (e.g. when measuring within a shrouded feature or groove).   There are a wide range of optional detectors available, including detectors for small holes, extra small holes, gear tooth surfaces, and deep grooves.  

Drive Unit Information

Standard Drive Unit
Popular standard drive unit
  Transverse Tracing Drive Unit
Best suited for measurement of narrow, shrouded workpiece features such as crankshaft, EDM parts, etc.
  Retractable Drive Unit
The detector is in the retracted position at rest so it is immune from damage when inserted into a feature whose profile cannot be easily seen, such as a blind hole, etc.

SurtTest Video




Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices
SU-178-561-01A Surftest SJ-210, Standard Drive Unit, 0.75 mN $2,602.95
SU-178-561-02A Surftest SJ-210, Standard Drive Unit, 4 mN 2,602.95
SU-178-563-02A Surftest SJ-210, Retractable Drive Unit, 4 mN 2,934.75
SU-178-571-01A Surftest SJ-310, Standard Drive Unit, 0.75mn 4,465.65
Standard Accessories (Included with SJ-310 Only)
SU-178-390 Standard detector, 0.75 mn 488.25
SU-270732 Printer Paper, 5 rolls 60.90
Optional Accessories (SJ-210/SJ-310 Series)
SU-178-392 Small hole detector (Ø4.5mm) 746.55
SU-12AAA233 Height gage adapter (inch type) 109.20
Retractable and traverse (side to side) detector models also available. Call for pricing.


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