LR310  Surface Roughness Tester


Surface Roughness Tester LR310 is a high accuracy instrument for measuring surface roughness. It can be used on variety of machining parts and operates on various surfaces, not only flat but also outer cone, outer cylinder, curved, pinholes, grooves, recesses grooves and axle etc.

The LR310 allows surface roughness measurement both on metal and non-metal workpieces. especially for measurement on large and heavy workpiece, assembly line, on site. It is suitable for machining and manufacturing, quality control, inspection departments.

The LR310 is a Non Destructive Testing instrument, damage won’t caused to testing piece.

LR310  Surface Roughness Tester


  • Mechatronics and ergonomics design, small size, light weight, easy to operation
  • The stylus drive unit can be stored within the main unit for standard measurement, or separated from the display unit by using the supplied cable which allows more flexible measurement in any orientation. The driver can be separated and reattached in one simple step
  • 5 inches color graphic LCDtouch screen, WYSIWYG, it includes a backlight for visibility in dark environments
  • It displays all parameterand graphic
  • The LR310 can be operated usingthe buttons or the touch screen
  • Measurement range up to 320μm
  • Large internal memory: 100 item of raw data and curves can be stored
  • The LR310provides Bluetooth Capability , support wireless connection with printer
  • Built-in lithium-ion rechargeable battery and controlling circuit, high capacity, no memory effect
  • There is remaining charge indicator, charging hint
  • It works over 50 hours while fully charged.
  • Language: Chinese and English
  • DSP chip control and data processing, high speed, low power consumption
  • Real-time clock setting and display for easy data recording and storage
  • With auto sleep, auto power off, power-saving features
  • Reliable circuit and software design to preventing the motor stuck
  • All parameters or any of the parameters which set by users can be printedLR310  Surface Roughness Tester


    Measuring rangThe Z axis (vertical)320µm (-160µm~160µm) , 12600μin (-6300μin~+6300μin)
    The X axis (Transverse)17.5mm(0.69 inch)
    Resolutionthe Z axis (vertical)0.002μm/±20μm,  0.004μm/±40μm

    0.008μm/±80μm,  0.02μm/±160μm



    Ra Rz Rq Rt Rc Rp Rv R3z R3y Rz(JIS) Ry Rs Rsk Rku Rmax Rsm

    Rmr RPc Rk Rpk Rvk Mr1 Mr2

    GraphicRmr curve, Roughness curve, Primary Profile
    The sampling length(lr)0.25, 0.8, 2.5mm
    Assessment length(ln)Ln= lr×n    n=1~5
    SensorMeasuring principleInductance
    Stylus tipDiamond, 90 cone angle, 5μmR
    ForceMeasuring force<4mN, Skid force<400mN
    Probe headhard alloy, skid radius of curvature: 40mm
    Traversing speedlr=0.25,   Vt=0.135mm/s           lr=0.8,    Vt=0. 5mm/s
    lr=2. 5,    Vt=1mm/s              Return      Vt=1mm/s
    ToleranceNot more than ±(5nm+10%A)   A stands for the standard specimen RA value( tolerance not more±10% )
    Residual ProfileNot more than 0.010μm
    Repeatabilitynot more than 3%
    Power supplyBuilt-in Lithium ion battery 3200mAh,  Charger :DC5V
    Outline dimensionMain unit: 158×55×52mm   drive unit: 23×27×115mm
    Weight(main unit)Around 380g
    Zoom of height adapter40mm
    working EnvironmentTemperature: – 20℃ ~ 40℃

    Humidity: < 90% RH

    Store and TransportationTemperature: – 40℃ ~ 60℃

    Humidity: < 90% RH

    standardsISO4287, ANSI B46.1, DIN4768, JIS B601
    Optional accessoryMagnetic Base,  height gauge adapter, curved sensor, small hole sensor, deep groove sensor, pinhole sensor, Extending Rod, Right Angle Rod, mini printer, 200mm platform, 300mm marble platform, software, mobile APP

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