Professional roughness measuring device with various probes for different applications to measure up to 11 roughness parameters

SRTPro Plus

The Split-TYPE roughness tester SRT Pro Plus is a high-precision instrument for measuring surface roughness. It is suitable for determining the roughness of a variety of machined parts, including flat, inclined, and external cylindrical surfaces, as well as curved surfaces, small holes, and grooves.

The various probes are suitable for both metal and non-metal parts, especially for machined parts in the manufacturing industry. It is frequently used for measuring the roughness of small workpieces and for on-site inspection of large workpieces. This device is ideal for testing, quality control, and final inspections in various departments.

Properties

  • Measurement type: The measurement unit can either be integrated directly into the main device or operated separately with a connecting cable.
  • Measurement range:
    - Y-axis: 320 μm (−160 μm to +160 μm)
    - X-axis: 17.5 mm
  • Data storage: Capacity for 100 measurements.
  • Display: Large, easy-to-read 3.5-inch TFT display (480 × 320 pixels) with wide viewing angle. Displays numerous pieces of information such as battery status, device status, stylus position, measurement settings, and more.
  • Interfaces: Bluetooth connectivity to printers or Android devices. PC software for transferring measurement data to a PC or laptop via the supplied cable.
  • Real-time waveform: Synchronized display of the measurement curve during acquisition.
  • Standard sensor: axis type sensor – suitable for approximately 90% of all applications.
  • Processor: DSP chip with high processing speed and low power consumption.
  • Optional accessories: Curved sensor, sensor for very small holes, measuring stand, extension rod, printer, etc.

Measurement principle

During the measurement process, the sensor is moved linearly along the probing path. The probe follows the profile of the probing path and moves up and down. These movements are converted into electrical signals, which are then amplified, filtered, and converted into digital values using an A/D converter. Based on these values, a mathematical representation of the profile is created using a microprocessor. Based on this representation, the Ra and Rz values (or Rq and Rt values) are then calculated according to the relevant standards and displayed on the screen.

Standard delivery scope
  • Device SRTPro Plus
  • Standard axis probe
  • Roughness standard Ra
  • 4-foot height adapter
  • 1 m extension cable for external operation
  • Touch pen
  • Charger
  • Data cable and software
  • Operating manual
  • Carrying case
Special accessories
  • Additional test stylus for special applications
  • Portable Bluetooth Printer
  • Measuring Stand
Specifications
Roughness ParametersRa, Rz, Rq, Rt, Rc, Rp, Rv, R3z, R3y, Rz(JIS), Ry, Rs, Rsk, Rku, Rmax, Rsm, Rmr, Rpc, Rk, Rpk, Rvk, Mr1, Mr2
µm/µinch switchable
Measuring RangeRa, Rq: 0.005 - 32 µm
Rz, R3z, Ry, Rt, Rp, Rv: 0.02 - 320 µm
Rs, Rsm: 0.02 - 1,000 µm
Rsk, Rmr: 0 - 100 %
Resolution (depending on range)0.002 µm (range ±20 µm)
0.004 µm (range ±40 µm)
0.008 µm (range ±80 µm)
0.02 µm (range ±160 µm)
Measuring Range Y-axis (vertical)320 µm (−160 µm to +160 µm)
Measuring Range X-axis (horizontal)17.5 mm
StandardISO4287, ANSI b46.1, DIN4768, JISb601
GraphicPrimary profile, Roughness profile, load curves
FilterRC, PC-RC, Gauss, D-P
Cut-off Wavelength0.25 mm / 0.8 mm / 2.5 mm
Traversing Length LnLn = lr × n, n = 1 - 5
PrincipleDifferential Inductance
Stylus tipNatural Diamond, cone angle 90°, tip radius 5 µm
Force / Skid forceMeasuring force: 4 mN, Skid force: less than 400 mN
Skidhard alloy, skid radius 40 mm
Measuring speedlr=0.25: Vt=0.135 mm/s
lr=0.8: Vt=0.5 mm/s
lr=2.5: Vt=1 mm/s
Return: Vt=1 mm/s
Tolerance±(5nm + 0.1A); A: Ra of calibration test block
Repeatabilityno more than 3%
Residual profileno more than 0.010 µm
Power SupplyBuilt-in 3.7V/3000mAh Lithium-ion battery; Charger: DC5V, 800mA / 3 hours
Dimensions Display unit (L x W x H)158 x 55 x 52 mm
Dimensions Drive unit (L x W x H)115 x 23 x 27 mm
WeightAbout 500 g (Display unit + Drive unit + Sensor)
Working EnvironmentTemperature: -20°C to +40°C, Humidity: < 90% RH
Storage and TransportationTemperature: -40°C to +60°C, Humidity: < 90% RH

All SaluTron® measuring devices comply with national (DIN) and international (ISO, BS, ASTM) standards and carry the CE mark.
Subject to technical changes.

Request a quote or further information here!

Areas of application of roughness testers

  • Automotive industry
  • Aerospace industry
  • Mechanical engineering
  • Medical technology
  • Electronics industry

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