Contact Us
TEL: 86-010-82675282
Fax: 86-010-82675633
Address: Floor 2, Building C, No. 3 courtyard, Jinbangyuan North Street, Xisanqi, Changping District, Beijing 100096, PR CHINA
Home > Knowledge > Content
What is a surface roughness Tester?
Jan 09, 2018


       Surface roughness Tester, also known as surface roughness instrument, surface finish instrument, surface roughness meter, roughness measuring instrument, roughness tester and many other names. It has the advantages of high measurement accuracy, wide measurement range, easy operation, easy to carry and stable working. It can be widely used in the detection of various metal and nonmetal processing surfaces. The instrument is a pocket-sized instrument integrated with sensor host, Handheld features, more suitable for use in the production site. Shape aluminum mold design, durable, anti-electromagnetic interference significantly, in line with the new trend of today's design.

Surface roughness Tester Physical picture

Working Principle

       Needle stroke method, also known as stylus method, when measuring the surface roughness of the workpiece, the sensor is placed on the workpiece measuring table Surface, and then start the instrument for measurement, driven by the precision of the instrument's internal drive mechanism Device along the measured surface to do a constant speed linear taxiway, the sensor through the built-in sharp stylus feel measured Surface roughness, the workpiece surface roughness measured at this time will cause stylus displacement, the Displacement causes the inductance of the sensor coil inductance changes, which in the phase-sensitive detector output End produces an analog signal proportional to the measured surface roughness, the signal after amplification and level After conversion into the data acquisition system, DSP chip digital acquisition and data filtering Parameter calculation, the measurement results are given on the display, but also can be output on the printer, you can Communicate with the PC.

Application areas

Surface roughness Tester applications are:

1.machining manufacturing, mainly metal manufacturing

Roughness instrument was originally produced in order to detect the surface roughness of machined parts born. In particular, stylus roughness measuring instrument is more suitable for the detection of relatively hard texture of the metal surface. Such as: auto parts manufacturing, machinery parts and components manufacturing and so on. As long as these processing and manufacturing industries related to the quality of the surface of the workpiece, the detection of roughness instrument is essential.

2.non-metallic processing and manufacturing

With the progress and development of science and technology, more and more new materials are applied to the processing technology, such as ceramics, plastics, polyethylene, etc. Some of the existing bearings are made of special ceramic materials, Made of polyethylene material. These materials are hard, some applications can replace metal materials for the production of parts, in the production and processing process also need to test the surface roughness.

3.With the continuous improvement and improvement of the technology and functions of roughness gauges, as well as in-depth promotion and application, more and more industries are found to be in need of roughness testing. In addition to mechanical processing and manufacturing, electricity, communications, electronics, Switch on the coupling, semiconductor and other semiconductor manufacturing process also need to assess the roughness, and even people's lives in the use of stationery, tableware, human tooth surface to be used to test the surface roughness.


  • Mechatronics design, small size, light weight, easy to use;

  • Using DSP chip control and data processing, speed, low power consumption;

  • The parameters Ra, Rz, Rq, Rt, Rp, Rv, R3z, R3y, Rz (JIS), Rs, Rsk, Rsm, Rku, Rmr;

  • Ry (JIS) = Rz; Rmax = Rt.

  • High-end machines increase RPc, Rk, Rpk, Rvk, Mr1, Mr2 and other parameters;

  • 160μm large-scale measurement range.

  • 128 × 64 OLED dot matrix display, digital / graphic display; highlight non-viewing angle;

  • Display information is rich and intuitive, can display all the parameters and graphics;

  • Compatible with ISO, DIN, ANSI, JIS multiple national standards;

  • Built-in lithium-ion rechargeable battery and charge control circuit, high capacity, no memory effect;

  • Remaining battery indicator icon, prompts the user to charge in time;

  • Can display the charging process instructions, the operator can keep abreast of the degree of charge

  • Continuous working time is more than 20 hours

  • Large capacity data storage, can store 100 sets of raw data and waveforms.

  • Real-time clock settings and display for easy data recording and storage.

  • With automatic sleep, automatic shutdown and other power-saving features

  • Reliable anti-motor walk the dead circuit and software design

  • Display measurement information, menu prompts, error messages and switch tips

  • Ming information

  • Ergonomic housing design, sturdy, compact, portable, high reliability.

  • Chinese / English language choice;

  • Can connect computer and printer;


1.Sensor handling

During installation, hold the main body of the probe by hand, insert the probe into the sensor connection sleeve on the bottom of the instrument, and push gently to the end. When disassembling, gently pull out the sensor body part of the sensor or the root of the protective sleeve by hand.

Note: 1) The stylus of the sensor is the key part of the instrument, which should be given high priority.

          2) In the process of loading and unloading the sensor, special care should be taken not to touch the stylus to avoid damage and affect the measurement.

Surface roughness Tester Physical picture 1

Surface roughness Tester Physical picture 2

2.Preparation before measurement

Boot check battery voltage is normal;

Wipe the workpiece surface to be measured;

The instrument correctly, smoothly and reliably placed on the workpiece surface to be measured;

The glide path of the sensor must be perpendicular to the machined texture direction of the workpiece surface under test.

After pressing the key for about 2 seconds, the instrument will turn on automatically. After powering on, the instrument model, name and manufacturer information will be displayed, and then enter the main display of the basic measurement status.

Surface roughness Tester Boot display

3.Check the stylus position

First, use the stylus position to determine the position of the sensor. Try to make the stylus in the middle of the measurement.

Surface roughness Tester Physical picture 5

4.Start the measurement

In the state of the main interface, press the start measurement key START to start measuring ...

Surface roughness testing

5.Measurement is finished

Show measurement results, click Ra to see other measurement parameters and graphs.

 Roughness measurement results

Surface roughness Tester Physical picture 8

Roughness waveforms

Roughness waveforms 2

Previous: Ultrasonic flowmeter Small size, light weight, easy to carry

Next: Application of magnetic detection