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Impact Instruments was established in 2004 as an importer, agent and or distributor for several leading, international brands. Our territory covers South Africa and surrounding SADC countries, where agreements permit. With more than thirty years combined industry experience, we provide technical solutions and believe in not only selling equipment but ensuring that users are product and application trained. We guarantee high quality products and an outstanding level of service at all times. Should you not find what you are looking for, please contact us directly.

Why measure surface roughness - 

"Mechanical Measurement & Metrology - Surface finish"  By Darshan Panchal on Linkedin Slideshare explains it succinctly- 

  Concepts of surface metrology Darshan Panchal

Surface Roughness Gauge


Measuring range Ra: 0.05-10.0μm Rz: 0.1-50μm



  • Pocket-sized and economically priced
  • Uses a high speed microprocessor DSP
  • Uses an OLED screen, bright and without visual angle
  • Data output USB port
  • Large measuring range suitable for most materials
  • Measures flat, outer cylinder and sloping surface
  • Both Ra and Rz parameters in one instrument
  • Works on 3.7V rechargeable lithium battery
  • Real time battery indicator

TMR 120 Roughness

R 15 200.00 Excl.VAT 

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Surface Roughness Gauge


Parameter            Ra(0.005μm ~ 16μm), Rz(0.02μm ~ 160μm), Rq, Rt, Rp, Rv, R3z, R3y, RzJIS, Rsk, Rku, Rsm, Rmr, Rx

Features :  

  • Electromechanical integration design, small volume, light weight, easy to use.
  • Using DSP chip to control and data processing, high speed, low power consumption. 
  • Large range, parameters Ra, Rz, Rq, Rt, Rp, Rv, R3z, R3y, RzJIS, Rsk, Rku, Rsm, Rmr, Rx.
  • 128 x 64 OLED dot matrix display, digital / graphic display, highlight no perspective.
  • Compatible with ISO, DIN, ANSI, JIS national standards.
  • Built-in lithium ion rechargeable battery and a charging control circuit, high capacity, no memory effect.
  • Working time more than 20 hours of continuous work.
  • Large capacity data memory, can store 100 groups of original data and waveform.
  • Real-time clock settings and display, convenient data recording and storage. 
  • With automatic dormancy, automatic shutdown and power saving function.
  • Measurement information display and menu prompt information
  • Full metal shell design, sturdy, compact, portable, high reliability.
  • Optional sensor surface, hole sensor, measuring platform, sensor, an extension rod and other accessories.

tmr 200 alone

R 21 450.00 Excl.VAT 

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