Controls Group Standard Rotational Viscometer Standard Rotational Viscometer
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Standard Rotational Viscometer

  • Download:
ASTM D2196 | ASTM D4402 | AASHTO T316 | EN 13302
Main features
  • Data displayed: selected speed, selected spindle, viscosity reading, percentuage of full scale
  • Relative and absolute viscosity
  • Unit converter SI to CGS
  • AUTO_TEST with sound and visual mulfunction alarm
  • AUTO-RANGE function
  • User-enabled calibration
  • 10 languages options
  • Repeteability: 0.2%
  • Accuracy 0,1% of full scale

General description
General description
Apparent viscosity of unfilled asphalt is evaluated by a rotational viscometer  which measures the torque generated by a calibrated spindle rotating at a selected speed into a bitumen sample heated at  precise temperature in the range between ambient temperature to 260° C. The measured relative resistance to rotation is converted, by a factor,  in viscosity units,  cP or mPa.s. 

Rotary viscometer matches ASTM D2196, ASTM D4402 and AASTHO T316 requirements.
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Technical specifications

  • Viscosity  range (cP):  100 – 13.000.000
  • Rotational speed range (r.p.m.): 0.3 – 100
  • Selectable speeds: 18
  • Precision: +/- 1% fs
  • Resolution:
    • Using low viscosity adapter: 0.01
    • For lower than 10.000 viscosity cP: 0.1
    • For viscosity equal to or above 10.000 cP: 1
  • Repeteability: 0.2%

  Viscosity ranges (mPa•s)
Spindle models  
TR8 50 – 170 K
TR9 250 – 830 K
TR10 500 – 1.7 M
TR11 1 K – 3.3 M

Ordering info

81 – PV0118/C
Rotational viscometer supplied with stand, boss head, spindle protection, spindle rack, power supply cable.
100-240V, 50-60 Hz, 1Ph

see accessories


The temperature control unit consist of a heating chamber that is used to work  in conjunction with rotary viscometers at high temperatures.  Viscosity of solid road unfilled asphalts has to be measured at  temperatures ranging from 34°C to 260° according to the Specifications of ASTM D4402. The heater contains the container with sample  in which a suitable spindle is immersed and driven by the rotary viscometer to measure viscosity. A digital microprocessor control unit grants the required accuracy of test temperature.

Temperature control unit  with temperature range from ambient plus 5°C to 300°C.
220-240V, 50-60Hz, 1 ph

As above but 110V, 50-60Hz, 1 ph

Aluminium disposable test chamber

Stainless steel reusable test chamber

Set of 4 stainless steel spindles. (TR8, TR9, TR10, TR11)