Controls Group High Performance Rotational Viscometer High Performance Rotational Viscometer

High Performance Rotational Viscometer

ASTM D2196 | ASTM D4402 | AASHTO T316 | EN 13302
Main features
  • Touch key board 12 keys
  • Direct redout on a graphic display
  • Data displayed:
    • Selected speed
    • Selected spindle
    • Viscosity reading
    • Percentage of full scale
    • Sample temperature
    • Shear rate (with coaxial spindles)
    • Shear stress (with coaxial spindles)
    • Density (introduced by user)
    • Step program status
    • Analyze and visual characteristics (flow curves)
  • Viscosity reading: dynamic viscosity (cP or mPa•s) or kinematics viscosity (cSt)
  • Program features:
    • Time to torque: target torque pre-setting device
    • Time to stop: target time pre-setting device
    • 10 working memories
    • Customizable options
    • Programmable
    • Multistep
    • Ramp
  • AUTO-TEST with visual and sound malfunction alarm
  • AUTO-RANGE function
  • Temperature reading
  • User enable viscosity and temperature calibration
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 requirements.
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Technical specifications

  • Viscosity  range (cP): 100 – 40.000.000
  • Rotational speed range (r.p.m.): 0.01 – 250
  • Selectable speeds: 2600
  • Resolution:
    • With 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%
  • Thermometer features:
    • temperature margins: 0 °C to 100 °C; 32 °F to 212.0 °F
  • Resolution: 0.1 °C/0.1722 °F
  • Precision: +/-1 °C

Ordering info

Rotational viscometer is supplied with stand, boss head, spindle protection, spindle rack, carrying case, calibration Certificate, USB cable, Datalogger software and power supply cable.
100-240V, 50-60 Hz, 1Ph

see accessories


The 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.

  Viscosity ranges (mPa•s)
Spindle models 81-PV0118 81-PV0118/A
TR8 50 – 170K 20 – 500K
TR9 250 – 830K 100 – 2.5M
TR10 500 – 1.7M 200 – 5M
TR11 1K – 3.3M 400 – 10M

Temperature control unit  with temperature range from ambient plus 5°C to 300°C. Complete with set of 4 spindles. 
220-240V, 50-60Hz, 1Ph

Temperature control unit  with temperature range from ambient plus 5°C to 300°C. Complete with set of 4 spindles. 
110V, 50-60Hz, 1Ph