High Performance Rotational Viscometer

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The High Performance Rotational Viscometer is used for high-performance measurement of apparent viscosity of binders. 


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.

• Selected speed r.p.m.
• Selected spindle SP
• Viscosity reading cP (mPa·s) or cSt
• Percentage of full scale %
• Sample temperature °C or F
• Shear Rate (with coaxial spindles) SR (s -1)
• Shear Stress (with coaxial spindles) SS (N/m2)
• Density (introduced by the user) g/cm3
• Viscosity reading: dynamic viscosity (cP or mPa·s) or kinematics viscosity (cSt).
• Unit converter SI to CGS.
• Program features:
• Time to torque & Time to stop
• 9 working memories
• Customizable speed options
• Multistep
• Ramp
• AUTO-TEST: automatical internal viscosimeter checking
• AUTO-RANGE: full scale range for combination spindle speed.
• Temperature reading by PT100.
• User-enabled viscosity and temperature calibration.
• 10 language options. 


  • Precision: ± 1% of full scale
  • Resolution: 1 For viscosity equal to or above 10.000 cP: 1
  • Repeatability: 0.2%
  • Thermometer features:
  • Temperature margins: 0o C to +100o C 32o F to 212.0 o F
  • Resolution: 0.1o C / 0.1722 o F
  • Precision: +/- 0.1 o C
  • Type of probe: PT100
  •  Supplied at 100-240 VAC, 50/60 Hz
  • Shipping weight: approx. 8 kg

Viscosity ranges (mPa•s)
Spindle models
TR850 – 170 K
TR9250 – 830 K
TR10500 – 1.7 M
TR111 K – 3.3 M