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BitUVisc Kinematic Viscometer

Fully automatic viscometer for highly viscous samples up to 120,000 mm²/s

Omnitek ‘BitUVisc’ is a programmable, fully automatic kinematic viscometer specially designed to handle highly viscous samples at high temperatures.

The system can process samples with viscosities ranging up to 120,000 mm2/s, up to 150°C. It fully complies with ASTM D445, D446, D2170 and AASHTO T201.

There are 2 different models available: 110 and 120. BitUVisc 110 features a single thermostatic bath with 1 viscometer tube whereas BitUVisc 120 model holds 2 viscometer tubes in a single bath. All BitUVisc instruments are equipped with auto-sampling, preheating, fully automatic dual solvent cleaning and drying.

Viscometer tubes are based on the well-known and proven Ubbelohde design. Using specially designed thermal sensors, these tubes allow the detection of fully opaque fluids without any problems or limitations and eliminate the need to use the reverse flow tubes. The standard configuration offers viscosity measurement up to 150°C and sample preheating up to 200°C.

Sophisticated temperature control ensures that measurements are carried out well within the required temperature stability. The system features an innovative single position auto-sampling which provides integrated heating of the sample up to 200°C and uses preheated solvent to effectively clean the viscometer tube. The BitUVisc is fitted with special designed duplo viscometer tubes for unstable samples such as vacuum residues, additives, crude oils, waxes, heavy fuel oils, polymers, asphalts, etc., which typically show poor determinability when sampled repeatedly. These tubes have 2 measuring sections with an approximately similar tube constant. This allows for an actual duplo determination while only sampling once.

Compliant with the following test methods:

ASTM D2170
EN 12595

Fully Automatic
High Accuracy
Handles extreme samples
Easy to use
Duplo viscometer tubes

BitUVisc 110 / 120
Measuring range
Up to 120,000 mm2/s, up to 150°C
Temperature range
15 – 150°C *
Temperature stability

15°C to 100°C ± 0.01°C *

Up to 150°C, ± 0.03°C

Preheater temperature

Up to 200°C

Timer accuracy

0.001 s

Sample volume

12 ml 

Sample introduction


Solvent consumption

10 – 30 ml per cycle, sample dependent 

Sample throughput

BitUVisc 110: up to 2 measurements per hour **

BitUVisc 120: up to 4 measurements per hour **

Applicable standards

ASTM D445/D446, ASTM D2170 
AASHTO T201, EN 12595

Viscometer type

Ubbelohde based

Duplo Measurement


Sensor type


Built-in preheater


Dual Solvent cleaning




PC software


PC Control

Multiple instruments controlled with 1 PC

Data Export

USB storage device


110 / 120: 38 x 62 x 78 cm (w x d x h) 


54 kg (empty)

Power requirement

10A @ 230 V

*  For temperatures around ambient, an external cooling circulator is required
** Measurements per/hour; depends on viscosity, tube constant, temperature and solvents chosen. Measurement cycles are given for a sample with a viscosity around 50.000 mm2/s @ 40°C.

  • Applicable for fuels, base oils, formulated oils, highly viscous samples like vacuum residues, additives, crude oils​waxes, heavy fuel oils, polymers, asphalts, etc.
  • Meets all ASTM, EN, ISO, DIN, AASHTO T201, EN 12595 and standards related to kinematic viscosity standards
  • Extremely accurate temperature control
  • Extremely accurate flow-time measurement independent of fluid type
  • Viscometer filling by vacuum method
  • Innovative and efficient viscometer tube cleaning allowing cross contamination free operation
  • Easy viscometer tube exchange
  • Chemically resistant to an extended range of fluids and solvents
  • Compact design
Resources & Downloads

BitU-Visc Kinematic Viscometer Enquiry

For more information or to arrange a call from one of the Crea Fluid Analysis Team, please complete the contact form.  If your enquiry is urgent, please call us on 1300 552 725.

BitUVisc Kinematic Viscometer Enquiry








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