TBS 3000 HTHS Viscometer

High-Temperature, High Shear Rate Rotational Viscosity
Test Methods
  • ASTM D4683 | D6616
  • CEC L-36-90
  • IP 370
  • JPI-5S-36-03
  • Reference Technique for ASTM D4741 and D5481

High-Temperature, High Shear Rate Rotational (Absolute) Viscosity: The coaxial Rotor/Stator design permits the exact measurement of rotor position and the torque response of the liquid’s resistance to flow (viscous friction), which determines the apparent fluid viscosity. Applying a constant and linear shear rate profile continually to the fluid makes the TBS an absolute viscometer where the ‘true’ shear rate is calculated from known dimensions and speed of rotation. The TBS measures the viscosities of fresh and used oils at multiple select shear rates and temperatures. This proves particularly useful with multi-grade oils and their influence on fuel efficiency.

Developed in 1979 and under several patents, the TBS Viscometer became the world’s first high shear viscometer. It remains the modern benchmark ‘referee’ instrument for HTHS viscometry due to its innovative measurement technique, robust design, and notable operational versatility.

This newest TBS model is completely redesigned and re-innovated providing multiple enhancements to electrical and temperature components, automation, calibrations, and oil injection features, dramatically improving the overall user experience. These advancements promote simplified operations and less reference oil usage with no separate components while offering the same or better precision and robustness as previous TBS models.

  • Integrated Custom Control System with custom PCB Boards and built-in TBS Touch Software – Eliminates computer, DAQ Boards, and associated cabling.
  • Improved operating stability to varying lab environment conditions.
  • Built-in 40-position AutoSampler with auto single-injection mechanism.
  • Incorporates (10) easily replaceable Reference Oil containers (Quart, 1/2 Gal. or Gal.).
  • Custom LED lighting scheme based on operating condition.
  • Innovative temperature control system – no external cooling bath for 80° operation.
  • Auto-monitoring of Waste Oil container with Overfill Alarm.
  • Remote data access with Ethernet connection.
  • Barcode reader compatible.

HTHS Newtonian Reference Oils

HTHS Non-Newtonian Reference Oils

Additional TBS Reference Oils

R-100 | RL 236*

NNR-03 | RL 240*


R-200 | R-2200 | RL 241*


Idling Oil

R-300 | R-2300



R-350 | R-2350 | RL 242*


R-400 | RL 238*




R-450 | R-2450 | RL 239*


R-500 | RL 237*




For a complete listing of part numbers and available container sizes of Tannas Reference Oils, please review the Tannas Reference Oils & Catalysts Parts List.

Visit our Certified Reference Materials page to download SDS sheets or Oil Certificates.

Reference Oils & Catalysts

330100: 150°C Ref Oil Package ½ GAL
330102: 100°C Ref Oil Package ½ GAL
330103: 80°C Ref Oil Package ½ GAL
020001: BIF-03 (Pint) Ref Oil

Dual–ring, 40-position Sample Carousel with Auto Sample Receiver Arm.

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TBS 3000 HTHS Viscometer


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