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Tannas Co. & King Refrigeration, Inc. Precision Laboratory Instruments for Routine Testing and Advanced Research & Development of Engine Oils, Lubricants, and Related Fluids


Midland, Michigan: Tannas Co. announces a new addition to its instrument line, the TBS 3000 HTHS Viscometer. This newest Tapered Bearing Simulator (TBS) model is used for routine HTHS quality control and quality assurance testing purposes for meeting D4683, D6616, SH/T 0618 and CEC L-36 test methods between 80°C and 150°C at typical shear rates between 500,000 and 3 million sec-1.

The TBS 3000 HTHS Viscometer is completely redesigned and re-innovated providing multiple enhancements to automation, calibrations, electrical and temperature components, and oil injection features, improving the overall user experience. These advancements promote simplified operations and less reference oil usage with integrated components, while offering the same or better precision and robustness as previous TBS models.

Developed in 1979 and under several patents, the TBS Viscometer became the world’s first high shear viscometer and was readily applied to lubricant analysis. With HTHS viscosity measurements being a key determining test parameter in producing lower viscosity and more fuel-efficient engine oils, the TBS remains the modern benchmark ‘referee’ instrument for HTHS viscometry due to its innovative measurement technique, high precision, robust design and notable operational versatility.

“We are very pleased to be bringing this new TBS model to market addressing multiple customer- driven improvements.” says Gordon Cox, Vice President of Marketing, Sales & Customer Support at

Tannas Co. “The TBS brings a high level of productivity and ease of use for both research and routine QA lab testing of ‘fresh’ and ‘used’ oil applications at multiple temperatures and shear rate combinations.”

Notable features and benefits of the TBS 3000 HTHS Viscometer include:

  • Integrated 40-position AutoSampler with auto single-injection mechanism
  • Enhanced automation features with integrated software and touchscreen control –Eliminating computer, DAQ Boards and associated cabling.
  • Reduced reference oil and sample usage volumes
  • Custom LED lighting scheme based on operating condition The TBS 3000 HTHS Viscometer is now available for purchase.

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About Tannas Co.: Tannas Co. (ISO 9001:2015) is a global leader in developing, manufacturing and sales &

service of precision laboratory instruments for routine testing and advanced research & development of engine oils, lubricants, and related fluids. We dedicate ourselves to serving our customers, large and small — listening carefully to their concerns and needs — responding with intelligent action — transforming their concerns into satisfaction and their needs into mutual opportunities.