Show Menu Show Menu Close Menu Close Menu Facebook Facebook Twitter Twitter YouTube YouTube Google Plus Google Plus LinkedIn LinkedIn Search Search Vimeo Vimeo Contact Contact
Tannas Co. & King Refrigeration, Inc. Precision Laboratory Instruments for Routine Testing and Advanced Research & Development of Engine Oils, Lubricants, and Related Fluids

Direct Cool II

SBT® Technique | Gelation Index | Low-Temperature Viscosity

Test Methods

ASTM D5133
ASTM D7110
ASTM D2983 - Proc. D
Chinese SH/T0732


The SBT® test measures the apparent viscosity of fresh, sooted, or highly oxidized engine oils at low temperatures. It determines the susceptibility of engine oils to flow-limited and air-binding responses during slow cooling conditions by providing continuous rheological data over a broad temperature range (+90°C to -40°C).

Additionally, the multi-purpose Direct Cool II can be used for running the automated low-temperature viscosity test for ATF, hydraulic fluids, and gear oils per the new ASTM D2983, Procedure D technique.  The dual-position design allows operators to test two samples simultaneously, or the ability to run a reference sample alongside an unknown sample as indicated in the ASTM method.

Features & Benefits

  • Thermoelectric Module Cooling (TMC) eliminates flammable bath mediums.
  • Small, Dual-position, bench-top footprint.
  • Incorporates new all-digital TAV-IIIM SBT® Viscometer model.
  • SBT® Automation Package (w/Laptop) offers the capability to operate up to four, 2-place Direct Cool II units simultaneously and independently.
  • Self-contained pre-heating: Heats samples up to 90°C prior to prescribed cooling profile.
  • Programmable Temperature Controller maintains bath temperature within ±0.1°C to -40°C.
  • Universal Power capability (110—240VAC, 50/60 Hz)
  • Internal automatic dry air system removes moisture that accumulates during the test.
  • Built-in touchscreen for easy-access temperature control settings and bath operations.

Reference Oils

GIR-150  |  Gelation Index Reference Oil
LNP-5  | Low-Temperature Newtonian Oil

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

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

Parts & Accessories

  • 102500: SBT® DC II Automation Package
  • 100022: SBT® Viscometer (TAV)
  • 160022: SBT® Direct Cool Stator
  • 160021: SBT® Direct Cool Adapter Assembly
  • 160011: SBT® Direct Cool Rotor
  • 100031: Female Hook
  • 160032: Male Hook
  • 160500: SBT® Oil Package
Direct Cool II