Direct Cool II

Direct Cool II

SBT® Technique | Gelation Index | Low-Temperature Viscosity

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.

Methods: ASTM D5133, ASTM D7110, JPI-5S-56-99, Chinese SH/T0732


  • 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.

Dimensions: Bench-top: 37(w) x 61(d) x 69(h) cm (14.5 x 24 x 27 in)
Weight: ~25 kg (55 lbs.)
Voltage: 110-240 VAC
Frequency: 50/60 Hz.
Advanced Features: Thermoelectric Module Cooling eliminates liquid medium, Self-contained pre-heating capability to 90°C
Cooling Capability: +90°C to -40°C (± 0.1°C stability), Average greater than 60°C/hour cool rate
Testing Capacity: One or two test samples per unit, Data-link up to four units with laptop
Safety: Inherent over-temperature measurement/protection/alarm.
CE Mark
Shipping weight & dimensions: ~114 kg (250 lbs.) approx. ~81 x 76 x 104 cm (32 x 30 x 41 inches) approx.

  • 102500: SBT® DC II Automation Package
  • 100022: SBT® Viscometer (TAV-IIIM)
  • 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