TFAB™ | Tannas Foam Air Bath​

Foam Tendency & Stability of Lubricating Oils

Test Methods

ASTM D892   |   Sequence I, II, III

ASTM D6082   |   Sequence IV

IP 146

Chinese GB/T12579

Chinese SH/T0722



High foaming tendency and slow foam collapse time are two undesirable responses of engine oils and hydraulic fluids which can result in mechanical failure. The TFAB™ measures the tendency and stability of foam additive effectiveness in oils and lubricants over a broad temperature range (24°C to 150°C).


The single air bath approach of the TFAB™ dramatically reduces bench space requirements, eliminates the need to replace oxidized (discolored) bath oil, permits more accuracy in reading foam levels, and significantly reduces the hazards of operating sequences of higher temperatures. The TFAB™ has shown correlation in ASTM round robin studies and has assisted in ASTM efforts of improving the test method precision.


Features & Benefits

  • The non-liquid system eliminates hazardous bath mediums from laboratory environments.
  • New Direct Drive motor for quiet and maintenance-free operation.
  • Thermal equivalence at all locations within bath - no temperature variations among samples.
  • Removable six-position cylinder carousel; convenient side-mounted cylinder drying rack.
  • New touchscreen controller and thermocouple placement for accurate control via sample temperature.
  • Progressive timer with audible alarms for simplified determination of Collapse Time in D6082 test.
  • Built-in cool ‘tap’ water circulation system aids cooling from higher temperature Sequences and maintains 24°C in warmer lab environments. Optional Chiller Bath available for labs without a cold tap water source nearby.


Reference Oils

F-100   |   Foam Reference Oil for ASTM D892

F-200   |   Foam Reference Oil for ASTM D892 & ASTM D6082


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


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


Parts & Accessories

ASTM D892 & D6082:


550120:  Water Displacement Exit Air Measuring Device

550122:  Digital Exit Air Measuring Device

550156:  Air Flow Calibration Device

550154:  Digital Gas Diffuser Verification Device

550080:  TFAB™ Chiller Bath

550016:  Glass Cylinder - 1000 mL

550157:  Stainless Steel Diffuser Stone - Certified

550145:  Diffuser Tube Assembly

550029:  Centering Washer

550018:  Air Tubing - 18” Tygon

550020:  Probe s/s 18”

970137:  Lamp LED - Foam Bath

550125:  Cylinder Stopper Assembly (3 hole)

550060:  Spare Fuse Set - 220V, 50/60 Hz

550037:  Carousel Rubber Stopper

040004:  F-100 Reference Oil (1.89 L)

040005:  F-200 Reference Oil (1.89 L)

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TFAB™ | Tannas Foam Air Bath

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