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Water Separability of Petroleum Oils and Synthetic Fluids

Water Separability of Petroleum Oils and Synthetic Fluids

Test Method

The ability of a lubricating oil to separate from water and resist emulsification is an important performance characteristic for applications involving water contamination and turbulence. Water separability is determined by stirring equal volumes of water and sample together at a controlled temperature to form an emulsion and observing the time required for separation of the emulsion to occur. This method is suitable for petroleum oils and synthetic fluids.

Water Separability Tester

Tests emulsion characteristics of lubricating oils
Seven sample capacity
Movable digital stirrer with microprocessor control incorporates advanced features for flexibility and ease of operation
Clear, illuminated heating bath provides excellent visibility
Microprocessor temperature control with digital display and built-in protection against overtemperature and low liquid level hazards
Conforms to ASTM, ISO and related standards for water separability testing
Optional sensor for direct measurement of sample temperature
With built in drain for convenient draining of bath medium

Ordering Information

Catalog No.

K39400 Water Separability Tester, 115V 60Hz
K39496 Water Separability Tester, 230V 50/60Hz


332-002-018 Cylinder 100mL, graduated from 5 to 100mL with 1.0mL divisions
250-000-19F ASTM 19F Thermometer. Range: 120 to 134°F
250-000-19C ASTM 19C Thermometer. Range: 49 to 57°C
250-000-21F ASTM 21F Thermometer. Range: 174 to 188°F
250-000-21C ASTM 21C Thermometer. Range: 79 to 87°C
K39252 PTFE Policeman
K39251 Test Tube Rack