S-flow IV⁺ Kinematic Viscometer

The latest generation of new S-flow builds on the strong foundation of its predecessors to offer the ultimate in automatic viscosity testing of Newtonian samples such as petroleum products.

S-flow kinomatic viscometer bilde

Model: S-flow IV⁺ Kinematic Viscometer
Manufacture: Omnitek’s Legacy Products

The system offers all the tried and tested advantages of a Houillon-type tube design such as short process times, small sample volume and low solvent consumption, but now also includes an optional autosampler to allow for fully unattended operation. All controlled from a central user interface that takes care of result storage, autosampler control, VI calculations and much more. It complies fully with ASTM D7279 and as such, provides full correlation to ASTM D445. It is the ideal system for used oil analysis labs that need to test a wide range of lubricant viscosities.
The new S-flow IV+ consists of a 2 bath system with 2 tubes in each bath, providing a total of 4 tubes. The baths were designed to work independently, making it possible to use both baths at the same temperature, or at different temperature, ranging from 20°C to 120°C. Other options include dual solvent cleaning and integrated duplo testing which obtains 2 flow time determinations with only 1 sample injection.


  • Applicable for fuels, base oils, formulated oils, and petroleum products as well as water-based fluids
  • Compliant with requirements for ASTM D7279, ASTM 2270 and correlation to ASTM D445
  • High throughput: up to 80 samples per hour under ideal operation conditions
  • Very easy to use and maintain
  • Small sample volume: 0.3 – 1.0 ml
  • Low solvent consumption: 2 – 3 ml per sample.
  • Extremely accurate temperature control and flow-time measurement independent of fluid type
  • Automatic calibration of the optic amplifiers
  • Automatic flow time measurement with ultraprecise meniscus detection
  • Fully automatic cleaning and drying
  • Fast & easy tube replacement (tubes are not connected to optical sensors)
  • No need to drain bath during tube replacement.
  • Single or dual solvent injection (optional)
  • Measurement at 2 temperatures in 1 system simultaneously
  • Integrated VI calculations
  • Stand-alone unit. No PC required.
  • Chemically resistant to allow for all common solvents
  • Bath scheduler to turn baths on/off on preset times saves energy when the lab is closed and ensures the system is ready to go when it opens back up
  • Bath temperature graphs on screen
  • Bath backlight to improve visibility of viscometer tubes and sensors
  • User Access Control
  • Duplo measurement capability
  • Integrated back flushing
  • Optional autosampler