CAV 4.2 Dual-Bath Kinematic Viscometer

CANNON product

For Kinematic Viscosity of Transparent and Opaque Liquids ASTM D445/D446, ISO 3104/3105, IP 71. CAV® 4.2 is a fully automated, dual-bath, benchtop viscometer with two 14-position sample handlers for unattended D445 processing. 

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An on-board computer and user-friendly touch-screen interface allow a single CAV 4.2 unit to be run without an external PC. For higher throughput labs, a single external PC can manage up to four CAV 4.2 instruments using the powerful VISCPRO software. Multiple pre-defined and user-defined test methods can be run in the same sample tray to maximize flexibility and save valuable set up time. Status indicator bath lights provide a simple, easily viewed indication of operational status ensuring worry-free operation.

Cost-saving features include a tube design that reduces solvent usage and disposal costs by more than 50%. Single-point temperature calibration avoids tube recalibration costs and maximizes test flexibility. Automated vial washing and drying reduces vial consumption costs and replaces manual washing, saving time.


Additional information


Residual Fuel




ASTM D445, ASTM D446, IP 71, ISO 3104, ISO 3105

Features & Benefits

D445 precision in a modern, dependable design

  • Temperature range: ambient to 100 °C (15 °C to 150 °C with available bath options)
  • Viscosity range: 0.5 mm²/s (cSt) to 10,000 mm²/s (cSt)* in 100-fold increments (easily covering the range of 5 separate manual glass viscometers)
  • Dual, independent modular baths enable simultaneous testing at two different temperatures
  • Two fully accessible, 14-position sample handlers ensure reliable, unattended processing of up to 24 determinations per hour
  • Automation provides an alternative to labor-intensive manual testing and reduces operator to operator variability
  • A well tested CANNON viscometer platform offers reliability and dependable support

Compact & self-contained with flexible configuration

  • Simple, out-of-the-box installation
  • 35% smaller footprint conserves lab space
  • Optional, environmentally friendly Peltier cooling requires no external refrigeration
  • An onboard computer enables preprogrammed test parameters to be run without an external PC
  • VISCPRO® PC software enables programming of user-defined test methods and permits one PC to manage and control up to four instruments
  • User-configurable reports may be viewed, printed, saved and exported

Reduced consumable costs

  • ASTM D445/ISO 3105 Ubbelohde-style tubes reduce solvent usage and disposal costs by 50%
  • Automated vial washing and drying enables reuse and reduces vial consumption

Simplified maintenance and test versatility

  • Modular bath for easy maintenance access
  • Operators physically replace tubes in minutes, eliminating the need for related service calls
  • Single-point temperature calibration avoids tube recalibration costs and maximizes flexibility
  • Colored status indicator bath lights provide a simple remote indication of operational status
  • Multiple predefined/user-defined test methods can be run within the same sample tray
  • (Optional) High throughput, selective zone heating preheats individual samples to any temperature from ambient to 100 °C
  • Instrument includes standard dual-solvent input

* Some upper viscosity measurements may be limited by test temperature and sample type. Fast run (10-fold range) tubes are also available.



CAV 4.2 – Feature Video


CAV 4.2 –  Operation Video