CANNON's full array of manual glass viscometers

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Manual Glass Viscometers
Use of high quality instruments ensures test reliability and accuracy, and all CANNON glass capillary viscometers are traceable to a NIST calibration and manufactured in our ISO 9001-registered, A2LA-accredited laboratory. CANNON Instrument Company has been making glass capillary viscometers since 1938 and because no single viscometer is ideally suited to every application, we offer a wide variety of glass capillary viscometers. Our experienced staff is happy to assist you with viscometer selection. Viscometer options include:

  • Transparent-For transparent/translucent liquids
  • Suspended Level-For transparent/translucent liquids. Ideal for testing at multiple temperatures because they have the same viscometer constant at all temperatures.
  • Dilution-For dilution of polymer solutions to provide an estimate of the molecular size and shape.
  • Reverse Flow-For transparent and opaque liquids. Must be cleaned, dried and refilled between repeat determinations.
  • Vacuum-A special type of reverse-flow viscometer for highly viscous samples (transparent or opaque). Accurately controlled vacuum is required to pull the liquid through the viscometer.


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CANNON Instrument Company
CANNON Instrument Company has earned international acclaim for the quality of its viscosity-related products and services since its founding in 1938 by scientist, inventor, and educator Dr. Michael R. Cannon. The company's longstanding emphasis on production of premier-quality test equipment has kept CANNON at the cutting-edge of research and development.



  • Automated Viscometers & Rheometers
  • Viscosity & Flash Point Standards
  • Constant Temperature Baths
  • Manual Glass Viscometers
  • Physical Property Testers
  • Service & Support
  • Densitometers
  • Digital Thermometers