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Updated: Feb 22, 2026

Calibration Procedures for Orthogonal Superposition Rheology
Published on: November 18, 2020
An automated system for performing continuous viscosity versus temperature measurements of fluids using an Ostwald
L Y Beaulieu1, E R Logan2, K L Gering3
1Department of Physics and Physical Oceanography, Memorial University, St. John's, Newfoundland A1B 3X7, Canada.
Abstract:
An automated system was developed to measure the viscosity of fluids as a function of temperature using image analysis tracking software. An Ostwald viscometer was placed in a three-wall dewar in which ethylene glycol was circulated using a thermal bath. The system collected continuous measurements during both heating and cooling cycles exhibiting no hysteresis. The use of video tracking analysis software greatly reduced the measurement errors associated with measuring the time required for the meniscus to pass through the markings on the viscometer. The stability of the system was assessed by performing 38 consecutive measurements of water at 42.50 ± 0.05 °C giving an average flow time of 87.7 ± 0.3 s. A device was also implemented to repeatedly deliver a constant volume of liquid of 11.00 ± 0.03 ml leading to an average error in the viscosity of 0.04%. As an application, the system was used to measure the viscosity of two Li-ion battery electrolyte solvents from approximately 10 to 40 °C with results showing excellent agreement with viscosity values calculated using Gering's Advanced Electrolyte Model (AEM).
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