Dual Measurement Mode Rotational Viscometer

Abstract

A novel dual method concept to widen the viscosity measurement range of magnetic actuation and sensing based viscometer is presented. A phase slipping detection is used for high viscosities, while fluids with low viscosities are studied by applying a step-stress and detecting early stage strain oscillations. Developed dual mode concept was tested and verified by studying water-glycerol solutions with different concentrations. The results show that proposed method significantly improves the measurement capability of the rotational viscosity probe without increasing the overall cost of the system or compromising the advantages (non-contact, nonoptical, disposable, hermetic measurements) of it.

Mechanically flexible viscosity sensor for real‐time monitoring of tubular architectures for industrial applications

“…Moreover, viscosity analysis is employed to ensure product consistency as a quality indicator within the industrial production process, such as in petrochemical, 3‐5 polymers, 6‐8 and food industries 9‐11 . Capillary methods, 12,13 falling‐object methods, 14,15 vibrational, 16‐18 optical 19‐21 and torque detection are various known and reliable techniques for measuring the viscosity using an off‐line workstation setup 22‐24 . The conventional approach for the viscosity measurement procedures in industries starts with on‐site sample collection, followed by laboratory analysis, and, sometimes, requiring sample preparation before examination; it ends with sending the results' report to the site for decision‐making 25 .…”