Applications
Fiber Spinning
Paint Rolling
Roll Coating
Inkjet Printing
Spraying
Electrospinning
Enhanced Oil Recovery
Drag Reduction
Food Processing
RheoSense e-VROC Viscometer
Viscometer capable of measuring apparent extensional viscosity, measures the extensional flow of polymer solutions to help you understand and optimize your industrial processes. By monitoring the sample flow through a microfluidic contraction within the measuring cell, e-VROC® provides precise apparent extensional viscosity data.
Because extensional flows greatly impact the behavior of polymer molecules and asymmetric particles, understanding extensional viscosity allows you to improve your industrial processes. With accurate data, you can gain a deep understanding of the composition of the fluid, predict the impact of that composition on your process, and optimize your process based on the characteristics revealed by the data.
e-VROC®, built with RheoSense’s patented VROC® technology, is an excellent tool for measuring both the extensional and shear viscosities simultaneously.
The viscometer measures the pressure upstream and downstream of a contraction using the MEMS pressure sensors, and it registers changes in the flow. The fluid undergoes an almost constant extension through the contraction/expansion, enabling the calculation of the apparent extensional viscosity.
e-VROC® chip is engineered with a microfluidic channel of uniform width and depth. It has hyperbolic contraction/expansion zone in the middle of the channel and four monolithically integrated MEMS pressure sensors (two in the upstream and two in the downstream of the contraction/expansion zone). A liquid entering the channel first experiences shear flow in the straight channel and then experiences a uniform extension in the contraction zone as illustrated by the elongational shape change of the square in the schematic below.
Compared to other methods of extensional viscosity measurement, e-VROC® allows the measurement of extensional viscosity at high extensional rates.
Technical specifications
Downloads
Minimum Sample Volume: 500 µL
Wide Dynamic Viscosity Range: 1 to 2,000 mPa-s
Temperature Rate: 4 °C to 70 °C
Temperature Stability: ~ +/- 0.07 °C
Extensional Rate: 0.1 to 1,000 s-1
No Evaporation
No Air-Liquid Interface
Characterization of Newtonian and Non-Newtonian Solutions
Accuracy: up to 2% of Reading
Repeatable Measurement: up to 0.5% of Reading
Options
EVROC-A20
EVROC-B20
EVROC-C20
EVROC-E20
EVROC-800-200
VROC-300-1.0H
VROC-300-100-0
VROC-300-100
VROC-300-100DVA
VROC-300-500
VROC-300-1.0
VROC-300-10N
VROC-300-000
VROC-300-001
VROC-300-002
VROC-300-5
VROC-300-6
VROC-400-3
VROC-400-7
VROC-400-8
VROC-400-12
VROC-600-2-N
VROC-600-3
VROC-600-8
VROC-700-5
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