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e-VROC™ Viscometer — Extensional Viscosity


A Quick Look: e-VROC Key Capabilities:
• Accuracy: Up to 2% of Reading
• Repeatability: 0.5% of Reading
• Wide Viscosity Range: 10 — 2,000 mPa-s
• Minimum Sample Volume: 500 µL
• Extensional Rate: 0.1  1,000 s-1
• No Evaporation — No Air-Liquid Interface

e-VROC™ Viscometer — Extensional Viscosity


 
Full Specifications
 
• Minimum Sample Volume 500 µL
• Extensional Rate, s-1 0.1 – 1,000 s-1
• Viscosity Range 10 – 2,000 mPa-s (cP)
• Temperature Specification 4 — 70 °C
• Accuracy Up to 2% of Reading
• Temperature Stability ~ +/- 0.07 °C
e-VROC Viscometer
• Shear Rate Sweeps Yes
• Sample Measuring Time Less Than One Minute
• Temperature Sweeps Yes
• Repeatability Up To 0.5% of Reading
• Evaporation, Air/Liquid Interference No

 

 

 

 

 

 

e-VROC™ Viscometer — Extensional Viscosity


Operate Your e-VROC In Three Steps:

 

e-VROC Directions

e-VROC™ Viscometer — Extensional Viscosity


Chip Configurations
Chip Types Flow Channel Depth (microns) Max. Viscosity (Pa-s) Max. Shear Rate (1/s) Application
A20 200 10k Pa Full Scale 56,000 Small Sample, Low Viscosity
B20 200 40k Pa Full Scale 100,00 Small Sample, Medium Viscosity
C20 200 200k Pa Full Scale 200,000 Small Sample, High Viscosity
E20 200 1.8M Pa Full Scale 1,400,000 High Shear
  

e-VROC Overview


 
1. Oil & Lubrication: Oil Analysis & Formulation of Lubricants (High Temperature & High Shear Rate)
2. Cannabis:  THC, CBD, Wax/Hash Oils
3. Biopharmaceutical: Antibody Therapeutics
4. Polymer: Single Point Intrinsic Viscosity
5. Inks: Ceramic Inks, Water-Based Inkjet Inks, Conductive Inks
6. Miscellaneous:  Solubility, Intrinsic Viscosity, Volatile Compounds, Non-Newtonian Characterization 

e-VROC Overview


 
e-VROC™, the 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.

Competitive Advantages


 

 1. Main Advantages: 

⇒ Fast Results: 3 Seconds to Under 1 Minute

⇒ Shear Rate & Temperature Rate Sweeps

⇒ Data Is Not User Dependent:

⇒ High Temperature Capabilities (Up to 105 °C)

⇒ Closed System - No Air Interface 

 

2. Additional Advantages:

⇒ Peltier-Based Temperature Control (TC) 

⇒ The Only Apparent Extensional Viscometer Solution On The Market

⇒ Fast & Easy Clean Up: No Special Solvents Needed

⇒ Minimal Calibration (Suggested ~1x Per Year) 

⇒ Intuitive User Interface: PC Compatible

 

**When Using NIST Traceable Standards

e-VROC Principle


 

The e-VROC™ chip is engineered with a microfluid 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. 

e-VROC Chip Cross Sectional e-VROC

Compared to other methods of extensional viscosity measurement, e-VROC allows the measurement of extensional viscosity at high extensional rates. The system 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 extensional viscosity.

Chip Selection


 
Choosing the VROC chip(s) for your instrument depends on the user's desired shear rate range, viscosity range, and particle size (if applicable).
 
RheoSense offers transparent dummy chips with which one an study the effectiveness of candidate cleaning solvents. These dummy chips can also be used for sample compatibility and configuring cleaning protocols without the risk of breaking the VROC Chip.
 

VROC Dummy Chip:

Flow Channel Variability of: 50 µm, 100 µm, 200 µm, & 300 µm

RheoSense VROC Dummy Chip, 50 µm

Figure Above: VROC Dummy Chip, 50 µm
 

Sample being pushed into Dummy Chip

Figure Above: Sample is pushed through the dummy chip via pipette

Key Applications


 
The e-VROC viscometer is tailored for measuring fluids with certain extensional viscosity properties which exhibit thickening beyond the Trouton ratio found for Newtonian fluids, creating a solution for a niche market in several industries.
 
Specific applications include (but are not limited to): 
 
 Fiber Spinning, 
• Paint Rolling
 Roll Coating
 Inkjet Printing/Spraying
 Electrospinning
 Enhanced Oil Recovery
 Drag Reduction
 Food Processing
 
Extensional deformation and extensional shearing have a significant impact on certain industrial processes. Access our free technical application note to learn more!
Access Technical Note

e-VROC Node Part Number List:


 
To identify specific e-VROC parts, cross reference the part number (p/n) using the chart below. 
 
If your parts are not listed here, please contact us directly here.
 
EVROC-SW-UP

Upgrade for compatibility wtih e-VROC (Firmware & Software)

VROC-300-002

1.0 mm ID plastic needle

EVROC-A20

Extensional Viscometer 200 µm deep hyperbolic channel with 10k Pa pressure sensors w/ 400 µm contraction

VROC-300-5

0.5 mm needle assembly

EVROC-B20

Extensional Viscometer 200 µm deep hyperbolic channel with 40k Pa pressure sensors w/ 400 µm contraction

VROC-300-6

1.0 mm Union w/ 35 µm S.S. Mesh Filter & Needle Assembly

EVROC-E20

Extensional Viscometer 200 µm deep hyperbolic channel with 200k Pa pressure sensors w/ 400 µm contraction

VROC-400-3

1/4 - 28 Union

EVROC-800-200

Extensional Viscometer 200 µm deep hyperbolic channel with 1600k Pa pressure sensors w/ 400 µm contraction

VROC-400-7

1/4-28 Black Cap

VROC-300-1.0H

1 mL Syringe w/ UHMPE Seal

VROC-400-8

Fitting 4-28 to Zero Dead Volume Syringe

VROC-300-100-0

Zero Dead Volume 100 µL Syringe w/ Adapter 

VROC-400-12

Inlet Valve & Inlet Tubing Assembly (Specify inlet tubing diameter of 250/500/1000  µm)

VROC-300-100

100 µL Syringe

VROC-600-2-N

0.5 mL Syringe jacket (Compatible for 100/250/500 µL Syringes)

VROC-300-100DVA

ILS 100 µL, zero dead volume adjustable syringe

VROC-600-3

1 mL Syringe Jacket

VROC-300-500

500 µL Syringe

VROC-600-8

10 mL Syringe Jacket

VROC-300-1.0

1 mL Syringe

VROC-700-2

Water Bath w/ Temperature Control, from 4 - 105 °C (Flourinert Compatible)

VROC-300-10N

10 mL Cone Shape Plug Syringe

VROC-7002-3

Water Bath w/ Temperature Control, from 4 - 80 °C (Flourinert Compatible)

VROC-300-000

Union & Plastic Needle Assembly

VROC-700-5

Water Bath w/ Temperature Control, from 4 - 70° C

VROC-300-001

0.5 mm ID plastic needle

e-VROC

Ready To See For Yourself?


 

If you're curious to learn more & see if this instrument can work for you, register for a live demonstration of the e-VROC viscometer for free!
 

m-VROC-1

• Other questions/inquiries? Contact us by clicking below!

Contact Us

e-VROC Overview


 
1. Oil & Lubrication: Oil Analysis & Formulation of Lubricants (High Temperature & High Shear Rate)
2. Cannabis:  THC, CBD, Wax/Hash Oils
3. Biopharmaceutical: Antibody Therapeutics
4. Polymer: Single Point Intrinsic Viscosity
5. Inks: Ceramic Inks, Water-Based Inkjet Inks, Conductive Inks
6. Miscellaneous:  Solubility, Intrinsic Viscosity, Volatile Compounds, Non-Newtonian Characterization 

e-VROC Overview


 
e-VROC™, the 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.

Competitive Advantages


 

 1. Main Advantages: 

⇒ Fast Results: 3 Seconds to Under 1 Minute

⇒ Shear Rate & Temperature Rate Sweeps

⇒ Data Is Not User Dependent:

⇒ High Temperature Capabilities (Up to 105 °C)

⇒ Closed System - No Air Interface 

 

2. Additional Advantages:

⇒ Peltier-Based Temperature Control (TC) 

⇒ The Only Apparent Extensional Viscometer Solution On The Market

⇒ Fast & Easy Clean Up: No Special Solvents Needed

⇒ Minimal Calibration (Suggested ~1x Per Year) 

⇒ Intuitive User Interface: PC Compatible

 

**When Using NIST Traceable Standards

e-VROC Principle


 

The e-VROC™ chip is engineered with a microfluid 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. 

e-VROC Chip Cross Sectional e-VROC

Compared to other methods of extensional viscosity measurement, e-VROC allows the measurement of extensional viscosity at high extensional rates. The system 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 extensional viscosity.

Chip Selection


 
Choosing the VROC chip(s) for your instrument depends on the user's desired shear rate range, viscosity range, and particle size (if applicable).
 
RheoSense offers transparent dummy chips with which one an study the effectiveness of candidate cleaning solvents. These dummy chips can also be used for sample compatibility and configuring cleaning protocols without the risk of breaking the VROC Chip.
 

VROC Dummy Chip:

Flow Channel Variability of: 50 µm, 100 µm, 200 µm, & 300 µm

RheoSense VROC Dummy Chip, 50 µm

Figure Above: VROC Dummy Chip, 50 µm
 

Sample being pushed into Dummy Chip

Figure Above: Sample is pushed through the dummy chip via pipette

Key Applications


 
The e-VROC viscometer is tailored for measuring fluids with certain extensional viscosity properties which exhibit thickening beyond the Trouton ratio found for Newtonian fluids, creating a solution for a niche market in several industries.
 
Specific applications include (but are not limited to): 
 
 Fiber Spinning, 
• Paint Rolling
 Roll Coating
 Inkjet Printing/Spraying
 Electrospinning
 Enhanced Oil Recovery
 Drag Reduction
 Food Processing
 
Extensional deformation and extensional shearing have a significant impact on certain industrial processes. Access our free technical application note to learn more!
Access Technical Note

e-VROC Node Part Number List:


 
To identify specific e-VROC parts, cross reference the part number (p/n) using the chart below. 
 
If your parts are not listed here, please contact us directly here.
 
EVROC-SW-UP

Upgrade for compatibility wtih e-VROC (Firmware & Software)

VROC-300-002

1.0 mm ID plastic needle

EVROC-A20

Extensional Viscometer 200 µm deep hyperbolic channel with 10k Pa pressure sensors w/ 400 µm contraction

VROC-300-5

0.5 mm needle assembly

EVROC-B20

Extensional Viscometer 200 µm deep hyperbolic channel with 40k Pa pressure sensors w/ 400 µm contraction

VROC-300-6

1.0 mm Union w/ 35 µm S.S. Mesh Filter & Needle Assembly

EVROC-E20

Extensional Viscometer 200 µm deep hyperbolic channel with 200k Pa pressure sensors w/ 400 µm contraction

VROC-400-3

1/4 - 28 Union

EVROC-800-200

Extensional Viscometer 200 µm deep hyperbolic channel with 1600k Pa pressure sensors w/ 400 µm contraction

VROC-400-7

1/4-28 Black Cap

VROC-300-1.0H

1 mL Syringe w/ UHMPE Seal

VROC-400-8

Fitting 4-28 to Zero Dead Volume Syringe

VROC-300-100-0

Zero Dead Volume 100 µL Syringe w/ Adapter 

VROC-400-12

Inlet Valve & Inlet Tubing Assembly (Specify inlet tubing diameter of 250/500/1000  µm)

VROC-300-100

100 µL Syringe

VROC-600-2-N

0.5 mL Syringe jacket (Compatible for 100/250/500 µL Syringes)

VROC-300-100DVA

ILS 100 µL, zero dead volume adjustable syringe

VROC-600-3

1 mL Syringe Jacket

VROC-300-500

500 µL Syringe

VROC-600-8

10 mL Syringe Jacket

VROC-300-1.0

1 mL Syringe

VROC-700-2

Water Bath w/ Temperature Control, from 4 - 105 °C (Flourinert Compatible)

VROC-300-10N

10 mL Cone Shape Plug Syringe

VROC-7002-3

Water Bath w/ Temperature Control, from 4 - 80 °C (Flourinert Compatible)

VROC-300-000

Union & Plastic Needle Assembly

VROC-700-5

Water Bath w/ Temperature Control, from 4 - 70° C

VROC-300-001

0.5 mm ID plastic needle

e-VROC

Ready To See For Yourself?


 

If you're curious to learn more & see if this instrument can work for you, register for a live demonstration of the e-VROC viscometer for free!
 

m-VROC-1

• Other questions/inquiries? Contact us by clicking below!

Contact Us

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