m-VROC® Viscometer — Controlled Shear Rates and Small Samples

m-VROC Viscometer — Controlled Shear Rates and Small Samples

m-VROC is the leading automated, small sample viscometer used worldwide by Fortune Global 500 companies and leading research universities. Capable of the most demanding applications including small sample protein therapeutics, m-VROC™ features the widest dynamic range (high shear rate viscosity measurements up to 1,400,000 s^-1) with as little as 50 microliters of sample.

Accuracy: 2% of Reading
Repeatability: 0.5% of Reading
Viscosity Range: 0.2 ~ 100,000 mPa-s (or cP)
Shear Rate Range: 0.5 ~ 1,400,000 s^-1
Small Sample Volume: 50 µL
Viscometer Dimensions: 10" x 15.5" x 7"

m-VROC Viscometer — Controlled Shear Rates and Small Samples

Minimum Sample Volume	50 µL
Maximum Shear Rate, s^-1	0.5 ~ 1,400,000 s^-1
Viscosity Range, mPa-s (cP)	0.2 ~ 100,000 cP
Temperature Range*	4~70 ^oC
Accuracy	2% of Reading
Repeatability	0.5% of Reading
Temperature Sensor	Built-In
Software	Included
Non-Newtonian?	Yes!
Temperature Sweep	Yes!
Shear Rate Sweep	Yes!

*Temperature ranges can be extended
*Chip depths can be customized based on your application!

Selection of Chips*:

Types	Flow channel depth (µm)	Min viscosity (mPa-s)	Max viscosity (mPa-s)	Maximum shear rate (1/s)	Application
A	50	0.2	100	56,000	Small sample Low viscosity
	100
	200
B	50	0.2	3,000	100,000	Small sample Medium viscosity
	100
	200
C	50	10	14,000	200,000	Small sample High viscosity
	100
	200
E	50	1	100,000	1,400,000	High shear
	100
	200

m-VROC Viscometer — Controlled Shear Rates and Small Samples

	Step 1: Load the syringe with your sample
	Step 2: Tighten the syringe into the chip enclosure and secure it inside the thermal jacket
	Step 3: Bring down the top of the thermal jacket enclosure and lock it by turning the black thumb screw clockwise— you are ready to measure your sample!

Understanding Fluid Behavior — Measuring Absolute Viscosity

With VROC^® Technology, RheoSense took the standard principles of rheometry and created a dynamic micro-sample viscometer by adding microfluidics while reducing the size of the device with MEMS (micro-electrical mechanical systems) manufacturing. The result was a new platform which offers capabilities that are well beyond the limits of conventional viscometers in not only the sample volumes required, but the measurement range and precision.

Scientific Principle

The measuring cell or “chip” contains a rectangular slit flow channel constructed of borosilicate glass, with a uniform cross-sectional area. The sample is injected at a constant flow rate though the flow channel where multiple pressure sensors mounted within the base monitor the pressure drop from the inlet to the outlet. The pressure drop is correlated with the shear-stress at the boundary wall. The shear rate and shear stress are directly related to the geometry of the rectangular slit and the flow rate which allow for viscosity measurements.

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m-VROC^®Viscometer — Controlled Shear Rates and Small Samples

VISCOMETER SPECIFICATIONS

m-VROC Viscometer — Controlled Shear Rates and Small Samples

m-VROC Viscometer — Controlled Shear Rates and Small Samples

m-VROC Viscometer — Controlled Shear Rates and Small Samples

Understanding Fluid Behavior — Measuring Absolute Viscosity

Scientific Principle

m-VROC Viscometer — Controlled Shear Rates and Small Samples

m-VROC Viscometer — Controlled Shear Rates and Small Samples

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