Viscometer / Rheometer
Viscometer / Rheometer
Understanding how a liquid behaves under different shears, temperatures or formulations is essential for quality control, formulation development, process design, and stability testing. Conventional viscometers often require large sample volumes, struggle with non-Newtonian fluids, or provide limited shear-rate control.
That’s where the patented VROC® technology makes a difference: by combining microfluidics and MEMS (Micro-Electro-Mechanical Systems) into a compact, high-precision viscometer – Sphera Analytics delivers accurate, repeatable, small-sample viscosity measurements over a wide dynamic range, for both Newtonian and non-Newtonian fluids.
Instead of relying on traditional bulky capillaries or rotating elements, VROC uses a microfluidic chip with a rectangular slit flow channel and integrated pressure sensors to measure the pressure drop as a fluid flows through the channel. From that, the device calculates true dynamic viscosity as a function of shear rate (and optionally temperature) – even with minute sample volumes.
Key Features of VROC® based viscometers:
Microfluidic Chip Design
Utilizes a patented microfluidic sensor with a pressure-driven flow mechanism, eliminating moving parts and reducing errors.
High Accuracy & Precision
Measures true dynamic viscosity with high repeatability (up to 0.5%) and accuracy (up to 2%)
True viscosity measurement
Not just apparent viscosity at a single condition, but the ability to map viscosity across a range of shear rates or temperatures, which is critical for formulation, QC, and process design.
Minimal sample consumption
Requires only as little as 10–100 µL per test, a major benefit when sample volume is limited (e.g. protein therapeutics, specialty chemicals, high-value materials).
High throughput & reproducibility
Microfluidic flow-through design enables repeated measurements, easy cleanup (or automated chip cleaning), and robust data — reducing errors, saving time, and improving lab efficiency.
Fast Measurements
Provides results in seconds, improving workflow efficiency
Wide shear rates
From 0.86 up to 2,020,000 s⁻¹, suitable for both low (creep flow) and high (injection molding) shear applications
Temperature Control
Integrated Peltier-based temperature control for precise measurements at different temperatures
Discover our compete range of microfluidic viscometers & rheometers.
microVISC
Portable battery-operated viscometer for quick quality control measurements.
microVISC PRO
Precise viscosity measurements up to 650,000 cP and robust temperature control.
Initium One Plus
Automated viscosity measurements, high throughput, and unattended operation!
m-VROC II
Small sample (10 µL), high shear viscometer for R&D.
Not sure which product you need?
Our team will help you to find your optimal instrument.