IKA ROTAVISC hi-vi I COMPLETE Rotational Viscometer

Overview

The IKA ROTAVISC hi-vi I COMPLETE is a high-precision, portable rotational viscometer engineered for reliable characterization of non-Newtonian and highly viscous fluids under ambient conditions. Based on Couette flow principle—where torque exerted on a rotating spindle immersed in the sample is measured to determine dynamic viscosity—the instrument delivers traceable, reproducible results across an exceptionally wide range of 200 to 80,000,000 mPa·s. Its modular architecture supports both routine QC testing and method development in regulated environments, including pharmaceutical manufacturing, polymer R&D, and battery material formulation labs. Unlike capillary or falling-ball systems, this viscometer maintains consistent shear history control via programmable ramp profiles, enabling direct quantification of thixotropy, yield stress approximation, and structural recovery kinetics.

Key Features

• High-resolution torque sensing with ±1% full-scale reading (FSR) accuracy and ±0.2% FSR repeatability—validated per ISO/IEC 17025 calibration protocols.
• Infinitely variable speed control from 0.01 to 200 rpm, enabling precise shear rate sweeps for rheological profiling.
• 4.3-inch capacitive TFT touchscreen interface with real-time viscosity vs. time/speed curve rendering and on-device data export via USB.
• Integrated electronic level sensor for automatic horizontal alignment verification—critical for minimizing gravitational bias in high-viscosity measurements.
• RAMP mode functionality: predefine up to 20 discrete rotational speeds within a single test sequence to generate complete flow curves and assess hysteresis behavior.
• Modular spindle compatibility—including SP7–SP12 geometry sets and optional T-shaped spindles—for optimized measurement of gels, pastes, slurries, and structured emulsions.
• Optional HELISTAND motorized lift unit enables repeatable immersion depth control and eliminates operator-induced mechanical perturbation during spindle insertion or withdrawal.

Sample Compatibility & Compliance

The ROTAVISC hi-vi I COMPLETE accommodates samples ranging from semi-solid ointments (e.g., topical pharmaceuticals per USP ) to lithium-ion battery electrode slurries and epoxy resin precursors. Its sealed spindle housing and corrosion-resistant stainless-steel construction meet IP54 environmental protection standards. When paired with external thermostatic baths (via RS232 or analog output), the system supports temperature-controlled viscosity analysis compliant with ASTM D2196 (non-Newtonian fluids) and ISO 2555 (aqueous polymer solutions). All measurement metadata—including timestamp, spindle ID, speed, temperature, and torque values—is logged with audit-trail integrity suitable for GLP and GMP documentation requirements.

Software & Data Management

The instrument operates standalone but integrates seamlessly with IKA’s proprietary ROTAVISC PC software (Windows-based) for advanced data visualization, statistical batch reporting, and compliance-ready export formats (CSV, PDF, XML). Software modules support 21 CFR Part 11–compliant user access controls, electronic signatures, and immutable audit logs. Raw torque and angular velocity data are captured at ≥10 Hz sampling frequency, permitting post-acquisition calculation of apparent viscosity, shear stress, and consistency index (K) using power-law modeling. Exported datasets retain full metrological traceability to NIST-traceable reference oils calibrated per ISO 8503-2.

Applications

• Pharmaceutical QA/QC: Viscosity profiling of hydrogels, ointments, and suspensions to ensure batch-to-batch consistency and compliance with pharmacopoeial monographs.
• Battery materials development: Monitoring rheological evolution of cathode/anode slurries during mixing, aging, and solvent evaporation to optimize coating uniformity and electrode density.
• Personal care product formulation: Quantifying spreadability and structural breakdown of creams, foundations, and sunscreens using controlled-shear ramp tests.
• Adhesives & sealants R&D: Evaluating open time, sag resistance, and thixotropic recovery in acrylic, silicone, and polyurethane formulations.
• Food science: Characterizing texture stability of starch gels, chocolate masses, and plant-based dairy alternatives under shear-reversal protocols.

FAQ

Does the ROTAVISC hi-vi I COMPLETE support temperature-controlled measurements?
Yes—when connected to an external recirculating chiller or water bath via its analog temperature input and RS232 interface, the system enables viscosity testing at defined temperatures between 5 °C and 80 °C (dependent on bath specifications).
Can it measure yield stress?
While not a dedicated yield stress rheometer, the instrument supports approximate yield point estimation using controlled-stress ramp methods or extrapolation from low-shear viscosity plateaus when used with appropriate geometry (e.g., vane or serrated spindles).
Is calibration traceable to international standards?
All factory calibrations are performed using NIST-traceable standard oils (Brookfield-certified viscosity standards), with certificates issued per ISO/IEC 17025 requirements.
What spindle geometries are included by default?
The ROTAVISC hi-vi I COMPLETE Complete package includes six standardized spindles (SP7–SP12), each individually serialized and certified for geometry-specific correction factors.
How is data security ensured during regulatory audits?
The embedded firmware and optional PC software provide role-based user authentication, electronic signature capture, and tamper-evident audit trails meeting FDA 21 CFR Part 11 and EU Annex 11 expectations.