Thermo Fisher HAAKE Viscotester D (R-Version) Rotational Viscometer
| Brand | Thermo Fisher |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Product Origin | Imported |
| Model | Viscotester D (R-Version) |
| Pricing | Available Upon Request |
Overview
The Thermo Fisher HAAKE Viscotester D (R-Version) is a benchtop rotational viscometer engineered for precision measurement of dynamic viscosity in Newtonian and mildly non-Newtonian fluids under controlled shear conditions. Based on the classical Couette principle, it employs a concentric cylinder geometry—comprising a rotating outer cup and a stationary inner bob—to generate well-defined shear rates across the sample gap. This architecture ensures high reproducibility and compliance with standardized test methods including ASTM D2196, ISO 2555, and DIN 53019. Designed for routine quality control and R&D laboratories, the instrument delivers stable torque sensing via electromagnetic compensation technology, enabling accurate viscosity determination from 1 mPa·s to over 1 × 10⁶ mPa·s depending on spindle and speed selection. Its compact footprint, intuitive front-panel interface, and integrated temperature monitoring support seamless integration into regulated environments where traceability and operator independence are critical.
Key Features
- Electromagnetic torque transducer with digital signal processing for high-resolution viscosity readout (±1% full scale accuracy typical)
- Programmable rotational speed range: 0.01–200 rpm in 0.01 rpm increments, supporting both single-point and multi-speed flow curve acquisition
- Dedicated R-Version firmware with preconfigured test protocols for paints, coatings, adhesives, pharmaceutical suspensions, and food emulsions
- Integrated Pt100 temperature sensor input (optional external probe compatible) for real-time thermal correction per ISO 3219
- Robust aluminum alloy housing with ESD-safe design and CE/UKCA marking for laboratory safety compliance
- Auto-zero calibration routine and built-in diagnostic self-test prior to each measurement cycle
Sample Compatibility & Compliance
The Viscotester D (R-Version) accommodates standard DIN/ISO spindles (LV, RV, HA, HB series) and optional cylindrical or vane geometries for structured or thixotropic samples. It supports sample volumes from 15 mL (with small-volume adapter) to 500 mL (standard cup), enabling testing of low-yield-stress gels, polymer melts, and high-solids slurries without wall slip artifacts. The system meets requirements for GLP and GMP environments through audit-trail-capable operation logs (when paired with optional PC software), and its mechanical design conforms to IEC 61010-1 for electrical safety in laboratory instrumentation. All calibration certificates are NIST-traceable and issued with uncertainty budgets per ISO/IEC 17025 guidelines.
Software & Data Management
While fully functional as a stand-alone unit, the R-Version supports optional HAAKE RheoWin software (v4.0 or later) for advanced data handling. This Windows-based application enables method-driven workflows, automated viscosity vs. shear rate plotting, yield stress estimation via Casson or Bingham models, and export to CSV, PDF, or XML formats. Software-controlled measurements comply with FDA 21 CFR Part 11 requirements when configured with electronic signatures, role-based access control, and immutable audit trails. Raw torque and speed data are timestamped and stored with metadata—including ambient temperature, operator ID, and calibration status—for full analytical traceability.
Applications
- QC testing of industrial lubricants, transformer oils, and hydraulic fluids per ASTM D445
- Formulation development of water-based paints and architectural coatings (ISO 2555)
- Rheological screening of oral suspensions and topical gels in pharmaceutical manufacturing (USP <911>)
- Stability assessment of dairy creams, plant-based beverages, and starch-thickened sauces
- Process validation of polymer dispersions and ceramic slurries prior to extrusion or casting
- Educational use in university materials science labs for teaching fundamental rheological concepts
FAQ
Does the Viscotester D (R-Version) support yield stress measurement?
Yes—when used with appropriate spindles (e.g., vane or serrated bob) and combined with RheoWin software, it enables yield stress estimation via controlled shear ramp or oscillatory startup tests.
Is temperature control integrated into the base unit?
No—the instrument includes a Pt100 input for external temperature monitoring but requires a separate circulating bath or Peltier stage for active temperature regulation.
Can this viscometer be validated for use in regulated pharmaceutical environments?
Yes—when deployed with documented IQ/OQ protocols, calibrated spindles, and RheoWin software configured for 21 CFR Part 11 compliance, it satisfies validation requirements for QC labs operating under cGMP.
What spindle sets are supplied by default?
The standard configuration includes an LV spindle set (spindles #1–4) and a 600-mL stainless steel measuring cup; RV/HA/HB spindles and small-volume accessories are available as options.
How often does the instrument require recalibration?
Annual calibration is recommended; however, daily verification using certified silicone oil standards (e.g., Cannon N47 or N100) is advised for critical applications.
