ATAGO VISCO 6811 Digital Ultra-Low Viscosity Viscometer

Overview

The ATAGO VISCO 6811 is a precision benchtop viscometer engineered specifically for reliable, high-resolution measurement of ultra-low viscosity liquids—ranging from 1 to 2,000 mPa·s (cP). Unlike conventional rotational viscometers optimized for medium- to high-viscosity fluids, the VISCO 6811 integrates ATAGO’s proprietary Ultra-Low Viscosity Adapter (ULA, Cat. No. RE-77120) to extend sensitivity into the sub-10 mPa·s regime while maintaining mechanical stability and thermal equilibrium. It operates on the principle of controlled-shear rotational viscometry: torque exerted on a rotating spindle immersed in the sample is measured and converted to dynamic viscosity using calibrated geometry and known shear rate profiles. The system employs a microprocessor-controlled DC motor with 20 discrete speed settings (0.5–250 rpm), enabling precise shear-rate selection critical for Newtonian validation and non-Newtonian behavior screening. Its compact, self-contained architecture eliminates external circulation baths or Peltier modules—making it ideal for rapid QC checks, R&D screening, and routine quality assurance where sample volume, turnaround time, and thermal inertia are limiting factors.

Key Features

• Ultra-low viscosity capability enabled by the dedicated ULA adapter (RE-77120), featuring a specialized low-moment-of-inertia spindle and shallow-depth sample cup geometry to minimize wall effects and enhance signal-to-noise ratio below 10 mPa·s
• Triple-range viscosity measurement support (A1/A2/A3) via interchangeable spindles—ensuring optimal resolution across overlapping ranges without recalibration
• Real-time simultaneous display of viscosity (mPa·s/cP), torque (%), and temperature (°C/°F) on a high-contrast digital LCD screen
• ±1% full-scale viscosity accuracy and ±0.2 °C temperature accuracy—validated per internal metrology protocols traceable to JIS Z 8000 series standards
• USB interface for direct data logging to Windows-based PCs; compatible with ATAGO’s proprietary VISCO Data Manager software for time-stamped export, statistical analysis, and GLP-compliant report generation
• Battery-powered operation (4 × AA alkaline, ~7 h runtime at 60 rpm) plus optional universal AC adapter (100–240 V)—supporting both lab and field-deployable use cases

Sample Compatibility & Compliance

The VISCO 6811 is validated for aqueous solutions, solvents, thin oils, ink carriers, electronic cleaning fluids, pharmaceutical syrups (diluted), and polymer dispersions within the 1–2,000 mPa·s range. Sample volume requirement is ≤15 mL with the ULA configuration, minimizing material consumption during early-stage formulation. All measurements adhere to fundamental principles outlined in ISO 2555 (plastics—resins in solution—determination of viscosity number) and ASTM D2196 (standard test methods for rheological properties of non-Newtonian materials). While the instrument itself does not carry CE or FDA certification, its measurement methodology supports compliance with GMP Annex 11 and FDA 21 CFR Part 11 when used with audit-trail-enabled software configurations and documented calibration records. Temperature control is passive (ambient-equilibrated); users must precondition samples to 10.0–40.0 °C prior to testing to ensure repeatability aligned with ISO 5626-1.

Software & Data Management

Data acquisition and reporting are managed via ATAGO’s VISCO Data Manager (v3.x), a Windows-compatible application that captures timestamped viscosity, torque, and temperature readings at user-defined intervals. The software enables batch ID assignment, operator login tracking, and automatic generation of PDF reports compliant with internal QA templates. Raw CSV exports include metadata headers (instrument ID, date/time, spindle code, speed, temperature), facilitating integration with LIMS platforms such as LabWare or Thermo Fisher SampleManager. Audit trails record all parameter changes, file exports, and calibration events—meeting baseline requirements for GLP documentation. No cloud connectivity or remote firmware updates are supported; all configuration remains local and deterministic.

Applications

• Quality control of volatile organic solvents (e.g., acetone, ethanol, THF) in fine chemical manufacturing
• Routine monitoring of inkjet ink carrier viscosity pre-filtration and post-dilution
• Stability assessment of nanoemulsions and colloidal dispersions during accelerated aging studies
• Viscosity verification of low-viscosity pharmaceutical excipients (e.g., PEG 200, propylene glycol) against USP specifications
• Process consistency checks for semiconductor wafer rinse solutions and photoresist strippers
• Educational labs requiring robust, entry-level instrumentation for teaching Newtonian fluid behavior and shear-thinning identification

FAQ

What spindle configurations are included with the VISCO 6811 kit?
The 6811 kit includes the VISCO host unit and one Ultra-Low Viscosity Adapter (ULA, RE-77120), comprising a dedicated low-torque spindle, shallow sample cup, mounting base, and alignment fixtures. Additional A1/A2/A3 spindles are sold separately.
Is temperature control active or passive?
Temperature measurement is active (PT100-grade sensor), but thermal regulation is passive—the instrument assumes sample pre-equilibration within 10.0–40.0 °C. No built-in heating/cooling module is provided.
Can the VISCO 6811 be used for non-Newtonian samples?
Yes—by measuring viscosity across multiple rotational speeds (0.5–250 rpm), users can construct flow curves and identify shear-thinning or shear-thickening behavior, though yield stress determination requires complementary instrumentation.
Does the device support automated calibration verification?
No—calibration verification must be performed manually using certified silicone oil standards (e.g., Cannon N27, N32) traceable to NIST SRM 2490 series.
What is the minimum sample volume required with the ULA adapter?
12–15 mL, depending on meniscus adjustment; the ULA geometry minimizes dead volume while ensuring full spindle immersion and consistent gap definition.