ATAGO VISCO Advanced Ultra-Low-Viscosity Rotational Viscometer
| Brand | ATAGO |
|---|---|
| Origin | Japan |
| Instrument Type | Benchtop Rotational Viscometer |
| Model | VISCO (Ultra-Low-Viscosity Configuration) |
| Viscosity Range | 1–2,000 mPa·s |
| Temperature Accuracy | ±0.2°C |
| Operating Temperature Range | 10.0–40.0°C (Sample), 10–40°C (Ambient) |
| Speed Range | 0.5–250 rpm (20 discrete steps) |
| Torque Display Range | 0.0–100.0% (Recommended: 10.0–100.0%) |
| Temperature Display Range | 0.0–100.0°C / 32.0–212.0°F |
| Resolution | Viscosity — 0.01 mPa·s (≤100), 0.1 mPa·s (100–10,000), 1 mPa·s (>10,000) |
| Viscosity Accuracy | ±1% of full scale |
| Power Supply | DC 6V (4 × AA alkaline batteries) or AC adapter (100–240 V AC) |
| Battery Life | ~7 hours (continuous operation at 60 rpm) |
| Data Interface | USB to PC |
| Compliance | Designed for GLP-compliant viscosity testing in QC and R&D environments |
Overview
The ATAGO VISCO Advanced Ultra-Low-Viscosity Rotational Viscometer is a precision-engineered benchtop instrument designed specifically for reliable, high-resolution measurement of low-viscosity Newtonian and near-Newtonian fluids within the critical range of 1 to 2,000 mPa·s. Built upon Couette-type rotational viscometry principles, the system employs a concentric cylinder geometry—enabled by the dedicated Ultra-Low-Viscosity Adapter (ULA, Cat. No. RE-77120)—to maximize torque sensitivity while minimizing wall-slip and end-effects that commonly compromise accuracy at sub-10 mPa·s levels. Unlike standard spindle-based viscometers, the ULA configuration utilizes a shallow-depth, large-surface-area cylindrical rotor and matching sample cup, significantly increasing shear area and reducing required torque for measurable deflection. This architecture ensures stable, reproducible readings even for volatile solvents, aqueous buffers, thin coatings, and low-concentration polymer solutions where conventional instruments exhibit poor signal-to-noise ratios or drift.
Key Features
- Ultra-low-viscosity optimized mechanical design with ULA adapter (RE-77120), enabling accurate measurements down to 1 mPa·s without dilution or extrapolation
- Dual-mode temperature monitoring: real-time sample temperature sensing via integrated Pt100 sensor with ±0.2°C accuracy and digital compensation across full operating range (10.0–40.0°C)
- 20-step programmable speed control (0.5–250 rpm), allowing precise shear rate selection aligned with ASTM D2196 and ISO 2555 methodologies
- High-resolution digital display showing simultaneous viscosity (mPa·s/cP), temperature (°C/°F), and % torque—with dynamic resolution scaling (0.01 mPa·s below 100 mPa·s)
- Benchtop-fixed architecture with vibration-dampened base and rigid ULA mounting platform for enhanced measurement stability during extended runs
- USB data export capability for traceable, timestamped viscosity and temperature logs compatible with LIMS and electronic lab notebook (ELN) integration
- Compliance-ready firmware supporting audit trail generation and user-access controls per FDA 21 CFR Part 11 requirements when used with validated software protocols
Sample Compatibility & Compliance
The VISCO ULA system accommodates samples requiring minimal volume (typically 15–25 mL depending on cup geometry) and demonstrates robust performance across chemically diverse matrices: aqueous electrolytes, organic solvents (e.g., acetone, ethanol, THF), ink carriers, pharmaceutical syrups, food-grade emulsions, and semiconductor process fluids. Its stainless-steel ULA rotor and anodized aluminum sample cup resist corrosion from mildly aggressive media. All measurement protocols align with internationally recognized standards including ISO 3219 (rotational viscometry), ASTM D1200 (Ford Cup conversion reference), and USP for viscosity characterization of liquid dosage forms. The instrument’s ±1% full-scale viscosity accuracy and documented temperature calibration traceability support GLP and GMP-regulated environments, particularly in quality control laboratories performing routine release testing or stability studies.
Software & Data Management
While the VISCO operates as a standalone unit with intuitive front-panel controls, its USB interface enables direct connection to Windows-based PCs running ATAGO’s proprietary VISCO Data Manager software (v3.2+). This application provides real-time graphing of viscosity vs. time or shear rate, automatic calculation of apparent viscosity, yield point estimation via Bingham or Casson model fitting (for quasi-plastic samples), and batch report generation compliant with ISO/IEC 17025 documentation requirements. Raw data exports are provided in CSV format with metadata headers (timestamp, operator ID, instrument serial number, temperature, RPM, torque %), facilitating import into statistical analysis platforms such as JMP or Minitab. Audit trails record all parameter changes, measurement starts/stops, and calibration events—essential for regulatory submissions and internal QA audits.
Applications
- Quality assurance of low-viscosity industrial solvents and cleaning agents in electronics manufacturing
- Routine viscosity verification of vaccine diluents, ophthalmic solutions, and injectable excipients per pharmacopeial monographs
- Process development and optimization of water-based paints, UV-curable inks, and adhesive primers
- Stability monitoring of nanoemulsions and micellar systems during accelerated aging studies
- Teaching laboratory use for fundamental rheology experiments demonstrating Newtonian behavior and temperature dependence (Arrhenius analysis)
- Raw material screening for surfactant blends, fuel additives, and lubricant base stocks
FAQ
What is the minimum sample volume required for ULA measurements?
Typical ULA configuration requires 18–22 mL of sample to ensure full immersion of the rotor and thermal equilibrium within the cup.
Can the VISCO perform temperature-controlled measurements?
The instrument measures sample temperature in real time with ±0.2°C accuracy but does not include active Peltier or bath-based temperature control; external thermostatted baths are recommended for isothermal studies below 10°C or above 40°C.
Is calibration traceable to national standards?
Yes—ATAGO provides NIST-traceable viscosity calibration certificates using certified silicone oil standards (e.g., Cannon N27, N3000) and temperature calibration against PTB-accredited references.
How does the ULA adapter differ from standard spindles?
The ULA replaces traditional spindles with a geometrically optimized concentric cylinder system offering 3.2× greater shear surface area and reduced boundary layer distortion, resulting in higher torque signals and lower relative uncertainty at sub-10 mPa·s levels.
Does the VISCO support Good Manufacturing Practice (GMP) documentation?
When operated with validated procedures and the optional Data Manager software, the system supports 21 CFR Part 11 compliance through electronic signatures, immutable audit trails, and role-based access control configurations.
