Drick DRK-8S Advanced Rotational Viscometer
| Brand | Drick |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Model | DRK-8S |
| Measurement Range | 10–2,000,000 mPa·s |
| Rotor Set | Standard #1–#4 spindles |
| Speed Settings | 0.3, 0.6, 1.5, 3, 6, 12, 30, 60 rpm |
| Accuracy | ±3% of full scale (F.S.) |
| Power Supply | AC 220 V ±10%, 50 Hz ±10% (via external 12 V DC adapter) |
| Operating Environment | 5–35 °C, ≤80% RH |
| Display | Backlit LCD showing viscosity, spindle number, and rotational speed |
Overview
The Drick DRK-8S Advanced Rotational Viscometer is a precision-engineered instrument designed for reliable and repeatable measurement of dynamic viscosity in Newtonian and non-Newtonian fluids. Based on the Couette principle—where torque exerted on a rotating spindle immersed in a sample is proportional to its shear viscosity—the DRK-8S delivers consistent rheological data across a broad range of industrial and laboratory applications. Its modular architecture supports standardized spindle configurations (#1–#4), enabling scalable sensitivity from low-viscosity solvents to highly viscous pastes and gels. Unlike capillary or falling-ball methods, rotational viscometry provides direct shear-rate control and real-time torque response, making it suitable for QC labs, R&D departments, and production environments requiring traceable, process-relevant viscosity characterization.
Key Features
- Microprocessor-controlled motor drive ensures stable rotational speeds across eight discrete settings (0.3–60 rpm), minimizing speed drift and enhancing measurement reproducibility.
- High-contrast backlit LCD display presents real-time viscosity (mPa·s), selected spindle number, and current rotational speed—eliminating manual lookup tables and reducing operator error.
- Rugged mechanical design with precision-machined stainless-steel spindles and calibrated bearing assemblies ensures long-term dimensional stability and minimal thermal drift during extended operation.
- External 12 V DC power adapter isolates the measurement electronics from mains voltage fluctuations, improving signal integrity and supporting safe operation in humid or chemically aggressive lab environments.
- Compliant with ISO 2555 and ASTM D2196 standards for rotational viscosity testing—facilitating method validation and cross-laboratory data comparability.
Sample Compatibility & Compliance
The DRK-8S accommodates a wide spectrum of fluid types—including mineral oils, polymer melts, pharmaceutical suspensions, architectural coatings, adhesives, and surfactant solutions—provided samples are homogeneous and free of particulates larger than 1 mm. For temperature-sensitive measurements, optional accessories such as a circulating water bath and integrated Pt100 temperature probe enable controlled thermal conditions per ISO 3219 and ASTM D445 protocols. The instrument’s mechanical construction adheres to IEC 61010-1 safety requirements for laboratory electrical equipment. While not certified for GMP-regulated environments out-of-the-box, its stable analog-to-digital conversion path and non-volatile parameter storage support retrospective audit trails when used with documented SOPs and calibration logs.
Software & Data Management
The DRK-8S operates as a standalone unit with no proprietary software dependency; all measurements are displayed and retained locally on the device. However, analog output (0–5 V or 4–20 mA) is available via optional interface modules for integration into SCADA systems or LIMS platforms. Users may manually record readings or connect external data loggers compliant with IEEE 11073 or Modbus RTU for time-stamped batch tracking. Though the base model does not include FDA 21 CFR Part 11-compliant electronic signatures or audit trail functionality, its deterministic measurement sequence and fixed firmware versioning allow for validated use under GLP frameworks when paired with procedural controls and periodic verification against NIST-traceable reference oils.
Applications
- Quality control of lubricants and hydraulic fluids in automotive and industrial maintenance programs.
- Batch release testing of topical pharmaceutical formulations (creams, ointments) per USP guidelines.
- Rheological profiling of water-based paints and architectural coatings during formulation development.
- Process monitoring of adhesive viscosity before dispensing or lamination stages in electronics manufacturing.
- Educational demonstrations of shear-thinning behavior in polymer solutions and colloidal dispersions.
FAQ
What spindle configurations are included with the DRK-8S?
The standard delivery includes four precision-machined spindles (#1 through #4), each optimized for distinct viscosity ranges and sample volumes. Optional #0 spindle is available for sub-10 mPa·s measurements.
Can the DRK-8S be used with temperature-controlled sample holders?
Yes—when paired with the optional circulating water bath and double-walled sample cup, the system supports viscosity measurements at constant temperatures between 5 °C and 80 °C.
Is calibration traceable to national standards?
Calibration is performed using NIST-traceable silicone oil standards (e.g., Cannon N47, N1000); users receive a calibration certificate documenting uncertainty values per ISO/IEC 17025 requirements.
Does the instrument meet regulatory requirements for pharmaceutical testing?
While the DRK-8S itself is not pre-validated for cGMP environments, its measurement repeatability (±3% F.S.), stable power architecture, and compatibility with documented calibration procedures make it suitable for Stage 1–2 method development and routine QC under internal validation protocols.
How often should routine verification be performed?
Daily verification using a certified reference fluid is recommended prior to critical measurements; full recalibration is advised every 12 months or after 500 operational hours, whichever occurs first.
