Starwood RSX-CC Coaxial Cylinder Rheometer
| Brand | Starwood |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic (China-made) |
| Model | RSX-CC |
| Pricing | Available Upon Request |
Overview
The Starwood RSX-CC Coaxial Cylinder Rheometer is a precision-engineered rotational rheometer designed for comprehensive viscoelastic and flow property characterization of complex fluids and soft solids. Based on the Couette principle—where torque is measured as the outer cylinder rotates relative to a stationary inner cylinder—the RSX-CC delivers high-fidelity shear stress and shear rate data across a broad dynamic range. Unlike cone-and-plate geometries optimized for low-viscosity or surface-sensitive samples, the coaxial cylinder configuration provides superior sensitivity at low shear rates, enhanced thermal stability during extended tests, and robust mechanical reproducibility under industrial QC conditions. The instrument operates in both controlled shear rate (CSR) and controlled shear stress (CSS) modes, enabling full yield stress determination, creep/recovery analysis, oscillatory frequency sweeps, and time-sweep experiments. Its architecture supports ISO 16520, ASTM D2196, and ASTM D445-compliant viscosity measurement protocols, making it suitable for R&D labs, quality control environments, and GLP-regulated facilities requiring traceable rheological data.
Key Features
- High-resolution torque motor with extended dynamic range (0.01–100 mN·m), engineered for accurate yield stress detection and stiff sample evaluation (e.g., gels, pastes, polymer melts)
- Modular geometry system supporting standard coaxial cylinder sets (e.g., CC27, CC13) with precision-machined stainless-steel surfaces and calibrated gap tolerances ≤ ±2 µm
- Integrated 7-inch capacitive touch interface with real-time parameter visualization, intuitive test sequence programming, and onboard method storage (up to 200 protocols)
- Quick-connect rotor mounting mechanism with RFID-enabled identification—eliminates manual calibration entry and ensures geometry-specific parameter auto-loading
- Minimal sample volume requirement (as low as 8–12 mL depending on geometry), reducing material cost and accelerating cleaning cycles between measurements
- Dual thermal management options: Peltier-based semiconductor temperature control (−10 °C to +120 °C, ±0.1 °C stability) or external recirculating bath compatibility (up to +200 °C)
- Industrial-grade chassis with vibration-damping feet and IP52-rated enclosure, certified for continuous operation in manufacturing floor environments
Sample Compatibility & Compliance
The RSX-CC accommodates Newtonian and non-Newtonian liquids, suspensions, emulsions, thermosetting resins, food pastes, pharmaceutical ointments, and crosslinking polymer systems. Its coaxial geometry minimizes edge effects and normal force artifacts, ensuring reliable data for samples with yield stress > 1 Pa and apparent viscosity ranging from 1 mPa·s to 10⁶ mPa·s. The system complies with ISO/IEC 17025 documentation requirements for calibration traceability, supports audit-ready electronic records per FDA 21 CFR Part 11 when paired with validated software, and meets mechanical safety standards IEC 61010-1 and EMC directive 2014/30/EU.
Software & Data Management
The optional Rheo3000 software suite provides full instrument control, real-time curve overlay, automated multi-step test sequencing, and ISO-standardized report generation (PDF/CSV/XLSX). It includes built-in models for Herschel-Bulkley, Cross, and Carreau-Yasuda fitting; time-temperature superposition (TTS) analysis; and storage of metadata including operator ID, environmental conditions, and geometry calibration history. All raw torque, angular displacement, and temperature logs are timestamped with microsecond resolution and support third-party integration via OPC UA or TCP/IP APIs for LIMS and MES connectivity.
Applications
- Quality assurance of adhesives, coatings, and inks—monitoring thixotropic recovery and sag resistance
- Rheokinetic profiling of curing epoxy and silicone formulations under isothermal and ramped temperature conditions
- Yield stress mapping of topical pharmaceutical gels and cosmetic creams for dose uniformity validation
- Process simulation of food processing steps (e.g., pumping, extrusion) using apparent viscosity vs. shear rate curves
- Material screening for additive manufacturing feedstocks, including metal and ceramic slurries
- Regulatory submission support for USP <912> (Rheological Properties of Semisolid Dosage Forms) and EP 2.9.35
FAQ
What sample volume is required for the RSX-CC with standard coaxial cylinder geometry?
Typical volume ranges from 8 mL (CC13) to 12 mL (CC27), depending on cylinder height and gap setting.
Can the RSX-CC perform oscillatory tests such as amplitude and frequency sweeps?
Yes—it supports strain-controlled and stress-controlled oscillatory modes with frequency range 0.01–100 Hz and strain amplitude 0.001–100%.
Is temperature calibration traceable to national standards?
All Peltier modules include factory-certified NIST-traceable calibration certificates; external bath systems require user-provided calibration reports.
Does the system support 21 CFR Part 11 compliance out of the box?
Full compliance requires Rheo3000 software with enabled electronic signatures, audit trail logging, and role-based access control—configured during installation validation.
What maintenance is recommended for long-term torque accuracy?
Annual verification of torque sensor linearity and geometry alignment is advised; Starwood provides certified service kits and remote diagnostic support.
