Brookfield ULA Ultra-Low Viscosity Adapter
| Brand | Brookfield |
|---|---|
| Origin | USA |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Origin Category | Imported |
| Model | ULA |
| Pricing | Available Upon Request |
Overview
The Brookfield ULA (Ultra-Low Viscosity Adapter) is an engineered precision peripheral designed specifically for extending the low-end viscosity measurement capability of Brookfield rotational viscometers and rheometers—including the DVNext series, DV2T, DV3T, and legacy DV-II and DV-III platforms. Based on Couette flow geometry, the ULA employs a concentric cylinder configuration where torque is measured via magnetic coupling between the motor-driven outer cylinder (sample cup) and the inner stationary spindle (rotor). This principle ensures high sensitivity and reproducibility in the ultra-low shear-rate, low-torque regime—critical for characterizing dilute polymer solutions, biological buffers, solvents, microemulsions, and low-viscosity coatings. Unlike cone-and-plate or small-angle geometries, the ULA’s fixed-gap cylindrical design delivers stable hydrodynamic conditions across its operational range without requiring gap calibration, making it ideal for routine QC labs and R&D environments where speed, repeatability, and minimal sample consumption are paramount.
Key Features
- Measures viscosities as low as 1.0 cP (mPa·s), depending on instrument model and selected spindle configuration
- Minimal sample requirement: only 16 mL per test—reducing material cost and waste, especially valuable for expensive or scarce formulations
- Quick-install modular design with magnetic-coupled rotor connection—enables tool-free attachment/detachment directly onto standard Brookfield viscometer spindles
- Stainless steel construction for all wetted components (cup, rotor, base cap), ensuring corrosion resistance and compatibility with aqueous and mild organic solvents
- Interchangeable base caps: includes six reusable stainless steel caps; optional disposable low-density polyethylene (LDPE) caps available for single-use applications to prevent cross-contamination
- Integrated water-jacketed sample cup for precise temperature control when used with external circulators (e.g., Brookfield TC-550 or equivalent)
- Universal mounting bracket compatible with all Brookfield viscometers equipped with standard spindle couplers (e.g., LV, RV, HA, HB series)
Sample Compatibility & Compliance
The ULA adapter supports Newtonian and mildly non-Newtonian fluids within its validated range. It is routinely employed in pharmaceutical buffer characterization (per USP and ), semiconductor cleaning solution validation, inkjet fluid screening, and cosmetic base formulation. All mechanical interfaces comply with Brookfield’s proprietary spindle interface specifications (ANSI/ISO 2555-compliant torque transmission protocol). The stainless steel components meet ASTM F899 standards for surgical-grade stainless alloys, and surface finish adheres to ISO 13485 cleanability requirements. When operated with FDA 21 CFR Part 11–compliant software (e.g., Rheo3000 v5.2+), audit trails, electronic signatures, and data integrity controls can be fully implemented—supporting GLP and GMP-regulated workflows.
Software & Data Management
The ULA operates transparently within Brookfield’s standard software ecosystem: Rheo3000 (for DVNext/DV3T), ViscoQC 200, or older PC-based WinCT programs. No firmware updates or driver installations are required—the adapter is detected automatically upon spindle selection. Software enables real-time shear rate calculation (based on geometric constants), automatic viscosity range mapping, and export of raw torque/time data in CSV or Excel-compatible formats. Batch reporting templates support IQ/OQ documentation, and all measurements retain full metadata (instrument ID, operator, timestamp, temperature, spindle ID, and calibration certificate traceability). Data archives are encrypted and version-controlled in accordance with ISO/IEC 27001 information security guidelines.
Applications
- Quality control of low-viscosity excipients (e.g., PEG 200, ethanol, propylene glycol) in oral liquid dosage forms
- Rheological profiling of aqueous enzyme solutions and cell culture media under physiological shear conditions
- Viscosity stability testing of UV-curable acrylates during photoinitiation kinetics studies
- Batch-to-batch consistency verification of lithium-ion battery electrolytes (LiPF6 in EC/DMC)
- Screening of nanofluid dispersants and surfactant efficacy in colloidal stabilization
- Validation of cleaning-in-place (CIP) rinse solutions in biopharmaceutical manufacturing
FAQ
Which Brookfield instruments are compatible with the ULA adapter?
The ULA is fully compatible with all Brookfield viscometers and rheometers featuring standard threaded spindle couplers—including the DVNext, DV2T, DV3T, DV-I Prime, and legacy DV-II and DV-III series.
Can the ULA be used for non-Newtonian fluid characterization?
Yes—within its specified shear rate range (typically 0.1–100 s⁻¹, dependent on instrument model and speed setting), the ULA supports controlled-shear-rate (CSR) and controlled-shear-stress (CSS) modes for yield stress and flow curve analysis.
Is temperature control mandatory for accurate measurements?
While not strictly mandatory, temperature control via the water-jacketed cup is strongly recommended: viscosity of sub-10 cP fluids exhibits >2% per °C sensitivity; use with a calibrated external bath (±0.1°C stability) ensures ASTM D2196-compliant repeatability.
What maintenance is required for long-term reliability?
Routine cleaning with isopropanol or deionized water followed by air-drying is sufficient; avoid ultrasonic cleaning of the magnetic coupling assembly to preserve alignment integrity.
