Brookfield DVNext Advanced Rotational Viscometer
| Origin | Shanghai, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Regional Origin | Domestic (China) |
| Pricing | Available Upon Request |
| Spindle Set | #1, #2, #3, #4 |
| Rotational Speeds | 6, 12, 30, 60 rpm |
| Viscosity Range | 10–1×10⁵ mPa·s |
| Accuracy | ±5% of full scale |
| Power Supply | 220 V AC, 50 Hz |
Overview
The Brookfield DVNext Advanced Rotational Viscometer is a precision-engineered instrument designed for reliable, repeatable measurement of dynamic viscosity in Newtonian fluids across industrial and quality control laboratories. Based on the Couette principle—where torque required to rotate a spindle at a defined angular velocity within a stationary fluid is directly proportional to its shear viscosity—the system delivers consistent rheological data under controlled shear conditions. Unlike capillary or falling-ball methods, rotational viscometry enables direct quantification of resistance to flow under adjustable shear rates, making it especially suitable for routine QC testing where reproducibility, operator independence, and regulatory traceability are critical. The DVNext platform integrates mechanical robustness with intuitive operation, supporting standardized test protocols aligned with ASTM D2196, ISO 2555, and USP for pharmaceutical suspensions and semisolids.
Key Features
- Four standard spindles (#1–#4) optimized for distinct viscosity ranges and sample volumes, enabling seamless transition from low-viscosity solvents to highly viscous pastes without recalibration.
- Fixed-speed motor drive delivering four discrete rotational speeds (6, 12, 30, and 60 rpm), each precisely maintained via closed-loop feedback control to ensure stable shear rate application.
- Full-scale viscosity measurement range spanning four decades—from 10 mPa·s (e.g., water, ethanol) up to 100,000 mPa·s (e.g., heavy lubricating oils, tomato paste)—with resolution sufficient to resolve subtle batch-to-batch variations.
- ±5% full-scale accuracy certified per ISO 17025-accredited calibration procedures; spindle geometry and torque sensor are factory-matched and documented with individual calibration certificates.
- Compact benchtop design with aluminum alloy housing, integrated leveling feet, and vibration-dampening base—engineered for stability on shared lab benches without external isolation tables.
- No software dependency for basic operation: analog torque display and manual speed selection allow immediate use in GMP environments where computer validation is restricted.
Sample Compatibility & Compliance
This viscometer accommodates a broad spectrum of Newtonian liquid samples commonly encountered in petrochemical, food & beverage, pharmaceutical, cosmetic, and coatings industries—including crude oil fractions, vegetable oils, printing inks, starch slurries, syrups, topical gels, and acrylic emulsions. Sample volume requirements range from 15 mL (spindle #1) to 500 mL (spindle #4), permitting flexibility in material conservation and container compatibility. All measurements comply with internationally recognized test standards: ASTM D1200 (for paints and varnishes), ISO 2555 (aqueous polymer solutions), and USP (viscosity of semisolid dosage forms). The instrument’s mechanical architecture supports GLP/GMP documentation workflows, including manual logbook entries, audit-ready calibration records, and traceable spindle identification—fully compatible with FDA 21 CFR Part 11 when paired with validated data capture systems.
Software & Data Management
While standalone operation requires no software, optional PC connectivity via RS-232 or USB enables integration with Brookfield’s Rheo3000 software suite. This validated application provides real-time torque and viscosity plotting, automated calculation of apparent viscosity at each speed, statistical reporting (mean, SD, CV%), and export to CSV or PDF formats compliant with internal QA templates. Audit trail functionality logs user ID, timestamp, spindle ID, speed setting, and measured value—supporting 21 CFR Part 11 electronic record requirements when deployed in regulated environments. All firmware updates are delivered through secure, version-controlled channels and accompanied by change-control documentation.
Applications
- Quality assurance of base oils and finished lubricants per ASTM D445 and D7042.
- Routine monitoring of ink yield stress and flow behavior during formulation and production.
- Batch release testing of oral suspensions and topical ointments in accordance with USP monographs.
- Stability assessment of cosmetic emulsions (e.g., lotions, creams) through accelerated aging and viscosity drift analysis.
- Process consistency verification for food products such as ketchup, mayonnaise, and dairy-based sauces under fixed-shear QC checkpoints.
- Raw material qualification for polymer solutions, resins, and adhesive formulations prior to downstream processing.
FAQ
Is this instrument suitable for non-Newtonian fluids?
No—the DVNext Advanced Rotational Viscometer is calibrated and validated exclusively for Newtonian liquids. Non-Newtonian behavior (e.g., shear-thinning, thixotropy) requires a programmable rheometer with variable shear rate ramps and time-dependent testing modes.
Can I use custom spindles or geometries?
Only Brookfield-certified spindles (#1–#4) are supported for traceable accuracy. Third-party or modified spindles invalidate calibration and void compliance with ISO/ASTM standards.
What maintenance is required?
Annual verification of torque sensor linearity and spindle dimensional integrity is recommended. Cleaning must be performed with solvent-compatible tools; immersion in aggressive cleaners or ultrasonic baths is prohibited.
Does the device support temperature control?
No built-in temperature regulation is provided. For temperature-dependent measurements, users must integrate the viscometer with a certified external jacketed sample cup and circulating bath meeting ASTM D445 thermal stability requirements (±0.1°C).
