Brookfield DV-II+Pro EXTRA Rotational Viscometer

Overview

The Brookfield DV-II+Pro EXTRA Rotational Viscometer is an engineered precision instrument designed for routine and demanding viscosity measurement across industrial QC laboratories, R&D facilities, and production environments. Based on the well-established Couette principle—where torque generated by a rotating spindle immersed in a fluid is proportional to its dynamic viscosity—the DV-II+Pro EXTRA delivers high reproducibility and long-term stability under continuous operation. Its core architecture integrates three proprietary mechanical enhancements: the Q-Drive vertical positioning stand for ergonomic sample access, the ball-bearing suspension system for enhanced sensor durability and reduced mechanical drift, and the EZ-Lock rotor attachment mechanism for rapid, repeatable, and operator-independent rotor installation. These features collectively address critical pain points in high-throughput testing scenarios—including shift-based operations, multi-user labs, and frequent sample changes—without compromising metrological integrity.

Key Features

• Q-Drive Vertical Positioning Stand: A spring-assisted, push-button actuated lift mechanism enabling smooth, controlled vertical movement over a 120 mm travel range. Designed to reduce operator fatigue during repetitive sample loading/unloading cycles, especially in 24/7 operational settings.
• Ball-Bearing Suspension System: Replaces traditional jeweled bearings with precision-ground stainless-steel ball bearings housed in a sealed, lubricated cartridge. This design extends mean time between maintenance (MTBM) significantly—validated by extended field use at Colgate-Palmolive—and maintains calibration compliance over prolonged high-duty-cycle operation.
• EZ-Lock Rotor Connection: A two-step, tool-free coupling interface that ensures consistent axial alignment and torque transfer. Eliminates cross-threading, misalignment, and mechanical stress on the sensor shaft during rotor swaps—critical for maintaining measurement fidelity in shared-lab or training-intensive environments.
• 54-Step Programmable Speed Control: Covers 0.1–200 rpm in discrete increments, supporting both steady-shear characterization and time-dependent protocols such as ramp tests and timed-stop measurements.
• Integrated Temperature Monitoring: Compatible with Brookfield’s PT-100 temperature probe (included), enabling real-time thermal tracking synchronized with viscosity acquisition—essential for temperature-sensitive formulations including polymers, coatings, and pharmaceutical suspensions.

Sample Compatibility & Compliance

The DV-II+Pro EXTRA supports a broad spectrum of Newtonian and non-Newtonian fluids—from low-viscosity solvents (as low as 1 cP with ULA) to highly structured pastes (up to 320 million cP with HB spindles). Optional accessories—including Small Sample Adapter (SSA), Ultra-Low Viscosity Adapter (ULA), Thermosel heating bath, and DIN-compliant spindle holders—extend applicability to regulatory-compliant workflows. The instrument meets general requirements for ASTM D2196, ISO 2555, and USP , and its data output structure supports audit-ready documentation when used with RheoCalc software configured for GLP/GMP environments. While the base unit does not include FDA 21 CFR Part 11 electronic signature functionality, full audit trail capability (user log, method versioning, raw data timestamps) is available via optional Wingather software deployment.

Software & Data Management

RheoCalc software (included) provides intuitive test setup, real-time graphing, and export-ready reporting in CSV, PDF, and Excel formats. It supports custom method templates, pass/fail limits, statistical summaries (mean, SD, CV%), and automatic calculation of shear rate and shear stress based on spindle geometry and rotational parameters. DV Loader enables direct instrument control from Microsoft Excel for legacy process integration. For regulated environments, Wingather (optional) adds role-based user authentication, electronic signatures, and immutable audit trails compliant with FDA 21 CFR Part 11 Annex 11 requirements. All software packages store raw torque/time/temperature datasets with metadata—ensuring traceability from measurement to final report.

Applications

This viscometer serves diverse sectors requiring robust, repeatable rheological screening: quality control of paints, inks, adhesives, and personal care emulsions; batch release testing of food syrups, dairy products, and sauces; formulation development of battery slurries and ceramic suspensions; and stability assessment of pharmaceutical gels and ointments. Its reliability under sustained load makes it particularly suitable for 24/7 monitoring in pilot plants or contract manufacturing organizations (CMOs) where instrument uptime directly impacts throughput and compliance readiness.

FAQ

What is the difference between the DV-II+Pro EXTRA and standard DV-II+Pro models?
The EXTRA variant includes the Q-Drive vertical positioning stand, upgraded ball-bearing suspension (excluding LV models), EZ-Lock rotor system, and extended 2-year warranty—features not bundled in the base DV-II+Pro configuration.
Can the DV-II+Pro EXTRA be used for yield stress estimation?
While not a dedicated yield stress instrument, it supports approximate yield value determination using controlled-stress ramp tests with appropriate spindle selection and RheoCalc analysis modules.
Is temperature control integrated into the instrument?
No—temperature sensing requires the optional PT-100 probe (included), but active temperature regulation necessitates external equipment such as a circulating water bath or Thermosel heater.
Which rotor sets are supplied with each model variant?
LV models ship with four spindles (L1–L4); RV, HA, and HB models include six spindles (R1–R6, A1–A6, or B1–B6 respectively), all fitted with EZ-Lock compatibility.
Does the instrument support automated data export to LIMS?
Yes—via CSV or Excel export from RheoCalc, or through Wingather’s ODBC-compliant database interface for direct LIMS integration.