Brookfield DVNext CP Cone-Plate Rheometer

Overview

The Brookfield DVNext CP Cone-Plate Rheometer is a precision-engineered rotational rheometer designed for high-fidelity viscosity and yield stress characterization of structured fluids under controlled shear conditions. Utilizing the cone-and-plate geometry, it operates on the principle of Couette flow—where a precisely angled conical rotor rotates above a flat, temperature-regulated plate, establishing a uniform shear rate across the sample gap. This configuration ensures exceptional sensitivity to low-viscosity samples and accurate determination of yield stress via controlled stress ramping or oscillatory protocols. The instrument is purpose-built for laboratories requiring regulatory compliance in pharmaceutical, cosmetic, food, and advanced materials R&D and QC environments. Its architecture supports both routine single-point viscosity measurements and advanced rheological profiling—including thixotropy recovery, creep compliance, and time-dependent gelation kinetics—without hardware reconfiguration.

Key Features

• 7-inch full-color capacitive touchscreen interface with intuitive, icon-driven navigation and real-time graphical visualization of torque, viscosity, shear rate, and temperature
• Integrated Peltier temperature control system (±0.1 °C accuracy) with embedded Pt100 probe directly immersed in the sample cup for precise thermal feedback
• Onboard 150 MB non-volatile memory storing timestamped test files (date/time stamped per ICH E6(R3) and ALCOA+ data integrity principles)
• Dual operational modes: Standard Edition and Regulatory Edition—latter fully compliant with FDA 21 CFR Part 11 and GAMP 5 requirements
• Regulatory Edition includes role-based user access control, electronic signatures, immutable PDF report generation, and comprehensive audit trail with event-level granularity (user action, timestamp, parameter change, file export)
• Built-in mathematical models (Bingham, Herschel-Bulkley, Casson, Power Law) for automated yield stress and flow curve fitting
• Programmable QC limits, configurable alarms, and pass/fail logic for automated release testing in GMP environments
• Optional accessories include barcode scanner, LIMS interface module, label printer, Luer-lock sample inlet/purge ports, and gel-time-specific couplers

Sample Compatibility & Compliance

The DVNext CP accommodates standard 25 mm and 40 mm diameter cone geometries (e.g., CP-40, CP-51, CP-52), enabling measurement across a broad dynamic range—from Newtonian solvents (0.1 mPa·s) to highly filled pastes and gels (up to 7.8 M mPa·s). Its sealed sample chamber minimizes solvent evaporation and enables testing of volatile or air-sensitive formulations. All regulatory-grade firmware and software modules are validated per IQ/OQ protocols aligned with ASTM D2196, ISO 3219, and USP . The Regulatory Edition meets data integrity requirements outlined in FDA Guidance for Industry (2022), MHRA GXP Data Integrity Principles, and EU Annex 11—supporting full traceability from raw sensor output to final signed report.

Software & Data Management

RheocalcT™ software (Windows-based) provides synchronized instrument control, advanced data analysis, and secure report generation. It supports multi-user environments with hierarchical permissions, encrypted database logging, and electronic signature workflows compliant with 21 CFR Part 11 Subpart B. Audit trails record all critical events—including method edits, calibration updates, result overrides, and export actions—with tamper-evident hashing. Raw data exports adhere to ASTM E2500-22 format, including metadata headers (instrument ID, operator, environmental conditions, geometry specs). For enterprise integration, optional OPC UA and HL7 interfaces enable bidirectional communication with LIMS (e.g., LabWare, Thermo Fisher SampleManager) and MES platforms.

Applications

• Pharmaceutical: Yield stress assessment of topical gels, suspension stability profiling, injectable viscosity screening per USP
• Personal Care: Texture evaluation of toothpastes, shampoos, and sunscreens; thixotropic recovery quantification for pump-dispensed formulations
• Food Science: Gelation onset timing in dairy desserts, starch pasting behavior, and fat crystal network strength in margarines
• Materials R&D: Curing kinetics of UV/thermal adhesives, filler dispersion homogeneity in conductive inks, and rheopexy in smart fluid suspensions
• Quality Control: Batch-to-batch consistency verification against pre-defined QC ranges with automated flagging of out-of-spec results

FAQ

What distinguishes the Cone-Plate geometry from other rheometer configurations?
The cone-plate design delivers uniform shear rate distribution and minimal edge effects, making it ideal for measuring yield stress and low-viscosity Newtonian fluids with high reproducibility—especially where sample volume is limited.
Is temperature calibration traceable to NIST standards?
Yes—the integrated Pt100 probe is factory-calibrated against NIST-traceable references, and users may perform periodic verification using certified thermostats per ISO/IEC 17025 procedures.
Can the DVNext CP generate 21 CFR Part 11-compliant reports without external software?
Yes—the Regulatory Edition generates signed, password-protected PDF reports with embedded audit trail summaries directly from the instrument’s onboard system.
How does the instrument handle non-Newtonian samples during yield stress determination?
It employs controlled stress ramping with real-time torque detection, applying the Herschel-Bulkley model to extract yield point, flow index, and consistency coefficient—all calculated in accordance with ASTM D4442.
What validation documentation is supplied with the Regulatory Edition?
Each unit ships with Factory Acceptance Test (FAT) report, Installation Qualification (IQ) template, and Operational Qualification (OQ) protocol aligned with GAMP 5 Annex A, plus electronic copies of all firmware revision histories and cybersecurity risk assessments.