Brookfield DV2T Advanced Rotational Viscometer

Overview

The Brookfield DV2T is a precision-engineered benchtop rotational viscometer designed for routine quality control, R&D, and production testing across pharmaceuticals, cosmetics, food, paints, adhesives, and polymer industries. It operates on the principle of controlled shear rate measurement via coaxial cylinder (Couette) flow geometry: torque generated by viscous resistance to rotor rotation at defined angular velocity is converted into dynamic viscosity (mPa·s or cP) using calibrated rotor constants. The instrument delivers high reproducibility under ISO 2555 and ASTM D2196-compliant conditions, supporting both single-point and multi-step rheological profiling. Its modular architecture accommodates LV, RV, HA, and HB spindle families—enabling coverage from ultra-low-viscosity liquids (1 mPa·s with ULA adapter) to highly structured pastes and gels (up to 320 million mPa·s with HB-1 spindle). Built-in temperature sensing via Pt100 RTD ensures thermal context for viscosity reporting, critical for temperature-dependent materials per USP and ICH Q5C guidelines.

Key Features

• 5-inch capacitive touchscreen interface with intuitive icon-driven navigation, real-time trend graphs, and multilingual display support (English, Spanish, French, German, Chinese)
• 200-step programmable speed control (0.01–200 rpm) with automatic range detection and dynamic torque compensation
• FDA 21 CFR Part 11–compliant security framework: role-based user authentication, password-protected access levels, electronic signatures, and immutable audit trails for all test executions and parameter changes
• Onboard data management: time-stamped results storage (up to 1,000 readings), QC pass/fail thresholds with visual alerts, and customizable averaging (3–99 readings per point)
• EZ-Lock quick-connect spindle system with automatic recognition of LV/RV/HA/HB geometry—reducing setup error and calibration drift
• Integrated bubble level and ergonomic tilt-adjustable stand (Model G) for consistent sample alignment and measurement repeatability
• USB host port enabling direct connection to PC for firmware updates, program uploads, and external data export without proprietary cables

Sample Compatibility & Compliance

The DV2T supports standard cylindrical spindles (LV: 6-spindle set; RV/HA/HB: 4-spindle set), plus optional accessories including the Small Sample Adapter (SSA), Ultra-Low Viscosity Adapter (ULA), Thermosel Peltier heater, Helipath T-bar stand, and DIN compliance fixtures. It meets ISO 2555 (single-speed viscosity), ASTM D1200 (Ford cup correlation), and ASTM D2196 (non-Newtonian behavior assessment) test protocols. For regulated environments, its software-controlled validation mode supports IQ/OQ documentation per GMP Annex 11 and GLP requirements. All stored data include metadata: operator ID, timestamp, environmental temperature, spindle ID, rotational speed, % torque, and shear stress calculation—ensuring traceability in FDA inspections.

Software & Data Management

Two complementary software packages are provided: PG Flash (included) and RheocalcT (standard in China). PG Flash enables offline creation of up to 25-step automated test sequences—including variable speed ramps, dwell times, and conditional logic—saved to USB flash drive and deployed across multiple DV2T units. RheocalcT provides advanced post-processing: overlay of up to five datasets, mathematical modeling (Bingham, Herschel-Bulkley, Power Law, Casson), thixotropy index calculation, and automated report generation compliant with 21 CFR Part 11 digital signature workflows. Both tools enforce secure user sessions, encrypted local database storage, and export to CSV, PDF, or Excel formats without loss of metadata integrity.

Applications

• Pharmaceutical suspensions and ointments: yield stress determination and temperature-dependent viscosity mapping per USP
• Food emulsions (mayonnaise, dressings): stability assessment via hysteresis loop analysis and thixotropic recovery timing
• Paints and coatings: sag resistance evaluation through low-shear viscosity at 0.1 rpm and high-shear thinning at 100 rpm
• Adhesives and sealants: open-time prediction using timed viscosity decay profiles
• Biopolymer solutions (xanthan, CMC): non-Newtonian index quantification and molecular weight correlation
• QC release testing in ISO 13485-certified medical device manufacturing facilities

FAQ

What spindle configurations are included with the DV2T base package?
The standard LV version ships with six spindles (LV#1–LV#6); RV/HA/HB versions include four spindles (RV#1–RV#4, HA#1–HA#4, or HB#1–HB#4), plus RTD temperature probe, protective leg, Model G stand, USB drive, stylus, cleaning cloth, and carrying case.
Can the DV2T perform yield stress measurements?
Yes—when paired with RheocalcT software and appropriate spindle geometry (e.g., vane or T-bar), it calculates yield values via controlled stress ramping or extrapolated flow curves per ASTM D4877 and ISO 3219.
Is temperature control integrated or external?
The DV2T includes an embedded RTD sensor for ambient temperature monitoring. For active thermal regulation, external accessories such as the Thermosel heater or circulating water bath must be used—both supported via analog input and software synchronization.
How does the DV2T ensure data integrity in regulated labs?
Through hardware-enforced write-once memory logging, timestamped operator authentication, electronic signature capture, and full audit trail export—all validated against FDA 21 CFR Part 11 Annex A and EU GMP Annex 11 requirements.
What is the minimum measurable viscosity with standard LV spindles?
Using LV#1 spindle at 60 rpm, the lower limit is ~15 mPa·s; with the optional Ultra-Low Viscosity Adapter (ULA), sensitivity extends down to 1 mPa·s across all LV spindles.