Brookfield TT-100 In-Line Viscometer

Overview

The Brookfield TT-100 In-Line Viscometer is an industrial-grade, continuous-process viscometer engineered for real-time rheological monitoring in dynamic fluid systems. Based on the Couette flow principle—where fluid resides in the annular gap between a rotating outer cylinder and a stationary inner cylinder—the TT-100 delivers viscosity measurements under a precisely defined, constant shear rate of 511 s⁻¹. This fixed-shear configuration ensures direct comparability with standard laboratory-based Brookfield rotational viscometry results conducted per API RP 13B-1 (for drilling fluids) and ASTM D2196 (for non-Newtonian paints and coatings). Unlike batch sampling methods, the TT-100 eliminates human intervention and sample handling errors, enabling uninterrupted process feedback for closed-loop control, quality assurance, and early anomaly detection in continuous manufacturing environments.

Key Features

• Fixed-shear Couette geometry calibrated to 511 s⁻¹—ensuring traceable correlation with Brookfield benchtop viscometers and industry-standard test protocols
• Robust stainless-steel wetted components compatible with aggressive chemical environments, high-pressure piping (up to ANSI Class 300), and elevated process temperatures (with optional cooling jackets)
• Modular installation architecture supporting tri-clamp sanitary fittings, NPT threads, or ANSI/ISO flanges for seamless integration into existing pipelines
• Field-configurable 4–20 mA analog output with HART® protocol support for direct interfacing with DCS, PLC, and SCADA systems
• Explosion-proof variants available with full IECEx Zone 1, ATEX II 2G Ex db IIB T4 Gb, and UL/cUL Class I Division 1 Group B, C, D certifications for hazardous area deployment
• Low-maintenance design with accessible rotor assembly and no internal seals exposed to process media—reducing downtime and calibration drift over extended service intervals

Sample Compatibility & Compliance

The TT-100 is validated for use across non-settling, single-phase Newtonian and pseudo-plastic fluids—including polymer melts, latex emulsions, solvent-based inks, oil-based muds, and food-grade syrups—provided particulate loading remains below 15 vol% and particle size is <100 µm to prevent rotor interference. It complies with ISO 2555 (viscosity determination by rotational methods), ASTM D1084 (adhesive viscosity), and USP (viscosity of pharmaceutical gels and suspensions) when operated within its specified shear-rate envelope. For regulated industries, the instrument supports 21 CFR Part 11-compliant data logging when paired with Brookfield’s optional ViscoLink™ software and audit-trail-enabled controllers.

Software & Data Management

While the TT-100 operates as a stand-alone analog transmitter, it integrates seamlessly with Brookfield’s ViscoLink™ Process Edition—a Windows-based platform enabling remote configuration, real-time trend visualization, alarm thresholding, and automated report generation. All measurement events—including calibration timestamps, sensor diagnostics, and signal stability metrics—are time-stamped and exportable in CSV or PDF formats. The system supports electronic signature workflows and user-access-level controls aligned with GLP and GMP documentation requirements. No proprietary drivers are required; communication occurs via standard Modbus RTU or analog current loop interfaces.

Applications

• Real-time viscosity control in polymer extrusion and compounding lines to maintain melt index consistency
• In-line monitoring of drilling fluid rheology during oil & gas well construction to ensure yield point and gel strength compliance
• Continuous QC of coating formulations in automotive and coil coating plants to prevent spray atomization defects
• Process validation of topical pharmaceutical gels and ointments during filling operations per FDA guidance
• Feedback control of starch-thickened food products (e.g., sauces, dressings) to meet texture specifications without offline lab delay
• Monitoring of biofermentation broths where viscosity correlates with cell density and metabolic activity

FAQ

Is the TT-100 suitable for abrasive or highly particulate slurries?
No—it is not recommended for slurries containing >15 vol% solids or particles exceeding 100 µm in diameter, as these may cause mechanical wear or torque instability in the Couette gap.
Can the shear rate be adjusted in the field?
The standard TT-100 operates exclusively at 511 s⁻¹. A variable-speed motor option (TT-100-VS) is available for applications requiring shear-rate sweeps, but requires external controller integration and recalibration per ISO 16520.
Does the unit require periodic recalibration against reference oils?
Yes—annual verification using NIST-traceable viscosity standards (e.g., Cannon-Fenske certified oils) is recommended. Calibration certificates are issued per ISO/IEC 17025 by authorized Brookfield service centers.
What is the maximum allowable process pressure and temperature?
Standard models support up to 10 bar (145 psi) and 120 °C. High-pressure and high-temperature variants (up to 40 bar / 200 °C) are available upon request with modified housing and thermal isolation.
How does the TT-100 handle air entrainment or foam in the process stream?
Foam and entrained gas significantly affect torque transmission in Couette geometry. Installation must ensure full liquid fill and upstream degassing; vertical orientation with top-entry flow is strongly advised.