Brookfield TT-100 Online Viscometer

Overview

The Brookfield TT-100 Online Viscometer is an industrial-grade, continuous-process rotational viscometer engineered for real-time viscosity monitoring in demanding production environments. It operates on the fundamental principle of Couette flow rheology—measuring torque required to rotate a cylindrical rotor concentrically within a stationary stator at a precisely controlled angular velocity. This geometry ensures well-defined shear rate conditions across the annular gap, enabling reproducible and traceable viscosity measurements under dynamic process flow. Designed for integration into closed-loop control systems, the TT-100 delivers a linear 4–20 mA analog output proportional to dynamic viscosity (mPa·s or cP), synchronized with process variables including temperature, pressure, and flow rate. Its robust mechanical architecture supports operation across wide operational envelopes: pressures up to 10 MPa (1,450 psi), temperatures from −20 °C to +150 °C (with optional high-temp variants), and shear rates adjustable from 10 to 10,000 s⁻¹—including compliance with API RP 13B-1 standard shear rate of 511 s⁻¹ for drilling fluid characterization.

Key Features

• True inline measurement capability with no sample diversion or bypass loop required
• Couette-type coaxial cylinder sensor geometry ensuring stable, laminar shear field and minimal wall-slip error
• Integrated torque transduction system with high-stability strain gauge sensing element and thermal compensation
• Hermetically sealed, explosion-proof (optional ATEX/IECEx Zone 1 certification) housing rated for hazardous area installation
• Modular drive motor assembly with brushless DC motor and precision encoder feedback for speed regulation
• Dedicated flush port and vent screw enabling in-situ cleaning and air purge without process shutdown
• Thermal equilibrium design minimizing transient drift during rapid temperature transitions
• Stainless steel 316L wetted parts compliant with FDA 21 CFR Part 11 and GMP cleanability requirements

Sample Compatibility & Compliance

The TT-100 accommodates Newtonian and non-Newtonian fluids—including polymer melts, asphalt binders, latex emulsions, lubricants, crude oil blends, and water-based drilling muds—without requiring dilution or pre-conditioning. Its annular measurement cavity (sample chamber) provides representative bulk-phase response under actual pipeline flow conditions. The instrument meets ISO 2555 (viscosity determination by rotational methods), ASTM D2196 (non-Newtonian fluids), and API RP 13B-1 (drilling fluid rheology). For regulated industries, it supports audit-ready data logging with time-stamped calibration events, user access controls, and electronic signature functionality aligned with 21 CFR Part 11 and EU Annex 11 requirements.

Software & Data Management

While the TT-100 operates autonomously via its 4–20 mA output, optional Brookfield ViscoLink™ Process Interface Module enables digital communication via Modbus RTU/TCP or HART 7 protocols. This module facilitates remote configuration, real-time diagnostic monitoring (e.g., motor current, bearing temperature, signal noise floor), and automatic zero/span verification routines. All calibration coefficients, sensor ID, firmware version, and maintenance history are stored in non-volatile memory with write-protection. Data export conforms to CSV and OPC UA standards, supporting integration into MES (Manufacturing Execution Systems) and SCADA platforms for statistical process control (SPC) and predictive maintenance analytics.

Applications

• Continuous quality assurance in polymer extrusion and compounding lines
• Real-time rheological profiling of bitumen and modified asphalt during hot-mix production
• Viscosity control in paint, ink, and coating formulation reactors
• In-line monitoring of fermentation broths and biopharmaceutical cell culture media
• Drilling fluid rheology management in offshore and onshore oilfield operations
• Monitoring of edible oil refining processes (degumming, neutralization, deodorization)
• Process validation and consistency tracking in food paste and dairy concentrate manufacturing

FAQ

What shear rate does the TT-100 operate at by default?

The TT-100 is configurable across a defined shear rate range; however, its factory-default setting for petroleum applications aligns with API RP 13B-1 at 511 s⁻¹.
Can the TT-100 be calibrated in situ without removing it from the pipeline?

Yes—using the integrated flush port and certified reference oils, full span calibration can be performed online with traceable NIST-traceable standards.
Is the TT-100 compatible with sanitary (3A) process connections?

Standard configurations use ANSI/ISO flanged interfaces; tri-clamp (3A) and DIN 11851 sanitary variants are available upon request.
Does the instrument support temperature compensation for viscosity readings?

Yes—integrated Pt100 RTD sensors provide real-time temperature feedback, and viscosity values are automatically corrected using user-defined or ASTM-standard temperature-viscosity correlation models.
What is the typical response time for a viscosity change detection?

The system achieves 90% step response in ≤2 seconds under turbulent flow conditions, with signal filtering options to suppress high-frequency noise in pulsating flows.