Marimex ViscoScope® VA-300X-ST Online Rotational Viscometer
| Brand | Marimex |
|---|---|
| Origin | Germany |
| Model | VA-300X-ST |
| Measurement Range | 100–2,500,000 mPa·s·g/cm³ |
| Sensor Material | 1.4571 / 1.4404 (316Ti / 316L stainless steel) |
| Process Temperature | −10 °C to +130 °C (integrated Pt100 RTD) |
| Maximum Process Pressure | up to 64 bar (vacuum to positive pressure, configuration-dependent) |
| Fluid Velocity Tolerance | up to 5 m/s (installation-dependent) |
| Sensor Dimensions | Ø32 mm × 145 mm |
| Compliance | Designed for continuous industrial process monitoring in regulated environments |
Overview
The Marimex ViscoScope® VA-300X-ST is a high-range, inline rotational viscometer engineered for real-time, continuous viscosity monitoring in demanding industrial process streams. Operating on the principle of torsional resonant oscillation—where a precisely calibrated sensor element immersed in the process fluid experiences damping proportional to dynamic viscosity—the VA-300X-ST delivers stable, drift-free measurements without moving parts or mechanical bearings. Unlike capillary or falling-ball methods, this technology enables direct insertion into pressurized, flowing pipelines with minimal disruption to flow dynamics. Its design targets applications where viscosity spans six orders of magnitude (100–2,500,000 mPa·s·g/cm³), including polymer melt processing, high-solids slurry handling, and concentrated pharmaceutical suspensions. The integrated Pt100 temperature sensor ensures simultaneous, co-located temperature compensation per ASTM D2983 and ISO 2555, supporting accurate kinematic-to-dynamic viscosity correlation when density data is available.
Key Features
- Robust 316Ti/316L stainless steel sensor housing (material grades 1.4571 / 1.4404) certified for aggressive chemical exposure and CIP/SIP compatibility
- Hermetically sealed, intrinsically safe electronics rated for Zone 1/21 hazardous areas (ATEX/IECEx optional)
- Zero-maintenance resonant sensor architecture—no bearings, seals, or rotating shafts subject to wear or fouling
- Wide operational temperature range (−10 °C to +130 °C) with embedded Pt100 Class A RTD for real-time thermal correction
- Pressure-rated up to 64 bar (928 psi), configurable with flanged, sanitary tri-clamp, or threaded process connections (DIN 11851, ASME B16.5, ISO 2852)
- Digital output via 4–20 mA HART, Modbus RTU/TCP, or Profibus DP-V1 for seamless integration into DCS/SCADA systems
Sample Compatibility & Compliance
The VA-300X-ST is validated for use with non-Newtonian, shear-thinning, and thixotropic fluids commonly encountered in chemical synthesis, food extrusion, and biopharmaceutical manufacturing. It maintains measurement integrity under turbulent flow conditions (up to 5 m/s) when installed per ISO 20565 guidance on inline sensor placement. All wetted materials comply with FDA 21 CFR Part 177, EC 1935/2004, and USP <88> Class VI biocompatibility testing. The instrument supports audit-ready operation in GMP/GLP environments through configurable data logging, user access levels, and electronic signature capability aligned with FDA 21 CFR Part 11 requirements. Calibration traceability follows ISO/IEC 17025 via accredited third-party laboratories using NIST-traceable reference oils.
Software & Data Management
The VA-300X-ST interfaces with Marimex’s ViscoLink™ configuration and diagnostics software (Windows-based, TLS 1.2 encrypted), enabling remote setup, real-time trend visualization, alarm thresholding, and batch-wise data export in CSV or XML format. Firmware updates preserve backward compatibility and include built-in self-diagnostics (sensor resonance frequency validation, temperature offset verification, signal-to-noise ratio monitoring). Historical data can be synchronized with MES platforms via OPC UA, supporting predictive maintenance analytics and SPC charting per ISO 7870-2. Optional cloud gateway modules provide secure MQTT-based telemetry for centralized fleet monitoring across multi-site operations.
Applications
- Continuous monitoring of epoxy resin curing kinetics during composite prepreg production
- Real-time control of starch gelatinization viscosity in beverage concentrate lines
- In-line quality assurance of monoclonal antibody formulations during ultrafiltration/diafiltration
- Feedback control of asphalt binder consistency in hot-mix asphalt plants
- Viscosity profiling of lithium-ion battery cathode slurries prior to coating
- Process endpoint detection in solvent-based polymer precipitation reactors
FAQ
Is the VA-300X-ST suitable for sanitary applications in food and pharma?
Yes—configured with 3A-certified tri-clamp fittings and electropolished 1.4404 (316L) surfaces, it meets 3-A SSI Standard 74-01 and complies with EHEDG Doc. Type EL (Equipment Design).
Can it measure viscosity in highly abrasive slurries?
The hardened 316Ti sensor tip (1.4571) provides enhanced erosion resistance; however, prolonged exposure to >20 wt% solids with particles >100 µm may require optional tungsten carbide wear sleeves.
Does the device require periodic recalibration?
No scheduled recalibration is mandated; however, annual verification against traceable reference standards is recommended per ISO 17025 and internal QA protocols.
How is temperature compensation implemented?
The integrated Pt100 RTD measures fluid temperature at the sensor surface in real time, and the firmware applies a two-point polynomial correction derived from Marimex’s proprietary viscosity–temperature database for common process fluids.
What installation orientation is required?
Vertical or angled downward installation is preferred to prevent air entrapment; horizontal mounting is permissible if flow velocity exceeds 0.3 m/s and upstream straight-pipe length ≥10× pipe diameter.
