Anton Paar L-Rix 4100/5100/5200 Online Refractometer
| Brand | Anton Paar |
|---|---|
| Origin | Austria |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Product Category | Imported Instrument |
| Model | L-Rix 4100 / L-Rix 5100 / L-Rix 5200 |
| Refractive Index Range | 1.31–1.54 |
| Accuracy | ±0.0002 nD (equivalent to ±0.1% w/w) |
| Temperature Control Range | −20 °C to 120 °C |
| Wetted Materials | Stainless Steel 1.4404, PEEK, Sapphire (Al₂O₃ – 99.997%), EPDM O-ring 60×3 (VARIVENT N, Shore A 70) |
Overview
The Anton Paar L-Rix 4100/5100/5200 Online Refractometer is an industrial-grade process analytical instrument engineered for continuous, high-precision refractive index measurement in real time. Based on the principle of critical angle refraction at a solid–liquid interface, the system employs a monochromatic LED light source (589 nm) and a high-resolution CMOS linear sensor (2048 pixels) to determine the refractive index (nD) of process fluids with metrological traceability to primary standards. This optical method enables direct, non-invasive concentration determination—correlating refractive index to mass fraction (e.g., % w/w sucrose, NaOH, ethanol, glycol, or organic solvents) without sample extraction, reagent consumption, or moving parts. Designed for integration into hygienic and demanding industrial environments—including food & beverage, pharmaceuticals, chemical synthesis, and bioprocessing—the L-Rix series delivers laboratory-grade accuracy under dynamic process conditions, supporting closed-loop control, batch release verification, and PAT (Process Analytical Technology) compliance per ICH Q8/Q9/Q10 frameworks.
Key Features
- Maintenance-free operation: No consumables, no recalibration required during service life; factory-set calibration remains stable over years due to thermally compensated optics and drift-resistant sapphire prism assembly.
- Hygienic CIP/SIP compatibility: Withstands cleaning-in-place (CIP) and sterilization-in-place (SIP) cycles up to 145 °C for 30 minutes; validated for FDA 21 CFR Part 11–compliant environments when paired with Edge 7000/5000 controllers.
- Robust mechanical architecture: IP67/NEMA 6P-rated housing; pressure-rated up to 16 bar (abs) at ≤120 °C; VARIVENT® N and Tri-Clamp® 3″ process connections ensure GMP-compliant sealing integrity.
- Multi-tier precision options: L-Rix 4100 (±0.0002 nD), L-Rix 5100 (±0.0002 nD, extended range), and L-Rix 5200 (±0.0001 nD, ultra-high repeatability ±0.00005 nD) support application-specific accuracy requirements.
- Integrated temperature compensation: Built-in Pt-100 sensor provides real-time thermal correction across the full operating range (−20 °C to 120 °C), ensuring nD values remain referenced to 20 °C per ISO 21147 and ASTM D1218.
Sample Compatibility & Compliance
The L-Rix series measures transparent to mildly turbid liquids with minimal particulate load (<5 µm). Wetted materials—including 1.4404 stainless steel, medical-grade PEEK, and 99.997% pure sapphire (Al2O3)—are certified compliant with USP Class VI, EC 1935/2004, and FDA 21 CFR 177.2415 for food contact and pharmaceutical use. O-rings meet VARIVENT N specification with EPDM (Shore A 70) for broad chemical resistance. The instrument supports validation protocols aligned with Annex 11 (EU GMP), FDA Guidance for PAT, and ISO/IEC 17025 accreditation requirements. Full diagnostic reporting adheres to NAMUR NE 107 standard status categories (BAD, MAINT, WARN, OK), enabling predictive maintenance integration within MES/SCADA systems.
Software & Data Management
L-Rix 5100/5200 models feature embedded evaluation units with intuitive touchscreen interfaces (via Pico 3000 software or Edge 7000/5000 controllers), supporting audit-trail-enabled configuration, user-level access control, and timestamped measurement logging. All variants offer dual-mode communication: analog (4–20 mA) plus digital protocols including Modbus RTU/TCP, PROFIBUS DP, PROFINET IO, and EtherNet/IP—enabling seamless integration with DCS, PLC, and LIMS platforms. Data export complies with CSV/Excel formats for trending and SPC analysis; optional firmware upgrades maintain alignment with evolving regulatory expectations for electronic records (21 CFR Part 11 Subpart B).
Applications
- Real-time sugar concentration monitoring in juice, syrup, and confectionery production (Brix tracking per ISO 2173)
- In-line NaOH/KOH titration endpoint detection in caustic cleaning validation
- Continuous ethanol/water ratio control in distillation and fermentation
- Glycol concentration verification in heat transfer fluid loops and HVAC systems
- API crystallization endpoint detection via solvent composition shift
- Batch-to-batch consistency verification in vaccine adjuvant formulation
FAQ
Does the L-Rix require periodic recalibration?
No—factory calibration is permanently stored and thermally stabilized; no field recalibration is needed under normal operating conditions.
Can the sensor be installed in vertical or horizontal pipe orientations?
Yes—full 360° mounting flexibility is supported; flow velocity recommendations (0.3–3 m/s) apply regardless of orientation.
Is the sapphire prism resistant to hydrofluoric acid (HF)?
No—HF etches sapphire; alternative wetted material consultation with Anton Paar Application Engineering is required for HF-containing media.
How is temperature uniformity ensured across the measurement prism surface?
The integrated Pt-100 sensor is positioned adjacent to the sapphire–process fluid interface, enabling localized thermal compensation independent of bulk fluid temperature gradients.
What cybersecurity features are implemented for Ethernet-connected models?
Edge 7000/5000 controllers support TLS 1.2 encryption, role-based authentication, and configurable firewall rules compliant with IEC 62443-3-3 SL2 requirements.
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