ATAGO RX-5000α Automatic Desktop Refractometer
| Brand | ATAGO |
|---|---|
| Origin | Japan |
| Model | RX-5000α |
| Measurement Principle | Abbe-type refractometry with automatic temperature control (Peltier) |
| Refractive Index Range | 1.32000–1.70000 nD |
| Brix Range | 0.0–100.0% |
| Refractive Index Accuracy | ±0.00004 nD |
| Brix Accuracy | ±0.03% |
| Temperature Control Range | 5–75°C |
| Temperature Accuracy | ±0.05°C |
| Compliance | FDA 21 CFR Part 11 (electronic records & signatures), ISO/IEC 17025 traceable operation, GLP/GMP-ready data audit trail |
Overview
The ATAGO RX-5000α Automatic Desktop Refractometer is a high-precision, Peltier-controlled laboratory instrument engineered for the accurate and repeatable measurement of refractive index (nD) and related concentration parameters—including Brix (°Bx), mass fraction of soluble solids, and custom concentration scales—across aqueous and non-aqueous liquid samples. Based on the Abbe refractometry principle, the instrument employs a high-stability LED light source, precision prism assembly, and real-time image analysis of the critical angle of total internal reflection to deliver metrologically traceable results. Unlike manual or water-bath-dependent refractometers, the RX-5000α integrates a bidirectional Peltier thermoelectric module that actively cools and heats the sample stage, enabling rapid, stable thermal equilibration without external chillers or recirculating baths. This architecture ensures compliance with ISO 21748 (guidance on uncertainty estimation in physical measurements) and supports routine calibration verification per ASTM D1218 and AOAC Official Method 932.12.
Key Features
- Automated Peltier temperature control (5–75°C) with ±0.05°C stability and programmable ramp profiles
- High-resolution digital detection system achieving ±0.00004 nD refractive index repeatability and ±0.03% Brix precision under controlled conditions
- FDA 21 CFR Part 11-compliant software suite with user access levels, electronic signatures, full audit trail, and encrypted data storage
- Self-diagnostic optical alignment verification and automatic prism cleaning cycle support
- Integrated USB and Ethernet interfaces for networked lab deployment and LIMS integration
- Multi-language GUI (English, Japanese, Chinese, Korean, Spanish, German) with customizable report templates (PDF, CSV, XML)
Sample Compatibility & Compliance
The RX-5000α accommodates a broad spectrum of liquid samples relevant to food science, beverage QC, pharmaceutical excipient analysis, and industrial chemical formulation—including fruit juices, syrups, dairy concentrates, glycerol-water mixtures, ethanol solutions, and plant extract infusions. Its sapphire prism surface resists scratching and corrosion from mildly acidic or alkaline matrices (pH 2–12). The instrument meets ISO/IEC 17025 requirements for testing laboratories when operated within validated SOPs, and its electronic record architecture satisfies regulatory expectations for data integrity under FDA, EMA, and PMDA guidelines. All measurement logs include timestamp, operator ID, calibration status, ambient temperature/humidity metadata, and raw sensor output—enabling full traceability during GLP or GMP audits.
Software & Data Management
ATAGO’s proprietary “RefractoSoft RX” software provides a secure, role-based interface for method development, calibration management, and statistical process monitoring. Users can define up to 100 custom concentration conversion curves (e.g., % w/w NaCl, % w/v citric acid, API solubility in co-solvent systems) using polynomial or spline interpolation based on reference standard data. The system automatically applies temperature compensation per ISO 2859-1 and stores calibration certificates with NIST-traceable reference fluid data. Audit logs capture every action—including parameter modification, result deletion, and signature application—with immutable timestamps. Data export supports 21 CFR Part 11-compliant PDF reports containing digital signatures, hash verification codes, and embedded calibration history.
Applications
- QC release testing of fruit juice Brix in accordance with Codex Alimentarius STAN 247-2005
- Concentration monitoring of sugar syrups during thermal processing (caramelization, evaporation)
- Stability assessment of emulsified oil-in-water systems via refractive index drift over time
- Verification of glycerin or propylene glycol content in pharmaceutical vehicle formulations
- In-process control of fermentation broths (e.g., ethanol yield estimation in bioethanol production)
- Validation of cleaning-in-place (CIP) rinse endpoints by detecting residual surfactant concentration
FAQ
Is the RX-5000α suitable for measuring non-sugar solutions such as salt brines or organic solvent mixtures?
Yes—the instrument measures absolute refractive index (nD) as a fundamental physical property; users may apply custom calibration curves for any solute-solvent system with documented nD vs. concentration relationships.
Does the system require annual recalibration by ATAGO service engineers?
No—routine user verification using certified ATAGO reference fluids (e.g., nD = 1.48000 ± 0.00002 at 20°C) satisfies ISO/IEC 17025 interim verification requirements; factory recalibration is recommended every 24 months or after mechanical shock.
Can measurement data be exported directly to SAP QM or LabWare LIMS?
Yes—via configurable ODBC drivers and HL7-compliant XML schema mapping, supporting automated data ingestion without manual re-entry.
What safety certifications does the unit hold for use in EU and North American laboratories?
CE marked per EN 61010-1:2019 (Safety requirements for electrical equipment), UL 61010-1 certified, and RoHS 3 compliant.
