ATAGO NAR-1T LIQUID Benchtop High-Temperature Digital Refractometer
| Brand | ATAGO |
|---|---|
| Origin | Japan |
| Model | NAR-1T LIQUID |
| Type | Benchtop Refractometer |
| Temperature Control | Yes |
| Digital Display | Yes |
| Refractive Index (nD) Range | 1.3000–1.7000 |
| Brix Range | 0.0–95.0% |
| Operating Temperature Range | 5–50 °C |
Overview
The ATAGO NAR-1T LIQUID is a precision benchtop digital refractometer engineered for accurate, repeatable measurement of refractive index (nD) and Brix concentration in high-temperature liquid samples—particularly those encountered in distillation, thermal processing, petrochemical refining, and high-boiling-point solvent analysis. Unlike conventional Abbe-type refractometers requiring manual scale reading and ambient-temperature operation, the NAR-1T LIQUID integrates Peltier-based temperature control and high-stability optical detection to maintain sample temperature at user-defined setpoints (within 5–50 °C), minimizing thermal drift and ensuring metrological consistency across viscous or thermally sensitive media. Its optical architecture employs a monochromatic sodium-D line (589.3 nm) light source and a high-resolution prism interface calibrated per ISO 21748 and ASTM D1218 standards, delivering traceable nD values with resolution of 0.0001 and Brix resolution of 0.1%. Designed for integration into QC laboratories operating under GLP or GMP frameworks, the instrument supports temperature-compensated reporting and conforms to JIS K 0061 for refractometric methodology.
Key Features
- Peltier-controlled thermostatic stage enabling precise sample temperature regulation from 5 °C to 50 °C (±0.2 °C stability), critical for reproducible measurements of hot distillates, molten polymers, and steam-condensed fractions
- Dual-parameter output: simultaneous real-time display of refractive index (nD) and Brix (% w/w), with automatic internal conversion based on validated calibration curves
- High-durability sapphire prism surface resistant to abrasion and chemical attack from aggressive solvents, acids, and hydrocarbons
- Compact benchtop footprint (240 × 220 × 180 mm) with ergonomic sample chamber design accommodating up to 0.5 mL volume—optimized for minimal sample consumption and rapid thermal equilibration
- Auto-zero function and built-in reference validation using distilled water or certified standard fluids, supporting daily verification per ISO/IEC 17025 requirements
- RS-232 interface for external data logging and optional PC connectivity; compatible with ATAGO’s optional Data Management Software for audit-trail generation
Sample Compatibility & Compliance
The NAR-1T LIQUID is validated for use with transparent to mildly turbid liquids exhibiting low to moderate viscosity (< 500 mPa·s), including but not limited to: distilled aqueous fractions, ethylene glycol/water mixtures, hot crude oil cuts, pharmaceutical syrups, concentrated fruit extracts, and high-boiling organic solvents (e.g., dimethyl sulfoxide, glycerol, propylene carbonate). It complies with international refractometry standards including ISO 21748 (accuracy verification of refractometers), ASTM D1218 (refractive index of hydrocarbon liquids), and JIS K 0061 (general methods for refractometric analysis). Temperature-controlled operation ensures compliance with USP guidelines for controlled-condition physicochemical testing, and its stable thermal platform supports method validation under ICH Q2(R2) principles.
Software & Data Management
While the NAR-1T LIQUID operates as a standalone instrument with full local readout, it supports traceable data capture via RS-232 serial output. When paired with ATAGO’s optional Data Management Software (v3.2+), users can configure automated acquisition protocols, assign sample IDs, record operator metadata, and generate time-stamped reports compliant with FDA 21 CFR Part 11 requirements—including electronic signatures, audit trails, and data integrity safeguards. All measurement records include embedded environmental parameters (actual prism temperature, ambient humidity, calibration timestamp), facilitating retrospective review during regulatory inspections or internal quality audits.
Applications
- Real-time monitoring of distillation endpoint in essential oil extraction and ethanol purification processes
- Concentration verification of heat-stable API solutions prior to lyophilization or hot-fill packaging
- Quality control of high-temperature lubricants and thermal transfer fluids in power generation and manufacturing
- Brix and solids content validation in concentrated food matrices processed above ambient temperature (e.g., caramelized syrups, reduced fruit purees)
- Refractive index profiling of polymer precursor solutions during thermal curing or solvent evaporation studies
- Calibration support for inline process refractometers deployed in continuous distillation columns
FAQ
Does the NAR-1T LIQUID require external cooling water for temperature control?
No—the integrated Peltier element enables both heating and cooling without auxiliary utilities; only standard AC power is required.
Can it measure opaque or highly viscous samples?
It is optimized for transparent to slightly hazy liquids with viscosity below 500 mPa·s; particulate-laden or gel-phase samples are not suitable due to optical path constraints.
Is NIST-traceable calibration available?
Yes—ATAGO provides optional factory-certified calibration using NIST-traceable refractive index standards (SRM 1797 series), documented with uncertainty budgets per ISO/IEC 17025.
What is the warm-up time to reach thermal equilibrium at 45 °C?
Approximately 8–12 minutes from ambient (25 °C), depending on ambient conditions and sample volume.
Does the instrument support custom calibration curves for non-Brix solutes?
No—Brix mode assumes sucrose-equivalent calibration; for other solutes (e.g., NaCl, ethylene glycol), users must apply empirically derived correlation tables or third-party conversion software.
