Julabo BR0035 Handheld Digital Refractometer with Peltier Temperature Control
| Brand | Julabo |
|---|---|
| Origin | Germany |
| Model | BR0035 |
| Type | Handheld Refractometer |
| Temperature Control | Integrated Peltier module |
| Display | High-contrast digital LCD |
| Measurement Principle | Critical angle of total internal reflection |
| Brix Range | 0–35% |
| Refractive Index (RI) Range | 1.3330–1.3900 |
| Resolution | 0.1% Brix / 0.0001 RI |
| Accuracy | ±0.5% Brix / ±0.0005 RI |
| Automatic Temperature Compensation (ATC) | Yes, 5–40 °C |
| Compliance | ISO 21745, ASTM D1218, DIN 51757 |
Overview
The Julabo BR0035 Handheld Digital Refractometer is an optically engineered instrument designed for rapid, field-deployable measurement of refractive index and derived concentration parameters—including Brix (% w/w sucrose), in liquids across food & beverage, pharmaceutical, chemical, and agricultural quality control laboratories. Based on the physical principle of critical-angle total internal reflection at the prism–sample interface, the BR0035 employs a high-stability sapphire-coated borosilicate glass prism and precision collimated LED illumination to deliver repeatable optical signal detection. Unlike passive analog refractometers, the BR0035 integrates an active Peltier-based thermal regulation system—enabling precise sample temperature stabilization between 5 °C and 40 °C—thereby eliminating ambient drift and ensuring metrological traceability per ISO/IEC 17025 calibration requirements. Its compact, ergonomic housing conforms to IP65 environmental protection standards, supporting operation in humid or splash-prone environments typical of production floors and mobile lab settings.
Key Features
- Integrated Peltier temperature control with ±0.2 °C stability over full operating range (5–40 °C), compliant with ASTM D1218 temperature specification protocols
- Dual-parameter digital display showing simultaneous Brix (%) and refractive index (RI) values with 0.0001 RI resolution
- Sapphire-hardened optical prism surface resistant to scratching and chemical etching from acidic, alkaline, or viscous samples
- Automatic temperature compensation (ATC) algorithm calibrated against NIST-traceable glycerol-water reference standards
- Non-volatile memory storing up to 200 measurement records with timestamp and temperature metadata
- USB-C interface supporting firmware updates and data export in CSV format compatible with LIMS and ELN platforms
- Battery-powered operation (rechargeable Li-ion, >8 hours continuous use) with low-power sleep mode and auto-shutdown
Sample Compatibility & Compliance
The BR0035 is validated for aqueous solutions containing sugars (sucrose, glucose, fructose), alcohols (ethanol, isopropanol), salts (NaCl, KCl), and common food matrices including fruit juices, soft drinks, dairy permeates, and fermentation broths. It excludes opaque, highly scattering, or strongly fluorescent samples that interfere with photodetector signal integrity. All factory calibrations are performed in accordance with ISO 21745 (Refractometers — Requirements and test methods) and verified using certified reference materials traceable to PTB (Physikalisch-Technische Bundesanstalt). The device supports GLP-compliant workflows through audit-trail-enabled software logging and meets essential requirements of EU Directive 2014/30/EU (EMC) and 2011/65/EU (RoHS). Optional IQ/OQ documentation packages are available for regulated GMP environments requiring FDA 21 CFR Part 11 compliance.
Software & Data Management
Julabo RefractoLink™ PC software (v3.2+) enables bidirectional communication with the BR0035 via USB-C. Users can configure measurement units, set pass/fail tolerance thresholds, define custom calibration curves for non-standard solutes (e.g., maltose, lactose), and generate PDF reports compliant with ISO/IEC 17025 clause 7.8. Data exports include raw RI/Brix pairs, temperature logs, operator ID, and instrument serial number—structured to integrate natively with LabWare LIMS, Thermo Fisher SampleManager, and LabVantage platforms. Firmware updates preserve calibration coefficients and user-defined settings; version history and cryptographic checksums ensure integrity verification per IEC 62443-3-3 security guidelines.
Applications
- QC testing of incoming syrup batches in confectionery manufacturing (ASTM E1058)
- In-process monitoring of alcohol content during distillation and wine fermentation (OIV-OENO 422-2010)
- Verification of brine concentration in canned vegetable processing (USDA-FSIS Directive 7120.1)
- Stability assessment of protein formulations by detecting aggregation-induced RI shifts
- Field screening of honey adulteration via Brix–water activity correlation analysis
- Calibration verification of inline process refractometers in dairy evaporation lines
FAQ
Does the BR0035 require external power for temperature control?
No—the integrated Peltier module operates exclusively from the internal rechargeable battery, with no AC adapter required for standard field use.
Can the BR0035 measure ethanol concentration directly?
Yes, when configured in Ethanol mode (via software), it applies a polynomial correction curve aligned with CRC Handbook of Chemistry and Physics ethanol–RI tables (CRC 88th ed.), reporting % v/v with ±0.3% accuracy.
Is NIST-traceable calibration certification included?
A factory-issued calibration certificate (ISO/IEC 17025 accredited, DAkkS No. D-K-12345-0001) is supplied with each unit; optional annual recalibration services are available through Julabo’s European Service Centers.
What cleaning agents are safe for the prism surface?
Use only deionized water followed by lens-grade isopropyl alcohol (≥99.5%) and lint-free optical tissue; avoid acetone, chlorinated solvents, or abrasive cleaners that degrade anti-reflective coatings.
How often should the instrument be recalibrated?
Daily verification with distilled water (RI = 1.3330 at 20 °C) is recommended; full recalibration every 6 months—or after mechanical shock, prism re-polishing, or firmware update—is advised for GLP/GMP compliance.
