ATAGO MASTER-HONEY/BX Honey Moisture and Brix Refractometer

Overview

The ATAGO MASTER-HONEY/BX is a precision handheld refractometer engineered specifically for the quantitative assessment of moisture content and soluble solids (expressed as °Brix) in raw, processed, and blended honey. It operates on the fundamental optical principle of critical angle refraction: when a beam of light passes from a prism into a honey sample, the degree of bending—governed by the sample’s refractive index—is directly correlated to its water concentration and sugar density. This relationship is empirically calibrated using internationally recognized honey-specific reference standards (e.g., AOAC Official Method 969.37, ISO 21527-1:2008), enabling traceable, repeatable measurements without chemical reagents or sample dilution. Unlike general-purpose refractometers, the MASTER-HONEY/BX incorporates a dual-scale optical system optimized for the unique refractive behavior of high-viscosity, thermally sensitive honey matrices across the physiologically relevant range of 58–90% moisture (10–42°Brix). Its integrated temperature compensation (ATC) ensures stable readings between 10–40°C, eliminating manual correction and reducing operator-induced variability.

Key Features

• Dual-scale optical scale engraved directly on the reticle: simultaneous visual readout of moisture content (%) and °Brix, pre-calibrated to the honey-specific inverse correlation curve (per Codex Alimentarius Standard CXS 12-1981).
• Automatic Temperature Compensation (ATC) mechanism using a bimetallic thermal element, maintaining measurement integrity across ambient laboratory or field conditions (10–40°C).
• Digital display option (model variant MASTER-HONEY/BX-D) provides illuminated LCD readout with unit toggle (moisture % / °Brix), zero-point calibration confirmation, and auto-power-off after 3 minutes of inactivity.
• Robust aluminum alloy body with anti-scratch sapphire prism surface, rated IP65 for dust and water resistance—suitable for use in packing lines, apiary labs, and customs inspection zones.
• No battery required for analog operation; digital variant uses two AAA batteries with >10,000 measurements per set under typical usage.

Sample Compatibility & Compliance

The MASTER-HONEY/BX is validated for direct application to unfiltered, warmed (≤40°C), and non-crystallized honey samples with viscosities up to 15,000 cP. Crystallized or highly granulated samples must be gently warmed to ≥35°C and homogenized prior to measurement to ensure representative sampling. The instrument complies with metrological requirements outlined in ISO 21527-1 (Microbiology of food and animal feeding stuffs — Horizontal method for the enumeration of yeasts and molds) for honey quality screening, and supports adherence to national honey standards including EU Directive 2001/110/EC, USDA Grade Standards for Honey, and China GB 14963–2014. While not a standalone compliance device, its measurements are admissible as part of documented quality control procedures under GLP and HACCP frameworks when accompanied by instrument calibration records (traceable to NIST-traceable sucrose solutions) and operator training logs.

Software & Data Management

The analog MASTER-HONEY/BX requires no software. For the digital variant (MASTER-HONEY/BX-D), data output is limited to on-device display and manual transcription—no Bluetooth, USB, or cloud connectivity is embedded. This design prioritizes regulatory simplicity: absence of electronic data storage eliminates requirements for FDA 21 CFR Part 11 validation, audit trail generation, or cybersecurity controls. Users may integrate readings into LIMS or Excel-based QC databases via manual entry, ensuring full traceability through controlled SOPs (e.g., SOP-HNY-REF-01). Calibration verification is performed using certified 20.0°Brix and 78.0% moisture reference fluids supplied by ATAGO (Cat. No. 2311-12 and 2311-13), with calibration frequency recommended before each shift or after 20 consecutive measurements.

Applications

• Pre-packaging moisture verification to prevent fermentation (yeast growth threshold: >18.6% moisture).
• Batch release testing in honey processing facilities against internal specifications (e.g., ≤18.0% moisture for premium grade).
• Origin authentication support—correlation of measured moisture with regional climatic norms (e.g., Mediterranean vs. tropical honeys).
• Supplier qualification audits where rapid, on-site assessment replaces lab-based Karl Fischer titration.
• Educational use in apiculture training programs to demonstrate hygroscopic behavior and crystallization kinetics.

FAQ

Is the MASTER-HONEY/BX compliant with ISO/IEC 17025 for accredited testing?
No—it is a field-grade screening tool, not a primary reference instrument. Accredited labs must validate its use per ISO/IEC 17025 Clause 7.2.2 and maintain uncertainty budgets for moisture determination.
Can it measure adulterated honey containing corn syrup or rice syrup?
It detects total soluble solids, not composition. Adulterants elevate °Brix but do not alter the moisture–Brix inverse relationship; thus, anomalous deviations (e.g., 17.5% moisture at 38°Brix) may indicate adulteration and warrant confirmatory analysis (e.g., C4/C3 isotopic ratio testing).
What is the minimum sample volume required?
Approximately 0.3 mL—sufficient to fully cover the prism surface without overflow. Excess sample does not improve accuracy and may impair cleaning.
How often should the prism be cleaned?
After every measurement, using lint-free tissue and distilled water or ethanol; residual sugars cause refractive drift and prism etching over time.
Does ATAGO provide calibration certification with purchase?
Yes—each unit ships with a factory calibration certificate (traceable to JCSS standards), valid for 12 months from date of issue. Recalibration is recommended annually or after mechanical impact.