ATAGO CM-Baseα-MAX Inline Refractometer

Overview

The ATAGO CM-Baseα-MAX Inline Refractometer is an industrial-grade, process-integrated optical sensor engineered for continuous, real-time measurement of soluble solids concentration—expressed as Brix—in liquid streams. Based on the fundamental principle of critical-angle refractometry, the instrument measures the refractive index of a flowing sample in direct contact with a sapphire prism, converting it to Brix values via built-in calibration curves traceable to NIST-standard sucrose solutions. Designed for permanent installation in sanitary or industrial piping systems, the CM-Baseα-MAX operates under dynamic flow conditions without requiring sample extraction, bypass loops, or manual intervention. Its robust stainless-steel housing and IP67-rated enclosure ensure reliable performance in humid, washdown, or vibration-prone environments typical of food, beverage, chemical, and pharmaceutical production lines.

Key Features

• High-precision optical sensing with ±0.2% Brix accuracy and 0.1% Brix resolution across a wide dynamic range (0.0–93.0% Brix)
• Integrated automatic temperature compensation (ATC) spanning 10–95°C, enabling stable readings despite thermal fluctuations in process streams
• Compact form factor (90 × 90 × 58 mm) and low mass (820 g) facilitate retrofitting into existing pipelines with minimal spatial impact
• Dual-output interface: analog 4–20 mA current loop for PLC/DCS integration and digital RS-232C for configuration, diagnostics, and data logging
• Single-cable power-and-data architecture simplifies wiring, reduces installation time, and improves signal integrity
• Sapphire prism surface with chemical resistance to acids, alkalis, alcohols, glycols, and organic solvents—validated per ASTM F798 for optical durability
• Compliant with electromagnetic compatibility (EMC) standards IEC 61326-1 and safety standard IEC 61010-1 for industrial measurement equipment

Sample Compatibility & Compliance

The CM-Baseα-MAX is validated for use with aqueous solutions containing sucrose, glucose, fructose, salts, alcohols (ethanol, IPA), glycols (EG, PG), caustics (NaOH), oxidizers (H₂O₂), and specialty solvents (NMP, DMF). It supports industry-specific calibration modes—including Plato for wort, SW for brine, and NaOH for caustic cleaning solutions—enabling cross-product line flexibility without hardware modification. All factory calibrations are performed using certified reference materials and documented per ISO/IEC 17025 requirements. The device meets hygiene design principles outlined in EHEDG Doc. 8 and 3-A Sanitary Standards 74-01, making it suitable for FDA-regulated food and beverage applications. Optional validation support packages include IQ/OQ documentation templates aligned with GMP and GLP quality systems.

Software & Data Management

Configuration and monitoring are performed via ATAGO’s proprietary PC-based software, compatible with Windows 10/11. The interface enables full parameter setup—including user-defined Brix-to-concentration conversion tables, alarm thresholds, sampling rate adjustment (1–10 Hz), and ATC offset tuning. All measurement data include embedded timestamps and temperature readings, supporting audit-ready traceability. Raw output streams comply with Modbus RTU protocol over RS-232C upon request, facilitating integration into SCADA and MES platforms. Data logs can be exported in CSV format for statistical process control (SPC) analysis, including capability indices (Cp, Cpk) and trend charting. The firmware supports secure firmware updates and maintains internal event logs for maintenance tracking and root-cause analysis during quality investigations.

Applications

This refractometer serves as a primary concentration monitoring tool in continuous processes where compositional consistency directly impacts product quality, yield, or regulatory compliance. Key use cases include: real-time Brix control in juice evaporation and syrup blending; endpoint detection in sugar crystallization and caramelization; concentration verification in dairy ultrafiltration retentate; caustic strength monitoring in CIP (clean-in-place) cycles; ethanol recovery tracking in distillation overheads; and glycol concentration assurance in HVAC chillers and antifreeze formulation. In biopharmaceutical manufacturing, it supports buffer preparation and media concentration checks prior to sterile filtration. Its stability under variable flow rates (0.1–5 m/s) and tolerance to suspended solids (<50 ppm) make it suitable for clarified, filtered, or microfiltered streams.

FAQ

Does the CM-Baseα-MAX require periodic recalibration?
Yes—ATAGO recommends annual calibration verification using certified sucrose standards. Field recalibration can be performed using two-point Brix standards (e.g., 10% and 60%) following the procedure in the operator manual.
Can it be installed in vertical or downward-flowing pipes?
Yes, provided the prism face remains fully wetted and free of air pockets; orientation-specific mounting brackets are available upon request.
Is the device compatible with hazardous area classifications?
The standard CM-Baseα-MAX is not intrinsically safe; however, explosion-proof enclosures (ATEX II 2G Ex db IIB T4 Gb / UL Class I Div 2) are available as custom configurations.
What maintenance is required?
Routine inspection of the prism surface for fouling or scratches every 3–6 months; cleaning with deionized water and lint-free wipes; no consumables or moving parts are involved.
How is temperature compensation implemented?
A high-stability Pt1000 RTD sensor mounted adjacent to the prism measures fluid temperature in real time, applying a polynomial correction algorithm derived from empirical refractive index vs. temperature data for aqueous sucrose solutions.