HunterLab Agera PET Chip Color Measurement System

Overview

The HunterLab Agera PET Chip Color Measurement System is a purpose-engineered benchtop spectrophotometer designed for precise, repeatable color, gloss, and surface appearance evaluation of polyester (PET) chips, polymer granules, and other heterogeneous solid materials in industrial quality control environments. It operates on dual optical principles: standard d/8° diffuse/8° geometry for CIE-compliant colorimetric measurement (CIELAB, CMC, ΔE00), and an optional 0°/45° annular illumination mode that emulates human visual assessment—critical for eliminating directional bias in textured, irregular, or anisotropic samples such as extruded PET flakes, injection-molded pellets, or ground polymer fragments. The instrument integrates spectral acquisition, 60° gloss quantification, and high-fidelity digital imaging into a single automated measurement cycle, enabling comprehensive physical characterization without manual repositioning or external instrumentation.

Key Features

• Full-spectrum LED illumination (360–700 nm) with independently controllable UV component for accurate fluorescence correction—essential for PET containing optical brightening agents (OBAs) or UV-stabilized additives.
• Dual-aperture optical path with three fixed contact measurement ports (15.89 mm, 25.4 mm, and 50.8 mm diameter) optimized for bulk chip sampling and statistical representativeness per ASTM D6290 and ISO 11476.
• Integrated 60° gloss sensor calibrated to NIST-traceable standards and certified per ASTM D523 and ISO 2813—providing simultaneous L*a*b*, gloss units (GU), and delta-gloss metrics within one measurement event.
• 5-megapixel coaxial imaging system with uniform 45° full-spectrum lighting enables real-time sample positioning verification and archival of true-color field-of-view images linked directly to spectral data records.
• Industrial-grade 7″ capacitive touchscreen running embedded EasyMatch Essentials software—supporting user-defined tolerances, pass/fail workflows, SPC charting, and multi-instrument network synchronization without PC dependency.
• Ruggedized optical housing with sealed spectrometer optics and shock-absorbing mechanical design ensures long-term photometric stability in production-floor environments subject to vibration, dust, and thermal fluctuation.

Sample Compatibility & Compliance

The Agera PET system accommodates loose-fill PET chips (0.5–8 mm nominal size), extruded granules, flake blends, and opaque or semi-crystalline thermoplastic particles. Its auto-height sensing mechanism dynamically adjusts the measurement head to maintain optimal focus distance across variable sample bed topography—eliminating operator-induced height variance. All optical measurements conform to CIE Publication No. 15:2018, ISO/CIE 11664 series, and ASTM D2244 for color difference reporting. Gloss functionality meets ISO 2813:2014 and ASTM D523-22 requirements, with factory calibration certificates traceable to NIST SRM 1938 and 2010. Optional 21 CFR Part 11-compliant firmware provides audit trails, electronic signatures, and secure role-based access control for regulated pharmaceutical, food-contact, or medical device manufacturing applications.

Software & Data Management

Embedded EasyMatch Essentials delivers fully functional color quality control without external computing hardware. It supports over 30 industry-standard indices (Yellowness Index E313, Whiteness Index CIE, APHA/Pt-Co, Gardner, etc.) and allows creation of custom indices based on empirical process correlations. Data export formats include CSV, XML, PDF reports, and direct transmission via SMTP email, FTP, or enterprise network protocols. The system logs all measurement events—including image thumbnails, spectral curves, gloss values, and environmental metadata (date/time, operator ID, instrument serial)—in a tamper-evident internal database. For GxP-regulated environments, the optional Electronic Records Module enforces ALCOA+ principles: attributable, legible, contemporaneous, original, accurate, complete, consistent, enduring, and available—with automatic backup, encryption, and configurable retention policies.

Applications

• Batch-to-batch consistency verification of virgin and recycled PET resin prior to fiber spinning or bottle preform extrusion.
• Quantification of thermal degradation (yellowing) during melt processing using YI E313 and b* trajectory trending.
• Gloss uniformity assessment of pellet surfaces to detect die-line defects, moisture-related surface haze, or additive bloom.
• Fluorescence compensation in OBA-dosed PET to distinguish true chromaticity from UV-enhanced brightness artifacts.
• Root-cause analysis of color drift in compounding lines through correlation of spectral deviation maps with process parameters (melt temp, screw speed, residence time).
• Supplier qualification and incoming inspection against master standards under standardized D65 illuminant and 10° observer conditions.

FAQ

Does the Agera PET system require annual recalibration?
No—HunterLab’s factory-calibrated optical train maintains NIST-traceable accuracy for 24 months under normal operating conditions. Optional annual verification services include spectral irradiance validation and gloss sensor drift assessment.
Can it measure PET chips in a standard sample cup without packing density control?
Yes—the auto-height sensor compensates for variable fill levels, and the large 50.8 mm aperture ensures statistically robust averaging across ≥100 individual chips per reading.
Is UV energy adjustment required for every PET lot?
Only when OBA concentration varies significantly between batches; the system stores up to 16 user-defined UV settings, each associated with a specific material grade or supplier.
How are images stored and retrieved for audit purposes?
Each measurement saves a timestamped JPEG thumbnail and full-resolution TIFF image, indexed by sample ID and searchable via built-in database filters—including date range, operator, and pass/fail status.
Does the system support integration with LIMS or MES platforms?
Yes—via Ethernet or Wi-Fi using industry-standard protocols (OPC UA, RESTful API, HL7), enabling bidirectional data exchange with LabVantage, Thermo Fisher SampleManager, or Siemens Opcenter Quality.