HunterLab UltraScan Pro / UltraScan VIS / Vista / Agera / ColorFlex EZ / Aeros / STHT Series Spectrophotometric Color Measurement Systems

Overview

HunterLab’s portfolio of spectrophotometric color measurement instruments represents a comprehensive engineering solution for objective, traceable, and metrologically robust color evaluation across research laboratories, quality control environments, and industrial production lines. These systems operate on the fundamental principles of CIE-standardized colorimetry—measuring spectral reflectance or transmittance across defined wavelength bands and converting raw data into standardized color spaces (CIE XYZ, L*a*b*, L*C*h°, Yellowness Index, Whiteness Index, ASTM D1003 Haze, Pt-Co, Gardner, etc.) using NIST-traceable calibration protocols. Each instrument is purpose-built to meet specific optical geometry requirements mandated by international standards—including ASTM E308, ISO 11664, CIE Publication 15, USP , and FDA 21 CFR Part 11—ensuring compliance in regulated sectors such as pharmaceuticals, food & beverage, polymers, coatings, and medical device manufacturing.

Key Features

• Multi-geometry platform architecture: Supports d/8° (diffuse illumination/8° viewing), 0°/45°, 45°/0°, 0°/30°, and d/0° optical configurations—each aligned with distinct ISO/ASTM test methods for surface texture, gloss sensitivity, translucency, and transmission measurement.
• Xenon flash lamp illumination: Delivers stable, pulse-based broadband output with minimal thermal drift; enables high signal-to-noise ratio across UV-Vis-NIR ranges without lamp aging artifacts.
• High-resolution silicon photodiode array detection: UltraScan VIS employs dual 512-element linear arrays for simultaneous reflectance and transmittance acquisition; UltraScan Pro extends spectral coverage to 350–1050 nm for applications requiring UV fluorescence suppression or NIR pigment analysis.
• Robust mechanical design: All benchtop models feature temperature-stabilized optical benches, motorized port shutters, and precision-machined sample compartments engineered for long-term repeatability (ΔE*ab ≤ 0.03) and inter-instrument agreement (ΔE*ab ≤ 0.15 at 95% confidence).
• Non-contact and inline capability: Aeros utilizes adaptive height-sensing probe technology for consistent 0°/30° measurement across variable-thickness substrates; STHT integrates seamlessly with PLC-controlled automation for real-time color feedback in continuous manufacturing processes.

Sample Compatibility & Compliance

HunterLab instruments accommodate solid, liquid, powder, paste, film, and translucent samples—including textured, glossy, metallic, and fluorescent materials—without requiring user-defined correction factors. The Vista d/0° system satisfies ASTM D1003 for haze and luminous transmittance of clear plastics and liquids; UltraScan VIS meets ISO 2470-1 for ISO brightness (Whiteness) and TAPPI T485 for Yellowness Index (YI E313); ColorFlex EZ variants are certified per AOAC 992.03 for tomato paste color grading and SCA 2018 for roasted coffee bean classification. All systems support GLP/GMP audit trails, electronic signatures, and 21 CFR Part 11-compliant software validation packages upon request.

Software & Data Management

Universal Software Suite (v8.x) provides centralized instrument control, method configuration, statistical process control (SPC), and multi-user role-based access. Raw spectral data is stored in vendor-neutral .qtx format compliant with ASTM E2534; reports export to PDF, CSV, and XML with embedded metadata (operator ID, timestamp, calibration history, environmental conditions). Cloud-enabled remote diagnostics and firmware updates ensure sustained regulatory alignment. Optional IQ/OQ/PQ documentation kits facilitate installation and operational qualification under ISO 13485 or ICH Q7 frameworks.

Applications

• Pharmaceuticals: Tablet coating uniformity, excipient color consistency, liquid suspension hue verification per USP .
• Foods & Beverages: Tomato paste redness (a*), orange juice chroma (C*ab), coffee roast degree (L*), dairy whiteness (CIE Whiteness), and caramel color intensity (Pt-Co units).
• Polymers & Plastics: Yellowing index tracking in UV-exposed PE/PP, haze evaluation of PET bottles per ASTM D1003, and batch-to-batch color matching for automotive interior components.
• Coatings & Inks: Metallic flake orientation assessment via multi-angle 0°/45° measurement, solvent resistance color shift quantification, and weathering stability profiling.
• Electronics: Display filter color gamut verification, OLED panel white point calibration, and PCB solder mask hue consistency.

FAQ

What optical geometry should I select for matte plastic parts?
For non-glossy, diffusely scattering surfaces, d/8° integrating sphere geometry (e.g., UltraScan VIS) is recommended to minimize directional bias and comply with ISO 7724-1 and ASTM D2244.
Can one instrument measure both color and haze of transparent films?
Yes—the Vista d/0° spectrophotometer simultaneously acquires CIE L*a*b* values, ASTM D1003 haze (%), and luminous transmittance (%) in a single measurement cycle.
Is spectral data export supported for third-party chemometric modeling?
All models provide full 1-nm interval spectral reflectance/transmittance data in ASCII or .qtx format, compatible with MATLAB, Unscrambler, and Python-based PLS regression workflows.
How often does the instrument require recalibration?
Annual NIST-traceable recalibration is advised; daily verification using supplied ceramic tile standards ensures ongoing accuracy per ISO 17025 requirements.
Does HunterLab software support multi-language interfaces for global labs?
Yes—Universal Software supports English, Simplified Chinese, Japanese, Korean, German, French, Spanish, and Portuguese language packs, all validated for technical terminology consistency.