HunterLab UltraScan PRO Spectrophotometer

Overview

The HunterLab UltraScan PRO is a high-precision benchtop spectrophotometer engineered for rigorous color measurement, formulation, and quality control in industrial and laboratory environments. Operating on the principle of diffuse/8° (d/8°) geometry with integrated sphere illumination and detection, it conforms to CIE, ASTM E308, ISO 11664, and USP standards for spectral reflectance and transmittance analysis. Its pulsed xenon lamp delivers stable, full-spectrum illumination across the visible range (400–700 nm), eliminating thermal drift and enabling rapid, repeatable measurements without lamp warm-up or degradation over time. As the successor to HunterLab’s legacy instruments—including the foundational ColorQuest series—the UltraScan PRO implements the original Hunter L,a,b color space developed by Dr. Richard S. Hunter in 1948, alongside modern CIE 1976 L* a* b*, CIE L* C* h*, and multiple whiteness/yellowness indices (e.g., ASTM E313, ISO 2470, Ganz). This dual-historical and forward-compatible architecture ensures traceability across decades of color data while supporting current regulatory and inter-laboratory comparability requirements.

Key Features

• Optical design compliant with ASTM D2244, ISO 7724-1, and CIE Publication No. 15:2018 for d/8° sphere geometry with specular component included (SCI) and excluded (SCE) modes
• Pulsed xenon light source providing >1 million flashes lifetime, zero warm-up delay, and consistent spectral output across instrument lifespan
• High-resolution 31-channel silicon photodiode array with 10-nm effective bandwidth and linear response calibrated against NIST-traceable standards
• Integrated UV calibration and fluorescence correction capability for optical brightener assessment in paper, textiles, and plastics
• Robust mechanical architecture featuring motorized sample port, auto-calibration with ceramic tile reference, and sealed optical path resistant to ambient humidity and particulate contamination
• Compliance-ready firmware supporting audit trails, user access levels, electronic signatures, and 21 CFR Part 11–compliant data integrity protocols

Sample Compatibility & Compliance

The UltraScan PRO accommodates solid, liquid, and translucent samples via standardized holders—including 50-mm and 25-mm diameter sample cups, transmission cells (10–50 mm pathlength), and custom fixtures for irregular geometries. It supports measurement of powders, granules, pastes, films, and coated substrates under controlled pressure or vacuum conditions when used with optional accessories. Regulatory alignment includes full support for FDA-regulated industries (pharmaceuticals, food packaging, medical devices), ISO 9001/14001 quality systems, and GLP/GMP documentation workflows. All factory calibrations are traceable to NIST SRM 930e (spectral transmittance) and SRM 2036 (diffuse reflectance), with optional on-site verification using certified reference materials per ASTM E2539.

Software & Data Management

Instrument operation and data analysis are managed through EasyMatch QC software—validated for IQ/OQ/PQ and compatible with Windows 10/11 (64-bit). The platform enables real-time pass/fail evaluation against user-defined tolerances (ΔL*, Δa*, Δb*, ΔE*ab, ΔE00), statistical process control (SPC) charting, batch trending, and multi-instrument network synchronization. Raw spectral data (31-point reflectance/transmittance curves) are stored in ASCII and XML formats for third-party integration with LIMS, MES, or ERP systems. Software modules include Color iMatch for formulation prediction, ColorFlex for cross-instrument correlation, and Compliance Manager for electronic record retention meeting 21 CFR Part 11 Annex 11 and EU GMP Annex 11 requirements.

Applications

• Paint & coatings: Batch-to-batch consistency verification, pigment dispersion analysis, weathering stability assessment
• Plastics & polymers: Melt index color tracking, additive migration studies, recycled content validation
• Food & beverage: Whiteness/yellowness quantification in dairy powders, browning index in fruit concentrates, package color fidelity under varying lighting conditions
• Pharmaceuticals: Tablet film coating uniformity, excipient color specification, stability-indicating assays per ICH Q5C
• Paper & pulp: Brightness (ISO 2470), yellowness (ASTM E313), opacity, and fluorescence compensation for OBAs
• Textiles & fibers: Dye lot matching, metamerism evaluation under D65, A, and F2 illuminants, fastness testing correlation

FAQ

What distinguishes the UltraScan PRO from earlier HunterLab models such as ColorQuest XE?

The UltraScan PRO features enhanced signal-to-noise ratio, improved UV/VIS spectral stability, expanded software compliance capabilities, and native support for both Hunter L,a,b and CIE L* a* b* with automatic interconversion.
Is the instrument suitable for measuring translucent or backlit samples?

Yes—via optional transmission mode with variable pathlength cells and rear-illuminated sample holders compliant with ASTM D1003 for haze and clarity measurements.
Can spectral data be exported for use in external modeling tools?

Yes—raw 31-point spectral data (.csv and .xml) and computed colorimetric values are fully exportable without proprietary lock-in.
Does the system support remote diagnostics or preventive maintenance alerts?

Yes—through embedded Ethernet connectivity and optional HunterLab Connect cloud service for firmware updates, usage analytics, and predictive lamp life monitoring.
How is instrument performance verified during routine operation?

Via daily automated self-checks, quarterly verification with certified ceramic tiles (NIST-traceable), and annual full calibration per ISO/IEC 17025-accredited service providers.