HunterLab HunterLab2 Desktop Spectrophotometer for Color Measurement and Yellowness Index Analysis
| Brand | HunterLab |
|---|---|
| Origin | USA |
| Distributor Type | Authorized Distributor |
| Import Status | Imported |
| Model | HunterLab2 |
| Product Category | Spectrophotometric Colorimeter |
| Instrument Type | Benchtop |
| Optical Geometry | 0/45° Integrating Sphere |
| Light Source | Full-Spectrum LED |
| Spectral Range | 400–700 nm |
| Repeatability | ΔE*ab ≤ 0.03 |
Overview
The HunterLab HunterLab2 is a benchtop spectrophotometric colorimeter engineered for high-precision, traceable color measurement in quality control laboratories and R&D environments. Operating on the principle of diffuse reflectance spectroscopy with a calibrated 0/45° optical geometry, it captures spectral data across the visible spectrum (400–700 nm) using a stable full-spectrum LED light source and an integrating sphere detector. This configuration minimizes directional bias and ensures compliance with CIE 15:2018 and ASTM E308-22 standards for colorimetric measurement. The instrument implements the foundational CIELAB (L*a*b*) color space—originally developed by Dr. Richard S. Hunter in 1948—and supports industry-critical indices including Yellowness Index (YI), Whiteness Index (WI), APHA/Pt-Co (Hazen), Gardner, and CIE Y tristimulus value. Its metrological architecture enables direct traceability to NIST-traceable ceramic and glass calibration standards supplied with each unit.
Key Features
- Benchtop form factor with ergonomic sample port and integrated touchscreen interface for standalone operation
- 0/45° optical geometry compliant with ISO 5-4, ASTM D2244, and ISO 11664-4, minimizing gloss and texture sensitivity
- Full-spectrum LED illumination providing stable, flicker-free output with >100,000-hour lifetime and no warm-up delay
- High signal-to-noise ratio CCD array detector enabling <0.03 ΔE*ab repeatability under controlled ambient conditions
- Factory-calibrated with NIST-traceable white, black, and green ceramic tiles; optional liquid cell holders and transmission accessories available
- Pre-loaded calculation engines for ASTM D1925 (YI), ASTM E313 (YI and WI), ISO 2470-1 (WI), and APHA 1621 (Hazen)
Sample Compatibility & Compliance
The HunterLab2 accommodates solid, powdered, granular, paste, and opaque liquid samples via standardized 25 mm or 40 mm aperture options. Optional transmission cells support clear liquids per ASTM D1209 and ISO 6271. All measurements adhere to GLP-compliant workflows: instrument verification logs, user authentication, and audit-ready calibration records are embedded within the firmware. The system supports IQ/OQ documentation packages aligned with FDA 21 CFR Part 11 requirements—including electronic signatures, change control, and secure data archiving—making it suitable for regulated pharmaceutical, food, polymer, and paint manufacturing environments.
Software & Data Management
The instrument operates natively via the included EasyMatch QC software (v5.x), which provides real-time pass/fail evaluation against user-defined tolerances, statistical process control (SPC) charts, and multi-instrument network synchronization. Raw spectral data (.qtx files) and calculated color indices export in CSV, XML, and PDF formats compatible with LIMS and ERP systems. Software modules support advanced analysis including batch trend reporting, inter-instrument agreement validation (per ASTM E2539), and custom index development using user-defined mathematical expressions. All data transactions maintain immutable timestamps and operator ID tagging for full regulatory traceability.
Applications
- Plastic pellet and resin manufacturers verifying YI stability during thermal processing and UV exposure
- Pharmaceutical excipient suppliers validating APHA/Hazen color limits per USP and EP 2.2.2
- Paper and pulp labs measuring ISO brightness and GE whiteness alongside Hunter YI for aging studies
- Food ingredient producers monitoring browning reactions in dairy powders and starch-based matrices
- Automotive coatings QA teams performing cross-lot color matching against master standards under D65 illuminant
- Academic research groups conducting accelerated aging trials where yellowing kinetics correlate with oxidative degradation pathways
FAQ
What color spaces and indices does the HunterLab2 calculate natively?
It computes CIELAB (L*, a*, b*, ΔE*ab, ΔE00), CIE XYZ, Hunter L, a, b, Yellowness Index (ASTM D1925, E313), Whiteness Index (ASTM E313, ISO 2470-1), APHA/Hazen, Gardner, and CIE Y.
Is the instrument compliant with FDA 21 CFR Part 11 for electronic records?
Yes—EasyMatch QC software includes role-based access control, electronic signatures, audit trails, and data integrity safeguards validated per Part 11 Annex 11 requirements.
Can the HunterLab2 be used for transmission measurements?
Yes—when equipped with optional 10 mm or 50 mm pathlength transmission cells, it complies with ASTM D1209 for transparent liquids and ISO 6271 for haze-corrected transmittance.
How often does the instrument require recalibration?
Annual factory recalibration is recommended; daily verification using supplied calibration tiles satisfies ISO/IEC 17025 interim verification requirements.
Does it support network integration with enterprise quality systems?
Yes—via OPC UA and RESTful API interfaces, enabling bidirectional data exchange with SAP QM, TrackWise, and other QMS platforms.
