HunterLab Agera Desktop Color Measurement Instrument for Coil Coated Metal Panels
| Brand | HunterLab |
|---|---|
| Origin | USA |
| Model | Agera |
| Product Type | Color Difference Meter |
| Instrument Type | Benchtop |
| Optical Geometry | d/8° Integrating Sphere (with Optional 0°/45° Annular Illumination Module) |
| Light Source | Full-Spectrum Balanced LED Array with UV-Adjustable Output |
| Spectral Range | 400–700 nm (standard) |
| Repeatability | ΔE*ab ≤ 0.03 |
| Compliance | ASTM D2244, ASTM E308, ISO 7724, ISO 11664, CIE No. 15, GB/T 3978–2008 |
| Data Output | CIE L*a*b*, L*C*h*, YI (ASTM D1925 & E313), ΔE*ab, ΔE00, Gloss (60°), High-Resolution Sample Imaging |
Overview
The HunterLab Agera is a high-precision benchtop color measurement instrument engineered specifically for the objective evaluation of color, gloss, and surface appearance of coil-coated metal panels—widely used in architectural cladding, appliance manufacturing, and automotive trim applications. It operates on dual optical configurations: standard d/8° integrating sphere geometry for diffuse reflectance measurements compliant with ISO 7724-1 and ASTM D2244, and an optional annular 0°/45° illumination module that replicates human visual assessment under standardized viewing conditions. This dual-geometry capability ensures metrological alignment between instrumental data and perceptual judgment—critical for QC labs validating batch-to-batch consistency across large-format coated steel or aluminum substrates. The system employs a thermally stabilized full-spectrum LED array covering 360–700 nm, enabling accurate quantification of both non-fluorescent and fluorescent samples, including those treated with optical brightening agents (OBAs). UV energy output is software-controllable and factory-calibrated against NIST-traceable standards, supporting compliance with ASTM D6290 for fluorescent material characterization.
Key Features
- Dual optical path architecture: Standard d/8° sphere for total reflectance + field-replaceable 0°/45° annular module for directional appearance assessment
- UV-adjustable full-spectrum LED illumination with spectral stability < ±0.1 nm/h over 1,000 hours
- Integrated 60° gloss sensor meeting ISO 2813 and ASTM D523 specifications
- High-resolution digital imaging (≥5 MP) synchronized with spectral acquisition for spatial defect mapping and sample documentation
- Thermally regulated optical bench minimizing drift (< 0.005 ΔE*ab/°C)
- Automated aperture selection (Ø8 mm, Ø4 mm, and small-area targeting) for heterogeneous or textured surfaces
- Compliance-ready audit trail with user-level access control, electronic signatures, and 21 CFR Part 11–compatible data logging
Sample Compatibility & Compliance
The Agera accommodates rigid flat panels (up to 300 × 300 mm), cut specimens, powder dispersions, and injection-molded plaques—common in PTA, PP, PE, PET, ABS, and POM production environments. Its mechanical sample stage supports repeatable positioning within ±0.1 mm tolerance. All measurement protocols adhere to international standards including ISO 11664 (CIE colorimetric observers), ASTM E308 (color computation), and ISO 7724-2 (instrumental colorimetry). For regulated industries, the system supports GLP/GMP workflows via configurable reporting templates, calibration certificate traceability to NIST SRM 2020 and 1004, and full metadata capture—including environmental temperature/humidity, operator ID, and instrument firmware revision.
Software & Data Management
Equipped with Vision® 5.0 software, the Agera delivers unified control of color, gloss, and image acquisition within a single interface. Raw spectral data (10 nm resolution) is stored in vendor-neutral .qtx format; processed results export to CSV, PDF, or XML for LIMS integration. Statistical process control (SPC) tools include X-bar/R charts, capability indices (Cp/Cpk), and trend analysis with alarm thresholds based on user-defined tolerances (e.g., ΔE00 ≤ 0.5 for premium architectural finishes). Audit logs record all parameter changes, calibration events, and result modifications with timestamps and operator credentials—fully compliant with FDA 21 CFR Part 11 requirements for electronic records and signatures.
Applications
- Color release testing of prepainted metal coils prior to slitting and fabrication
- Batch validation of chromatic consistency across multi-zone coating lines (e.g., coil coaters with IR/catalytic curing zones)
- Fluorescence compensation analysis for OBA-containing polyester topcoats
- Gloss uniformity mapping across panel edges versus center regions
- Correlation studies between instrumental metrics (ΔE00, YIE313) and customer visual acceptability panels
- Long-term stability monitoring of pigment dispersion in solvent-borne and water-borne systems
FAQ
Does the Agera support measurement of curved or non-planar coated panels?
Yes—when paired with the optional articulating sample holder and edge-proximity sensor, it enables stable positioning of slightly curved substrates (radius ≥ 150 mm) while maintaining optical alignment per ISO 7724-2 Annex B.
Can UV energy be disabled for non-fluorescent samples without recalibration?
Yes—UV output is digitally gated and independently controlled; disabling UV does not affect visible-range calibration stability or require requalification.
Is the 0°/45° module interchangeable without tools?
Yes—the optical head mounts via precision kinematic coupling and can be swapped in < 90 seconds with no alignment tools or technician intervention.
What spectral resolution does the Agera provide?
10 nm nominal bandwidth with photodiode array detection; interpolated to 1 nm intervals in software for CIE tristimulus computation.
How is instrument performance verified between calibrations?
Built-in ceramic tile standards (white, black, green) enable daily verification per ASTM E2539; deviation alerts trigger automatic recalibration prompts with full traceability.
