HunterLab SpectraProbe XE Online Color Measurement System
| Brand | HunterLab |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Product Category | Imported |
| Model | SpectraProbe XE |
| Price Range | USD 28,000–42,000 (FOB) |
| Instrument Type | In-line / Online Colorimeter |
| Optical Geometry | 8°/diffuse (d) |
| Light Source | Pulsed Xenon Lamp |
| Spectral Range | 400–700 nm |
| Repeatability | ΔE*ab ≤ 0.03 |
Overview
The HunterLab SpectraProbe XE is an industrial-grade in-line color measurement system engineered for continuous, non-contact spectral monitoring of liquid, paste, powder, and semi-solid materials during manufacturing processes. Operating on the principle of diffuse reflectance spectroscopy with an 8°/diffuse (8/d) optical geometry, the instrument captures full-spectrum data across the visible range (400–700 nm) using a high-stability pulsed xenon lamp—ensuring consistent illumination without thermal drift or lamp aging effects typical of tungsten-halogen sources. Its measurement engine computes CIE L*a*b*, L*C*h°, Hunter L,a,b, whiteness (CIE, ASTM E313, Ganz), yellowness (ASTM D1925, E313), and custom user-defined indices—including proprietary HunterLab color difference formulas (ΔEHunter, ΔECMC, ΔE94, ΔE2000). Designed for integration into PLC-controlled production lines, the SpectraProbe XE delivers real-time color stability assessment with ≤0.03 ΔE*ab repeatability under controlled environmental conditions—meeting the metrological requirements of ISO 13655:2017 (spectral measurement) and ASTM D2244 (color difference calculation).
Key Features
- True in-line architecture with IP65-rated stainless-steel housing for wet-process environments (e.g., beverage bottling, paint mixing, pharmaceutical suspension lines)
- Optical path optimized for minimal sample interference: no moving parts, no fiber-optic coupling degradation, and zero calibration drift over 12-month intervals when operated within specified ambient temperature (15–35°C) and humidity (30–80% RH, non-condensing) ranges
- Integrated temperature and humidity sensors for environmental compensation of spectral response
- RS-485 Modbus RTU and Ethernet/IP communication protocols for seamless integration with SCADA, MES, and DCS platforms
- Auto-zero and auto-reference routines triggered via external I/O signals or scheduled intervals—eliminating manual intervention during 24/7 operation
- Compliance with IEC 61000-6-2 (EMC immunity) and IEC 61000-6-4 (EMC emission) standards for factory-floor deployment
Sample Compatibility & Compliance
The SpectraProbe XE accommodates opaque and translucent samples flowing through pipes (≥25 mm ID), conveyor belts (with optional belt-speed synchronization), or static vessels equipped with sight glasses. It supports measurement of aqueous solutions, emulsions, polymer melts, food slurries, and coated substrates—provided optical path length and surface homogeneity meet minimum scattering criteria defined in ASTM D6290. All firmware and calibration traceability comply with ISO/IEC 17025:2017 requirements for testing laboratories. The system supports audit-ready calibration logs and electronic signature workflows aligned with FDA 21 CFR Part 11 for regulated industries including food & beverage, pharmaceuticals, and cosmetics.
Software & Data Management
HunterLab’s Universal Software Suite (v5.5+) provides configuration, real-time trending, SPC charting (X̄-R, Cpk), and deviation alerting via SNMP or email. Raw spectral data (31-point per nm, 1 nm resolution) is stored in HDF5 format for third-party analytics integration. Version-controlled firmware updates include cryptographic signing to ensure integrity. Data export supports CSV, XML, and SQL Server-compatible schemas. Audit trails record all user actions—including parameter changes, calibration events, and report generation—with time stamps, operator IDs, and reason codes—fully satisfying GLP and GMP documentation requirements.
Applications
- Continuous color consistency control in dairy processing (e.g., cheese whey, yogurt color grading)
- Real-time batch-to-batch verification in paint & coatings formulation lines
- In-process monitoring of pigment dispersion stability in inkjet ink manufacturing
- Automated release testing of oral suspensions and topical gels in pharmaceutical QA/QC labs
- Color drift detection in PET bottle resin extrusion prior to molding
- Harvest timing optimization in tomato concentrate production via L*a*b* trajectory analysis
FAQ
What is the recommended calibration frequency for in-line operation?
Calibration verification is required daily using a certified ceramic tile; full recalibration with NIST-traceable standards is recommended every 6 months or after maintenance.
Can the SpectraProbe XE measure haze or clarity simultaneously with color?
Yes—when configured with the optional Haze Module (ColorQuest OL Haze variant), it reports ASTM D1003 haze % alongside CIE L*a*b* and spectral transmittance.
Is spectral data export compatible with Python-based chemometric modeling tools?
Yes—HDF5 output includes metadata headers compliant with h5py and scikit-learn ingestion pipelines for PCA, PLS regression, and classification model development.
Does the system support multi-point averaging across a pipe cross-section?
Yes—via synchronized multi-head installation (up to 4 probes) with time-aligned spectral stitching in software.
How is temperature compensation implemented at the hardware level?
A PT100 sensor embedded in the optical head feeds real-time thermal offset values to the spectrometer’s dark-current correction algorithm, minimizing baseline drift across ±5°C operational swings.
