OCS PS-800C High-Speed Particle Contamination Scanner
| Brand | OCS |
|---|---|
| Origin | Germany |
| Model | PS-800C |
| Application Scope | Polyolefin resin pellets (transparent & semi-transparent) |
| Throughput | Up to 1,000 kg/h |
| Detection Principle | Dual 3-CCD color line-scan imaging under free-fall conditions |
| Output Functions | Contamination identification, particle rejection triggering, color-ratio quantification |
| Compliance Context | Designed for GLP-aligned QC environments |
Overview
The OCS PS-800C High-Speed Particle Contamination Scanner is an industrial-grade optical inspection system engineered for continuous, non-contact characterization of polyolefin resin pellets in high-purity manufacturing workflows. It operates on the principle of synchronized dual-line scanning: as pellets descend freely through a calibrated vertical detection zone, two high-resolution 3-CCD color line-scan cameras—illuminated by spectrally stable LED light sources—acquire spatially registered RGB data at pixel-level precision. This architecture enables simultaneous detection of sub-millimeter contaminants (e.g., gel particles, metal fragments, carbonized specks, or foreign polymer residues), chromatic deviations exceeding defined ΔE* thresholds, and structural anomalies such as surface haze or internal cloudiness. Unlike manual visual sorting or static benchtop microscopy, the PS-800C delivers statistically robust, traceable results at production-line speeds—critical for manufacturers supplying materials to ultra-high-voltage cable insulation, optical film substrates, medical-grade tubing, and food-contact packaging applications where ISO 10993 or IEC 60811 compliance mandates rigorous particulate control.
Key Features
- Dual 3-CCD line-scan imaging with independent spectral channel calibration ensures consistent colorimetric accuracy across variable pellet transparency and refractive index ranges.
- Real-time free-fall trajectory optimization minimizes pellet tumbling and shadow artifacts, preserving detection fidelity for particles as small as 80 µm in equivalent spherical diameter.
- Integrated pneumatic ejection module responds within ≤12 ms latency to trigger rejection of contaminated or off-spec particles without disrupting upstream extrusion or conveying flow.
- User-definable classification rules support multi-parameter logic (e.g., “reject if L* +8 AND area > 0.05 mm²”) enabling adaptive QA protocols aligned with internal specifications or customer release criteria.
- Modular mechanical design accommodates integration into existing pelletizing lines (e.g., strand-cut or underwater pelletizers) with minimal footprint and standard 304 stainless-steel wetted surfaces compliant with FDA 21 CFR Part 11 hygiene guidelines.
Sample Compatibility & Compliance
The PS-800C is validated for use with virgin and recycled polyolefin pellets—including HDPE, LDPE, LLDPE, PP homopolymers and copolymers—within size ranges of 2–5 mm diameter and aspect ratios ≤ 1.5. Its optical path is optimized for materials with transmission >30% in the 400–700 nm range, making it especially effective for crystal-clear metallocene-catalyzed resins and low-haze random copolymers. System validation documentation includes IQ/OQ protocols traceable to NIST-calibrated reference standards. Data integrity features meet ALCOA+ principles: all image captures, classification events, and rejection logs are time-stamped, digitally signed, and stored with immutable audit trails—fully compatible with GLP/GMP quality systems requiring 21 CFR Part 11 electronic record compliance.
Software & Data Management
The proprietary OCS VisionSuite v4.2 software provides a secure, role-based interface for method development, real-time monitoring, and statistical process analysis. It supports automated generation of ASTM-compliant reports (e.g., contamination count per kg, color distribution histograms, batch-wise purity trends) and exports structured CSV/Excel datasets for integration with MES or LIMS platforms. All configuration changes are logged with operator ID, timestamp, and pre-/post-values. Optional OPC UA connectivity enables bidirectional communication with PLC-controlled extrusion lines for closed-loop feedback on melt filtration efficiency or screw speed adjustments based on real-time contamination load.
Applications
- Quantification of black specks and gels in HVDC cable insulation compounds per IEC 60811-503 and CIGRE TB 778 requirements.
- In-process verification of masterbatch dispersion homogeneity during color concentrate production.
- Batch release testing for optical-grade PP films targeting <0.1 ppm defect density (ASTM D1922 tear initiation threshold correlation).
- Root-cause analysis of reactor fouling events via retrospective spectral clustering of contaminant morphology and composition signatures.
- Supplier qualification audits requiring objective, instrument-based evidence of raw material purity consistency across delivery lots.
FAQ
What particle size range is reliably detectable?
The system achieves ≥95% detection probability for contaminants ≥80 µm in maximum dimension under nominal throughput conditions (600 kg/h), verified using NIST-traceable glass microsphere test standards.
Can the PS-800C distinguish between carbonized polymer and metallic inclusions?
Yes—through multi-spectral reflectance profiling and edge contrast analysis; differentiation is enabled by training mode using representative reference samples of known composition.
Is offline calibration required between batches?
No—auto-compensating illumination and real-time dark-field reference correction eliminate routine recalibration; annual performance verification against certified reference pellets is recommended.
Does the system support custom reporting formats for regulatory submissions?
Yes—XML schema definitions and report templates can be configured to align with specific agency requirements (e.g., EMA Annex 11, USP analytical instrument qualification).
