Automated identification of pinhole defects in strip and coil materials.
Global Gauge’s Pinhole Detection System automates the identification and reporting of pinhole defects in strip and coil materials. Integrated with Global Gauge’s Vision System, this solution uses advanced imaging and analytics to detect even the smallest surface discontinuities, providing operators with reliable, real-time defect reporting.
Strong rear illumination passes through any pinhole, captured by the front-side camera.
Vision software flags transmitted-light points as pinhole candidates.
Trained classifier filters water marks, oil drops, and dust from real defects.
Each pinhole is tagged by coil position and severity, exported with the ship ticket.
| Measurement principle | Backlit transmitted-light imaging |
| Application | Strip and coil pinhole detection |
| Detection size | From 0.1 mm diameter |
| Sample rate | Up to 200 fps per camera |
| Strip speed range | Static to mill maximum |
| Sensor type | Area-scan or line-scan, customer choice |
| Backlight | High-intensity LED, mill-rated |
| Field of view | Configurable 200 to 2,000 mm |
| Calibration | Field-recalibratable target |
| PLC platform | Allen-Bradley, Siemens, Emerson supported |
| Protocol | EtherNet/IP, PROFINET, OPC UA |
| HMI | EXOR or PC-based vision console |
| Power | 120/240 VAC, 50/60 Hz |
| Frame type | Strip-spanning C-frame |
| Operating distance | 0.5 to 2 m from strip |
| Ambient temperature | 0 to 50 °C operating |
| Enclosure rating | IP66, water-cooled options |
Comprehensive temperature and defect analysis across bar products during casting and rolling.
Real-time strip position tracking between rolling mill stands for centerline alignment.
Modern PLC-based shear control replacing outdated hardware to maximize usable yield.
Automated detection of cracks, tears, and edge splits during rolling and processing.
Tell us your strip dimensions and current pinhole tolerance. We will recommend a Pinhole Detection configuration and scope a mill visit.