MyLGE - LGE Engineering srl

Selecting the optimal thickness measurement technology depends on material properties, line speed, environmental conditions, and accuracy requirements. This comprehensive guide compares laser triangulation, confocal chromatic, and X-ray transmission technologies to help you make an informed decision for your specific application. Laser sensors excel in measuring metals, ceramics, and opaque plastics. With sampling rates up to 10 kHz and resolutions down to 0.2 microns, they're ideal for high-speed rolling mills and real-time AGC feedback. However, they require a clean optical path and may struggle with transparent or highly reflective surfaces.

Confocal Chromatic: For Transparent and Multilayer Materials

Confocal sensors can measure transparent films, glass, and multilayer composites by detecting reflections from each layer interface. They offer sub-micron resolution and are immune to ambient light interference, making them perfect for plastic extrusion lines and coating thickness measurements.

X-Ray Transmission: For Harsh Environments and Alloy Measurement

X-ray gauges penetrate through dust, steam, and material coatings. They can measure total thickness regardless of material color or surface finish, and can even determine alloy composition when combined with energy-dispersive detectors. Ideal for hot rolling mills and heavy industrial settings.

Recommendation: For steel hot rolling ? nGauge X-Ray. For cold rolling and finishing ? LGauge laser. For plastic films ? Confocal or laser depending on transparency.