nGauge — the standard of excellence in online thickness gauging for metals

In the demanding world of metal rolling, precision and reliability are not optional — they are the foundation of profitability and quality. For decades, X-ray thickness gauges have been the gold standard for non-contact measurement in steel, aluminium and non-ferrous mills. LGE Engineering's nGauge represents the evolution of this trusted technology, delivering the accuracy, speed and robustness that modern Automatic Gauge Control (AGC) systems demand.

X-ray thickness gauging operates on the principle of mass absorption: as penetrative radiation passes through metal, the amount absorbed varies exponentially with thickness. This physical principle, combined with advanced digital signal processing, allows the nGauge to achieve ±0.1% accuracy and sub-micron resolution across an extraordinary thickness range — from ultra-thin foil at 7 microns up to hot steel exceeding 150 mm.

What sets the nGauge apart is its role as the ultimate input for AGC systems. In a rolling mill, the AGC uses thickness-deviation signals to adjust roll gap in real time, ensuring consistent product quality. The nGauge's millisecond-level response time — a calculation period as fast as 10 ms — makes it the ideal partner for closed-loop control, enabling producers to meet tight tolerances with minimal waste.

The nGauge is engineered for 24/7 continuous operation in harsh mill environments, withstanding heat, scale and vibration. Its digital architecture, unified under a single software platform, manages data from multiple sensors and technologies, simplifying integration and maintenance. The system also features digital calibration standards that allow fast, automated setup and standardization, reducing downtime and operator error.

With the nGauge, LGE Engineering has standardised and unified decades of experience in X-ray gauging, delivering a system that is modern, reliable and precise. Whether for hot strip mills, cold-rolling tandems or finishing lines, the nGauge provides the consistent, accurate data needed to “produce better, faster and cheaper”.