Automatic Gauge Control
- Technology:X-ray / laser thickness gauges
- Response time:< 2 ms
- Tolerance:±0.1% of nominal
- Actuators:Roll gap, bending, speed, tension
Carbon, stainless and specialty alloys — casting, hot and cold rolling, annealing, pickling, coating, slitting, cutting
Trusted by leading steel producers worldwide for precision measurement and control across the entire production chain.
Are you worried that coils feeding your line are not within thickness tolerance?
Coil thickness tolerance is critical in metal processing: even small deviations cause defective profiles, accelerate tool wear and raise costs. LGE offers end-to-end measurement and control solutions for steel mills — AGC, thickness, width, flatness, roughness, shape detection, weld inspection and fluid control — backed by 30+ years of precision and reliability.
LGE steel-mill solution portfolio
Thickness measurement (QC)
- Range:0.1 mm – 200 mm
- Accuracy:From ±0.5 µm to ±0.05%
- Technologies:Laser, X-ray
- Application:Hot/cold rolling, QC lab
Width measurement
- Range:200 mm – 3000 mm
- Accuracy:±0.2 mm
- Technology:Dual-edge laser triangulation
- Edge tracking:±200 mm lateral movement
Flatness & planarity
- Zones:16 to 120 across strip
- Accuracy:±1 I-unit
- Defect types:Centre wave, edge wave, quarter buckle
- AFC integration:Bending, shifting, cooling zones
Roughness measurement
- Parameters:Ra, Rz, Rmax, Rp, Rv
- Technology:Laser scattering / confocal
- Application:Surface-finish QC, texture analysis
- Speed:Inline up to 20 m/s
Pipe & profile shape
- Products:Pipes, tubes, beams, rails, bars
- Parameters:OD, ID, ovality, straightness
- Technology:3D laser profilometry
- Inline:100% inspection at line speed
Weld detection & inspection
- Defects:Lack of fusion, porosity, undercut
- Technology:Eddy current / laser shearography
- Application:ERW, SAW, laser-welded pipes
- Reporting:Real-time defect mapping
Emulsion & fluids control
- Parameters:Concentration, temperature, pH, conductivity
- Technology:Inline refractometers and sensors
- Benefits:Optimised lubrication, reduced consumption
- Integration:PLC / DCS for automatic dosing
Integrated steel-mill solutions
From melt shop to finished product — complete measurement coverage
1
Slab / billet
Dimension, temperature, surface
2
Hot rolling
AGC, width, flatness, temperature
3
Pickling
Thickness, width, surface
4
Cold rolling
High-precision AGC, flatness
5
Annealing
Gauge monitoring
6
Coating
Coating weight, width, flatness
7
Pipe mill
Weld inspection, shape, OD
8
Finishing
Final QC: thickness, width, flatness, roughness
Why steel producers choose LGE
Tighter tolerances
Reduce scrap by up to 40% with precision control.
Faster response
Sub-millisecond control loop for immediate correction.
Higher yield
Increase first-pass yield by 15–25%.
Closed-loop integration
Direct connection to mill actuators.
AI-assisted optimisation
Adaptive learning for material grades.
24/7 global support
Remote diagnostics and on-site service.
Proven performance in steel mills
Real results from global installations
±0.1%
Thickness tolerance
40%
Less scrap
99.5%
Up-time
150+
Installed systems
30+
Years experience
Seamless integration with your existing mill infrastructure
All LGE systems support PROFINET, EtherCAT, Ethernet/IP, Modbus TCP and analog interfaces for direct connection to existing PLCs, SCADA and MES systems.