The width gauge is a precision measurement device used to determine the width of sheet or strip products in hot or cold mill applications.A digital linescan camera capture stereoscopic images of the edges of the material. Image data is transmitted from the cameras to the processor via fiber optic cable, thus eliminating image corruption issues inherent in older analog systems. Data is processed resulting in width and centerline deviation data being instantly displayed for operators. the linescan cameras are enclosed into a robust housing, specifically designed for the harsh environment of the mill. With a measure frequency from 100 Hz to 1000Hz, exposure time of 10 microseconds to 10 milliseconds and a dynamic accuracy of +/-0.4mm, the system is the best in class compared to similar applications.