Quick Answer:
Up to 1,900 mm (75 in) of width change using dual ODC 960 sensors; no fixed maximum width, with 0.127 mm resolution.
Roll-2-Roll center guiding uses one wide-range sensor, or two sensors for wider webs. With two ODC 960 sensors there is no fixed maximum web width—the mechanical spacing between the heads sets it—and the web can change width by up to 1,900 mm (75 in) without moving either sensor, while maintaining 0.127 mm resolution.