... /100um surface glass measurement PT-EMR The magnetic grid electronic ruler1. Magna, the magnetic grid encoder2. A non-contact, high-speed encoder ... . Armed with auxiliary tool for the length, flatness adjustment, magnetic grid can be long (up to 20 mm), and provide 10 ... length 1000 - 2900 mm (per 100mm) PT-EMR;The magnetic grid electronic ruler;Magnetic grating ruler;Length scale;Grating ruler;