Destruction-free, non-tactile measuring principles are common, but these mostly optical measuring methods cannot match the precision of tactile encoders with photoelectric scanning. The great challenge is the development of a measuring device that combines high accuracy with destruction-free measurement. HEIDENHAIN has solved this problem with its new METRO 1281 MW length gauge. It features an extraordinarily low measuring force curve between 0.01 N and 0.07 N over its entire 12 mm measuring range.