With a measurement accuracy of ± 0,05% the µSPEED Laser-Encoder is the perfectly suited gauge to replace tactile speedometers/rotary encoders or to replace length and speed measurement via machine drives. The non-contact µSPEED laser encoder length measurement and speed measurement systems operate contact-free and because of that without slippage, are maintenance-free and permanently calibrated, while being almost material-independent. Light, dark and black, reflecting, matt, structured and rough surfaces are measured with high accuracy and without changing the parameter settings. The µSPEED laser gauge measures roll lengths and controls cutting processes and machines. Differential length and differential speed can also be measured.