METIRIO® is a state-of-the-art, high-precision optical encoder designed and manufactured to meet the most stringent market requirements for closed-loop nano-positioning. The development of the device is based on many years of experience and extensive product and market analysis, and takes into account essential design rules to meet today's technical challenges. It features maximum miniaturization, high resolution and speed. The readhead is modular and can be supplied as an OEM product or built into a customized metal housing to facilitate the integration process and ease of use. Metirio sets new standards in terms of low power consumption and UHV use. The graphical user interface of the associated software includes smart functions to simplify parameter settings, and all parameters can be stored in the internal memory for possible recall. The METIRIO® encoder is designed to measure all reflective incremental scales with 20 µm pitch, including reference mark detection.