Perform measurements to the angular position of a rotor shaft or rotating process, to control it with precision, low cost and remotely, currently constitutes a problem, since the Current systems for this measure are expensive, require additional parts, and some do not provide the possibility of transmitting your variables to the Internet, in addition to some of these they have a short shelf life. While previously in the Control Research Group Electronic some prototypes were designed to solve the problems mentioned, these they have difficulties to implement at scale. Since they require hardware or software specialized, increasing its cost in addition to requiring direct human intervention. To This work has compared the most important encoders, both for their industrial use and for its advancement and development.