In an era where technology is advancing at an unprecedented rate, surpassing itself day by day, it is inevitable that this progress involves the health area too. This evolution is mainly represented by the constant increase in user-friendliness, functionality, miniaturization of devices and the possibility of collect a wide amount of data about a subject.In these devices the increment of computational power and the easiness of the integration with complex algorithms encourage their application on health technologies. The study of new methods for evaluating different vital signs falls within this scope.The objective of this thesis work consists in the use of a wearable device for evaluation of Blood Pressure(BP) in a non-invasive cuff-less based way.