This thesis deals with the design of a modular wearable prototype able to perform the monitoring of several physiological parameters. Wearable Health Devices (WHD) have drawn a lot of attention during the last decade in a wide range of domains. A variety of commercial devices have been produced with the aim to monitor the health condition of a person in everyday life or during sport activities. The focus of this project is the experimentation of a wearable device intended to be used by workers in heavy industries in order to monitor their vital signs during working days. The main motivation behind this choice is the lack of WHD for this particular type of application.