This device is a low-power transmission module designed for long-life battery operation. It can log data from one or more connected sensors and autonomously transmitting them to a server via NB-IoT connectivity (through an integrated dedicated SIM card). The server receives the data, stores them, and makes them available through a secure, password-protected web portal accessible via user ID and password. Access to the platform is performed through a standard web browser and requires no software installation on the client side. The web portal provides the following functions: • Reading of selected variables • Graphical trend visualization of measurements • Data export in multiple formats • Alarm management • Alarm event logging