Connectors provide detachable connections to the analogue and digital world of data. They are extremely sensitive links for a reliable data transmission, and thus guarantee continual production processes. The standard Industry 4.0 is the force behind the increased networking of machines and devices in the production sector and requires under harsh industrial conditions an adaptation of the connectors in the highest degree of protection. IP67/68 connecting systems by EFB-Elektronik are absolutely dustproof and waterproof. Furthermore, they offer protection against water when dipped (IP67), or immersed continuously (IP68). IP67/68 connecting systems can be used in a wide variety of applications, such as for LAN or WAN, for the use in transport systems, during power generation, monitoring of systems, or for control technology.