M8 / M12 Circular Connectors TE Connectivity's ERNI M8 / M12 Circular Connectors have proven to be very reliable in a variety of applications. These connectors are tailor-made for the connection of field devices of industrial automation, transportation, communications, and more. ERNI supplements the comprehensive product range of M8 and M12 connectors with the application and customized solutions and accessories including o-rings, seals, and protective caps. A high degree of cost-efficiency is guaranteed thanks to the option of automatic machine processing and solder processes. The M12 right-angle connectors are perfectly made for sensor tube applications with a design that supports automatic assembly.