The EA15 is a measuring display unit for transducers with output signals current or voltage according to IEC 60381. Up to four transducers can be connected in two- or three-wire circuits. Despite the small design, a high usability for the interface and the hardware interface is guaranteed. The development of the intuitive operating concept of the display with high contrast values allows good readability even at a greater distance. Language-neutral symbols and the logical color concept provide efficient information for different users.