Elster UNICOM III probes are a family of portable optical (infrared) communication interfaces. UNICOM III probes are used for transferring digital information between Elster electronic meters and various reader/programmer equipment manufactured by Elster and other companies.
Elster offers the UNICOM III probe with the standard two-element ANSI probe interface, the standard two-element for IEC FLAG port interface, and two-element Euro-Probe for IEC FLAG port interface.