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Variable coding sealing system electronic seal (VACOSS-S)

The VACOSS seal is a type of electronic seal used by the IAEA.

The VACOSS seal consists of a seal body containing the electronic circuitry and battery of fiber optic cable and an interface box to provide communication between the seal and the reader. The VACOSS seal employs an active fiber-optic light source, sending light pulses through the fiber optic cable and monitoring the retrieved signal. The seal is reusable and is mainly used for applications where multiple openings and closings are expected or when the seal is combined with a remote monitoring system. 

Vacoss5

(Photo source: Canberra)