The monitoring system consists of passive optical detectors installed at required places and a monitoring (interrogation) unit located at a remote site. The connection between them is via standard telecommunication optical fibers, such as dark fibers of an existing fiber optic network. The distance between the unit and detectors can be several tens of kilometers. Therefore you can cover a large area with one unit and lots of detectors.
The passive optical detectors have been specifically designed to detect various methods of attacking protected structures and to reject known environmental activity and potential false alarm scenarios.
Our fiber optic sensing system for monitoring manholes, cabinets, entrances, and shafts is the most economical solution for monitoring many objects spread over a large area without needing an electricity supply.