FiberPDS sensor is a system used to monitor the integrity of the network infrastructure against intrusions and tampering. AP Sensing's Distributed Acoustic Sensing (DAS) technology delivers real-time perimeter and border protection by transforming standard optical fibers into dense acoustic sensor arrays. Our innovative ONYX™ products empower. Fiber optic networks are the backbone of modern communication and control systems, both in telecommunications, rail and road transport, and in energy and industrial infrastructure. At the same time, they are sensitive to external influences such as moisture, mechanical damage, kinks, or. Fiber SenSys®, Inc.