Fiber Optic Sensors

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OPTEX’s fiber optic sensors are manufactured by FiberSensys, a group company of OPTEX and the only fiber sensor manufacturer offering products compliant with the U.S. Air Force’s PL-1 security standard. These sensors provide advanced perimeter protection solutions and have been trusted for over 25 years in the critical sites.

Fiber optic sensors are one of the core technologies used in Perimeter Intrusion Detection Systems (PIDS), and are particularly well-suited for environments that demand high security or involve harsh installation conditions. With advanced signal processing, false alarm reduction capabilities, and exceptional durability, these sensors are deployed globally in critical sites such as military facilities, energy infrastructure (including power plants and gas facilities), transportation hubs (such as airports and seaports), and data centers.

The detection mechanism is based on laser pulses transmitted through fiber optic cables installed along fences or other perimeter structures. When external vibrations or pressure are applied to the cable, the characteristics of the light traveling through it change. These changes are continuously monitored by the Alarm Processing Unit (APU), which uses advanced algorithms to analyze and classify the signals. The system is programmed to generate alarms only in response to disturbances caused by actual intrusion attempts —such as climbing over or cutting the fence— while ignoring environmental factors like wind, nearby traffic vibrations or small animal movements.

Series Fiber Defender (FD) 300 series FD500 series Point Defender Terrain Defender EchoPoint series
Models FD322 FD331/2 FD341/2 FD504/8 FD525 PD500 TD100 EchoPoint EP9300™
Fence Application -
Wall Application - -
Buried - - - - - -
Point Location - - - - - ±1m ±1m ±6m
APU Remote Installation - - 20km 5km 5km - -
IP-enabled Option Option
Number of channels (zones) 2 1 / 2 1 / 2 4 / 8 25 Programmable Programmable Programmable
Max. sensing cable per zone 500m 5km 5km 800m 800m Programmable Programmable Programmable

Product Lineup



EchoPoint EP9300™

EchoPoint EP9300™ Fibre optic sensor

  • 2 sensors per controller​
  • Maximum fiber opticsensor length of up to 100km per processor with +/-6m of location accuracy
  • APU can be installed in hybrid layout from the same detector
  • Processor Redundancy model is available (Optional)
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FD 525 Fiber Optic Sensor

  • Fiber Optic Vibration Sensor with 25 zones
  • ● Supports up to 25 zones, each fully independent and adjustable
  • ● Sensor cable length up to 800 meters per zone
  • ● Max insensitive lead-in cable length up to 5km
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FD508 Fiber Optic Sensor

  • Fiber Optic Vibration Sensor with 8 zones
  • ● Up to 8 fully independent zones
  • ● Durable fiber-optic sensing
  • ● Can be fully integrated with any system solution
  • ● Includes custom tuning software
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