Alarm on barbed wire / metal rope

All fences, included walls and picket fences, can be protected with a barbed wire on top, as a deterrent to climb over.

How to alarm barbed wire and metal rope

“LiteFENCE for barbed wire” increases the security of the barbed wire by adding a plastic fiber cable to it, which detects cut or flection in case of intrusion attempt.

Alternatively, where barbed wire is not allowed or is not possible for aesthetic reasons, “LiteFENCE for metal rope” can detect attempts to climb over. Two lines of 4mm metal rope are placed over the fence and plastic fiber LiteWIRE is attached to it and connected to LiteFENCE analyser. An alarm is triggered when the fiber is bent or cut.

The perimeter intrusion detection  system for barbed wire/metal rope is composed of 4 elements:

  • LiteFENCE: an optical analyser that sends a light signal and analyses the flow of light it receives.
  • LiteWIRE: the cable in plastic optical fiber (with anti-UV filters) which transmits the light signal
  • Tensioning bolts: opto-mechanic accessories which transform the flexion of the cable into a variation of light signal.
  • Clips: accessories affixed to brackets for keeping the plastic fiber cable attached to the barbed wire/metal rope

When an attempt of climbing over or lifting the barbed wires/metal ropes causes flections of the fiber or interrupts it, the optical analyser LiteFENCE detects the variations of the light signal and an alarm goes off. After that, if the fiber has remained intact, the system re-sets automatically, adapting to the (new) position.

Wind and vibrations, due to weather conditions or vehicles passing by do not generate alarms, because the barbed wire/metal rope does not bend.  For this reason, the installation of the perimeter protection system is simple, free of false alarms and does not require the learning of any software program, ensuring a ‘stop to false alarms’

The sensitivity of the LiteFENCE analyser can be easily set to one of the 4 sensitivity levels.

A user-friendly, built-in Power Meter helps the installer check if the fiber has been placed correctly thoughout the installation.

Excellent for securing existing walls!

  • Analyser LiteFENCE

  • Type of plastic fiber LiteWIRE Simplex Anti-UV

  • Affixing elements (with barbed wire) Tensioning bolts (one every 10m) and clips (one every 2 m)

  • Affixing elements (with metal rope) Tensioning bolts (one every 4m) and clips (one every 2m)


  • Anyone can install the system easily and quickly
  • No false alarms are caused by weather conditions
  • No maintenance or adjusting required after installation (slow changes, like temperature changes, growth of vegetation and aging of components, are automatically adjusted)
  • Suitable for sloping and terraced grounds too.
  • No need for long calibration operations or vegetation maintenance
  • Plastic fiber is easy to repair ( around 30 seconds for a connector)
  • All the area is available
  • Active also H24: people can walk nearby

Frequently Asked Questions

  • Do birds cause false alarms?
  • What alarm panels are suitable for this perimeter protection system?
  • Can I apply this fence alarm to razor wire concertinas?
  • How many meters of fence can I protect with one LiteFENCE analyzer?
  • Do you provide brackets for barbed wire/metal rope?
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