This totally passive sensor detects the oscillations; it is installed on grilled and rigid electro welded fences, connected to the analyser LiteFENCE Lite or LiteFENCE

Protect grilled and rigid electro-welded fences

This totally passive sensor detects the oscillations of a grating or electro-welded fence when an intruder climbs over it. SV Lite sensor is placed either directly on  the grilled module or on the post, depending on the type of fence, and it detects oscillations in both direction up to 20m, so one sensor can protect up to 40m. In case of corners or fence interruptions, the oscillations are not propagated, so more sensors are necessary.

 

This system is applied to gratings and rigid electro welded fences with a min. height of 145cm.

Grilled and rigid electro-welded fences do not bend under the weight of an intruder, but, rather, move back and forth in response to the strain caused by an intruder climbing over.  LiteFENCE Lite analysers send and receive an encrypted light signal, transmitting it though a plastic fiber cable which runs along the fence. Every about 40m, the plastic fiber cable crosses a totally passive SV Lite Sensor attached to the fence. This sensor can detect the fluctuations caused by climbing attempts: inside the sensor, two fibers facing each other misalign, constrained to move only along the same axis in which the fence sways.  This misalignment interrupts light transmission and  the LiteFENCE Lite analyser triggers an alarm.

Two pre-cabled patch-cords (20m each) of plastic fiber LiteWIRE come out of every SV Lite sensor. One LiteFENCE Lite analyser can manage up to 3 SV Lite sensors in a line, interconnected to each other with a coupler. The analyser sends an encrypted light signal over the fiber and through the sensors: another analyser receives it and, in case, sends the signal over to the next one. When an intruder climbs over the fence creating oscillations, the SV Lite sensor interrupts the light signal and the analyser triggers an alarm via a normally closed relay.

Simple vibrations resulting from weather conditions or moving vehicles do not create a swing capable of completely interrupting light transmission in the fiber. Therefore the system has an excellent resistance to false alarms and does not require adjusting, new learning phases or software.

 

“It’s increadibly easy to adjust sensitivity.”

 

  • SV Lite Sensor TOTALLY PASSIVE, protects up to 40m of streight fence

  • LiteFENCE Lite analyser or LiteFENCE analyser manages up to 3 SV Lite sensors

Advantages

  • The SV Lite sensor is completely passive and is not affected by electrical discharges and lightning. It is totally insensitive to electromagnetic interferences, so it is suitable also for difficult environments.
  • 100% reliable: the system detects whenever the fence is being climbed over, remaining immune to false alarms
  • Easy to install: the sensitivity of the system can be adjusting by placing the SV Lite sensor on a higher or lower position on the fence, no need for long calibration operations. The system can work also in presence of small vegatation, cutting down on maintenance costs for vegetation
  • Simple: it can be quickly installed by anyone, since it uses LiteWIRE plastic fibre
  • Cost effective: reduces installation time and does not require maintenance over the years
  • All the area is available
  • Active also H24: people can walk nearby

 

Frequently Asked Questions

  • What type of fence is it suitable for?
  • Can I adjust the system sensitivity?
  • Where is the SV Lite sensor placed on the fence?
  • How many meters of fence can I protect with an SV Lite sensor?
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