Detecting mechanical disturbance with optical fiber.
Every FIBERMETRICS system is built on the same principle: it measures what happens to the fiber, not what can be heard around it.
What the analyzer measures.
The analyzer sends light into one end of the fiber and receives it at the other. When the fiber is pressed, bent or stretched, the amount of light that arrives changes.
The analyzer distinguishes the short, sharp change of an intrusion attempt from the slow drift caused by temperature and ageing. That’s why it calibrates itself automatically, also during operation.
Sensitivity is set independently for each zone, from presets or in detail from a laptop.
Know where it happened.
Each analyzer channel is one zone, with up to 300 m of fiber. The PQ1S 2 has one zone, the PQ2S 2 has two. Each zone has its own output, so the panel knows where the attempt took place.
Zones are not tied to a specific type of attempt. They are defined in the site study, according to the geometry of the perimeter.
Closed loop or analyzer chain.
Closed loop
The fiber starts at the analyzer, runs along the zone and returns to the same analyzer. The simplest layout for small and medium perimeters.
Daisy chain
The fiber takes light from the first analyzer and ends at the input of the next. Large perimeters are covered with fewer fiber runs. Analyzers are not electrically connected to each other.
No special instruments.
The FIBER_Core FC-1 polymer fiber is cut with the tool and goes straight into the analyzer. No fusion splicing, no connectors, no polishing. A cut fiber is repaired on site with a splice connector.
Even where there is no power.
The fiber needs no power. At remote locations the analyzer can run from a small solar panel and battery. Alerts reach your alarm panel through a compatible wireless transmitter.
What exactly does a fiber-optic system detect?
It detects mechanical disturbance of the fiber: pressure, bending or stretching. The analyzer sends light into the fiber. When the fiber is disturbed, the light that returns changes. The analyzer evaluates the change and raises the alarm.
How many metres does one analyzer cover?
Up to 300 m of optical fiber per zone for LINE_Fence 2 and FIBER_Wire 2, and up to 200 m for SUB_Sense 2. The PQ2S 2 has two zones. The actual perimeter length depends on the number of fiber lines decided in the site study.
How many fiber lines do I need on my fence?
It depends on your requirements. For a 2 m fence: one line for basic monitoring, two for the standard application, three or four for higher requirements. More lines leave an intruder less room to get through without disturbing the fiber.
Does it connect to the alarm panel I already have?
Yes. The analyzers provide relay outputs (NO/NC) for each zone and for tamper. They connect to any alarm panel, or directly to floodlights and sirens.
Do I need power along the fence?
No. The fiber is passive and carries no current. Only the analyzer needs 9–24 V DC. At remote locations, off-grid operation is possible with a small solar panel, a battery and a wireless transmitter compatible with your alarm panel.
What happens if the fiber is cut?
The analyzer alerts immediately. Repair is done on site with a splice connector, without special instruments. Each zone has margin for at least two splices.
Who carries out the site study and installation?
The study is carried out by ErgoAlarm Defense together with your installer. Send us the fence type and length and, if possible, a site plan or photos.
Let’s look at your perimeter.
Send us the fence type and length. We’ll propose a solution and the number of zones, with a quote.