SUB_Sense 2
Optical fiber below the groundSUB_Sense 2 creates an invisible detection zone below the ground. It detects the weight of anyone walking over it, with nothing visible on the surface.
The operating principle.
The optical fiber is laid 5–10 cm below the surface, between two protective polyethylene meshes. A person’s weight presses on the mesh, the mesh presses on the fiber, and the analyzer raises the alarm.
The shape and size of each zone are defined at installation. A zone can follow the perimeter or cover a single spot: a door, a ramp, the area around a tank.
Small animals such as cats and small dogs exert less pressure. The threshold is set so that they are ignored.
Typical applications
- High-security residences
- Embassies and public buildings
- Tanks and warehouses
- Ramps, gates and entrances
- Machinery safety zones
What you get with SUB_Sense 2.
Invisible
It can’t be seen and doesn’t give away its position. An intruder doesn’t know where the zone begins.
Any soft ground
Lawn, soil, gravel, or under rugs and other surfaces.
Zone made to measure
Along the perimeter or at a single point, with a shape defined at installation.
No electronics in the ground
Only the fiber goes into the soil, with no circuits or power cables.
Worker safety
It can signal a person entering a hazardous machinery zone.
Key specifications.
Full details in the datasheet.
SUB_Sense 2 closes the gaps a fence leaves open: gates, ramps, passages. Together with LINE_Fence 2 or FLEX_Sense 2 it adds a second line of detection inside the fence.
| Analyzer | PQ1S 2 (1 zone) or PQ2S 2 (2 zones) |
|---|---|
| Fiber length per zone | up to 200 m, with margin for 2 splices |
| Burial depth | 5–10 cm |
| Protective layer | polyethylene, 1 m wide and multiples |
| Outputs | 1 per zone + 1 tamper, NO/NC relays |
| Power supply | 9–24 V DC, up to 100 mA |
| Analyzer protection | IP65 |
| Operating temperature | −40 to +85 °C (analyzer) · −35 to +80 °C (layer) |
Brochures and datasheets.
FIBERMETRICS_SUB_Sense_2_02_Datasheet_EN.pdf EN · 248 KB PDF SUB_Sense 2 · Digital brochure
FIBERMETRICS_SUB_Sense_2_04_Brochure-Digital_EN.pdf EN · 196 KB PDF SUB_Sense 2 · Print brochure
FIBERMETRICS_SUB_Sense_2_05_Brochure-Print-Eco_EN.pdf EN · 249 KB
Greek versions: Datasheet · Digital brochure · Print brochure
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.