Side-by-side
Senstar FlexZone vs GS-21 Underground Sensor
Spec comparison for two products on Aviation Souk. Both compete in perimeter-security.
perimeter-security
Senstar FlexZone
by Senstar Technologies
Ranging fence-mounted coaxial sensor with metre-level localisation — up to 600 m per processor.
perimeter-security
GS-21 Underground Sensor
by vortex-systems
Buried UGS with external seismic line-string support for extended pedestrian detection along a perimeter
| Cost of ownership | Senstar FlexZone | GS-21 Underground Sensor |
|---|---|---|
| Price tier | — | — |
| Lead time (weeks) | ?–? | ?–? |
| Delivery | — | — |
| Install | — | — |
| GCC airports deployed | 0 | 0 |
| Certifications | 0 | 0 |
Specs
Technical specifications.
| Spec | Senstar FlexZone | GS-21 Underground Sensor |
|---|---|---|
| Sensor type | Fence-mounted ranging sensor, loose-tube coaxial cable | — |
| Range per processor | Up to 600 m | — |
| Localisation | +/-3 m | — |
| Detection zones | Up to 60 distinct, individually sized software-defined zones per processor | — |
| Multiple simultaneous intrusions | Accurately located, including in background environmental noise | — |
| Signal processing | High-speed sampling with location data; algorithms differentiate point disturbances (real intrusions) from spatially distributed disturbances (wind, rain) | — |
| Nuisance alarm mitigation | EDAPT: precision ranging accounts for background environmental noise near a disturbance before alarming; implemented per processor, networked or not | — |
| Sensitivity | Per-meter sensitivity leveling adapts to changes in fence construction and response | — |
| Cable cut resilience | Protection continues in the event of a cable cut | — |
| Sensor cable | Loose-tube coaxial; carries both power and data, reducing power-distribution and comms cabling; armored version for barbed wire, concertina and damage-prone areas; attached with UV-resistant cable ties | — |
| Fence compatibility | Chain-link, standard welded mesh, expanded metal mesh, palisade; non-standard fences and interior/exterior walls also possible | — |
| Processor | Outdoor-rated, mounts on a fence post or other surface; most perimeters installed in a day | — |
| Gate protection | Cable installable on swinging gates as an independent zone; gate latches monitored via on-board auxiliary input; sliding gates via Wireless Gate Sensor or UltraWave | — |
| Communications | On-board relay outputs and auxiliary inputs; Ethernet, RS-422 and fiber optic communication cards; network shareable with other Senstar sensors | — |
| Configuration | Windows-based software over USB or network connection | — |
| AI readiness | Senstar Sensor Fusion Engine ready - AI-based added detection and nuisance-alarm rejection for high-risk or problematic perimeter sections | — |
| Integration | Network Manager provides a common unified interface to Senstar video/security management and third-party systems | — |
| Certification | FlexZone-60 certified by UK NPSA against version 6.0 of the NPSA Barrier Mounted PIDS Standard | — |
| Sensing modalities | — | External seismic line strings (pedestrian) + internal magnetic sensor (vehicle presence and travel direction) |
| External sensor inputs | — | PIR (pedestrian/vehicle presence + travel direction) and contact-closure |
| Radio | — | Built-in 5 W VHF, strong foliage penetration |
| Radio range | — | Up to 35 miles line-of-sight |
| Battery life | — | 1+ year |
| Output | — | Mechanical relay to trigger external devices (cameras, lights, sirens) |
| Security | — | Tamper switch |
| Timing | — | Real-time clock; programmable self-test messages and scheduled access windows |
| Compatibility | — | Legacy Vortex and Monitron systems |
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