Side-by-side
PIR Passive Infrared Sensor vs GS-20 Underground Sensor
Spec comparison for two products on Aviation Souk. Both compete in perimeter-security.
perimeter-security
PIR Passive Infrared Sensor
by exensor
Rapidly deployable passive-infrared thermal barrier detecting moving targets and their direction of travel.
perimeter-security
GS-20 Underground Sensor
by vortex-systems
Buried seismic and magnetometer intrusion sensor with 5-Watt VHF reporting up to 35 miles line-of-sight
| Cost of ownership | PIR Passive Infrared Sensor | GS-20 Underground Sensor |
|---|---|---|
| Price tier | — | — |
| Lead time (weeks) | ?–? | ?–? |
| Delivery | — | — |
| Install | — | — |
| GCC airports deployed | 0 | 0 |
| Certifications | 2 | 0 |
Specs
Technical specifications.
| Spec | PIR Passive Infrared Sensor | GS-20 Underground Sensor |
|---|---|---|
| Sensing modality | Passive infrared (thermal barrier), detects moving targets and direction of travel | — |
| Architecture | Module Core unit (integrated radio, GPS, battery) + interchangeable PIR module | — |
| PIR modules | Three variants - short, medium, long range - with different detection ranges and fields of view | — |
| Sensitivity | Three remotely configurable sensitivity levels | — |
| Dimensions (short module) | 63 x 74 x 185 mm | — |
| Dimensions (medium module) | 63 x 74 x 208 mm | — |
| Dimensions (long module) | 63 x 74 x 265 mm | — |
| Weight (short / medium / long) | 0.58 / 0.59 / 0.80 kg | — |
| Battery life | 30 days integrated rechargeable; 1-year battery option; external battery connectable | 1+ year (deployment 3 months to 1 year or longer depending on configuration) |
| Radio | Integrated 1 km mesh-networked radio; node relays data from other sensors | Built-in 5 W VHF, programmable RF output power, strong foliage penetration |
| Expansion | One additional PIR module connectable to the Core module; PIR module can be remoted on cable or attached to any other Flexnet sensor via multi-connector | — |
| Interfaces | Input/output signals | — |
| Encryption | AES-256; alarm data stored in device in radio-silence mode until retrieved | — |
| Positioning | GPS for self-localisation | — |
| Anti-tamper | Built-in anti-tamper with GPS | — |
| Operating temperature | -32 to +71 degC | — |
| Environmental standard | MIL-STD-810 | — |
| EMC standard | MIL-STD-461 | — |
| Sensing modalities | — | Internal seismic (pedestrian) + internal magnetometer (vehicle presence and travel direction) |
| External sensor inputs | — | PIR and contact-closure via configurable external connector |
| Sensor fusion | — | Up to 5 sensors |
| Radio range | — | Up to 35 miles line-of-sight |
| Alarm codes | — | Up to 15 unique |
| Sensor address range | — | 1-9999 |
| Power | — | 8-20 VDC |
| Dimensions | — | 6.5 x 3 x 3 in |
| Enclosure | — | Watertight, corrosion-proof fiberglass-reinforced polyester with silicone foam gasket |
| Deployment | — | Buried (antenna only above ground) or above-ground |
| Output | — | Mechanical relay to trigger external devices (cameras, lights, sirens) |
| Security | — | Internal tamper switch |
| Timing | — | Real-time clock; programmable self-test messages and scheduled access windows |
| Networking | — | Stand-alone or networked; Coyote/Cub relay mode; compatible with legacy Vortex and Monitron systems |
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