Side-by-side
Pathfinder Unattended Ground Sensors (Mini / XL) vs GS-21 Underground Sensor
Spec comparison for two products on Aviation Souk. Both compete in perimeter-security.
perimeter-security
Pathfinder Unattended Ground Sensors (Mini / XL)
by ara
Combat-proven expendable seismic ground sensors for covert, gateway-free perimeter early warning
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 | Pathfinder Unattended Ground Sensors (Mini / XL) | GS-21 Underground Sensor |
|---|---|---|
| Price tier | — | — |
| Lead time (weeks) | ?–? | ?–? |
| Delivery | — | — |
| Install | — | — |
| GCC airports deployed | 0 | 0 |
| Certifications | 0 | 0 |
Specs
Technical specifications.
| Spec | Pathfinder Unattended Ground Sensors (Mini / XL) | GS-21 Underground Sensor |
|---|---|---|
| Sensing modality | Seismic — human footstep and off-road vehicle detection with intelligent machine-learning classification algorithms | — |
| Footstep detection radius | up to 10 (seismically quiet environments, proper emplacement) m | — |
| Light off-road vehicle detection radius | up to 20 (ATVs, dirt bikes) m | — |
| Transmission range | typically up to 10 (terrain dependent; no gateways, repeaters or relays; elevated receiver antenna greatly increases range) km | — |
| Radio versions | Low-power FCC-approved radio (up to 1 km) or high-power radio (up to 10 km); factory set at time of order | — |
| Operating frequencies | Six regional options covering US/Canada, EU, Africa, India, South Korea and South America; factory set by deployment location | — |
| Transmit frequency (US datasheet variant) | 916 MHz at 0 dBm output; FCC waiver available to 20 dBm for certain domestic applications | — |
| Mini — dimensions | 2.6 in diameter x 2.2 in height | — |
| Mini — weight | 0.5 lb | — |
| Mini — batteries | 2 x 3.6 V lithium-ion (embedded) | — |
| Mini — battery life | up to 6 months | — |
| XL — dimensions | 2.6 in diameter x 4.75 in height | — |
| XL — weight | 1.0 lb | — |
| XL — batteries | 8 x 3.6 V lithium-ion (embedded) | — |
| XL — battery life | up to 24 months | — |
| Current draw | <2 uA off; <600 uA on; 250 mA peak during transmission | — |
| Battery-life basis | No more than 50 alerts/day in moderate temperatures; extreme high/low temperatures reduce battery life | — |
| False-alarm discrimination | Rain-filtering algorithms; discriminates small animals (dogs, groundhogs); occasional false alarms for large quadrupeds (horses, cows) | — |
| Link architecture | Line of sight, non-line of sight and beyond line of sight capable; no internet required | — |
| C2 integration | Seamless integration with Tactical Assault Kit (TAK); camera slew-to-cue and UAS fly-to-cue via ARA interface control document (ICD) | — |
| Scalability | Single facility to large areas (square miles); additional sensors integrate seamlessly into an existing kit | — |
| Export classification | ECCN 6A999.a under US Export Administration Regulations; export licence may be required depending on destination, user and end use | — |
| 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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