Side-by-side
Flexnet Modem (3G/4G) vs GS-20 Underground Sensor
Spec comparison for two products on Aviation Souk. Both compete in perimeter-security.
perimeter-security
Flexnet Modem (3G/4G)
by exensor
0.6 kg gateway-powered 3G/4G modem giving Flexnet sensor fields worldwide encrypted-VPN reachback.
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 | Flexnet Modem (3G/4G) | GS-20 Underground Sensor |
|---|---|---|
| Price tier | — | — |
| Lead time (weeks) | ?–? | ?–? |
| Delivery | — | — |
| Install | — | — |
| GCC airports deployed | 0 | 0 |
| Certifications | 2 | 0 |
Specs
Technical specifications.
| Spec | Flexnet Modem (3G/4G) | GS-20 Underground Sensor |
|---|---|---|
| Function | Extends Flexnet communications worldwide via 3G/4G cellular | — |
| Modem type | 3G/4G | — |
| Channel | Larger data volumes over a point-to-multipoint communication channel | — |
| Security | Encrypted VPN connection; AES-256 encrypted communication | Internal tamper switch |
| Power | Powered by connected Gateway; no battery or additional power supply required | 8-20 VDC |
| Dimensions | 85 x 36 x 160 mm | 6.5 x 3 x 3 in |
| Weight | 0.6 kg | — |
| 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 | — | Built-in 5 W VHF, programmable RF output power, strong foliage penetration |
| Radio range | — | Up to 35 miles line-of-sight |
| Alarm codes | — | Up to 15 unique |
| Sensor address range | — | 1-9999 |
| Battery life | — | 1+ year (deployment 3 months to 1 year or longer depending on configuration) |
| 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) |
| 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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