Capability
Why Go Underground
Fully Concealed
Buried sensors give no visual indication of a detection zone, denying reconnaissance value to an intruder.
Weather Immune
Unaffected by wind, rain, or sandstorm conditions that challenge above-ground sensors.
Digging Detection
Detects tunneling and digging attempts, a gap most above-ground PIDS technologies cannot cover.
Flexible Geometry
Can be routed around obstacles and terrain features that complicate fence-line sensors.
Use Cases
Where Seismic Sensing Fits
High-Value Asset Perimeters
A concealed inner detection ring around control rooms and critical equipment yards.
Approach Corridors
Early warning along access roads and approach paths before an intruder reaches the fence.
Class 1-2 Facilities
Commonly specified as a redundant layer for the highest HCIS facility classifications.
FAQ
Underground Seismic Sensors - FAQ
How deep are seismic intrusion sensors typically buried?
Geophone-based seismic sensors are generally buried a shallow depth below grade, close enough to the surface to register footstep and digging vibration clearly while remaining fully concealed from visual inspection.
Can underground seismic sensors detect vehicles as well as people?
Yes. Vehicle movement produces a distinct, higher-amplitude vibration signature than foot traffic, and modern seismic processing can classify and differentiate between the two to reduce false categorization.
Do buried seismic sensors need line of sight like radar or LiDAR?
No. Because detection is based on ground-transmitted vibration rather than optical or radio line of sight, buried seismic sensors are unaffected by terrain undulation, vegetation, or structures that would block other sensing technologies.
