Sentinel GEO is a premium quality accelerograph plus velocigraph.
Small and light, it integrates a triaxial 85dB MEMS accelerometer (self-noise < 18 µg/√Hz) plus a triaxial set of 4.5Hz geophones.
Sentinel GEO has a 24bit resolution with adjustable sample rate up to 500Sps per channel (synchronous sampling).
Miniseed data is stored in internal memory (from 32Gb up to 256Gb) with a ring-buffer structure.
The GNSS receiver is integrated and so are the WiFi module and, additionally the 3.5G or LTE Cat M1 /NB1 modem is available on request. The Sentinel comes 5G-ready.
Sentinel GEO uses sophisticated trigger criteria that distinguishes false events from true seismic events.
An internal 18650 Li-Ion battery prevents the machine from switch off in case of power cut for at least 5 hours.
Sentinel GEO has a seedlink server.
Sentinel GEO with 1 second and 2 seconds velocity sensor (electronically extended bandwidth) is schedules.
Local and Regional Seismic Monitoring
The enhanced dynamic range and the tuned sensors make the Sentinel GEO ideal for the local or regional seismicity monitoring.
Structural Health Monitoring
Structural health monitoring is one of the main applications of Sentinel GEO.
With tall buildings, where heavy oscillations excite the structure and the amplitude of physical signals is considerable, Sentinel performs well even if its dynamic range cannot compete with that of Triton’s.
In a scenario like this, the only high dynamic (and thus more expensive) accelerograph is placed on the ground floor, where the oscillations of the structure are negligible.
Sentinel and Triton can be interfaced and controlled using our software for Structural Health Monitoring, Asclepius.
A real-time report of the building and a post-earthquake evaluation of the structural damage can be locally displayed or trasmitted remotely.
Early Warning System
Earthquake early warning concept is the rapid detection of earthquakes and the alerting of people to shaking.
Sentinel GEO can detect the non-damaging P-waves and transmit the information about tremors to an alarm center or directly to predefined users before the most damaging S-waves arrive.
Induced Seismicity refers to low magnitude earthquakes caused by human activity that alters the stresses and strains on the Earth’s crust.
Sentinel GEO is suitable for this kind of survey.