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GEA 3

Product catalog summary

Overview: The PASI MOD. GEA 3 is a compact 3-channel seismograph designed for various geophysical applications, including downhole, crosshole, small-scale refraction, MASW, Vs30 acquisitions, foundation studies, and excavation cost evaluation. It features a 24-bit acquisition board with a USB interface for connection to an external PC.

Applications:

Downhole and crosshole applications using borehole triaxial geophones (Mod.GFA or Mod.DHTG).
Small-scale seismic refraction and surface wave analysis.
MASW and Vs30 acquisitions with 3D-Land Geophones.
Foundation studies and excavation cost evaluation.

Technical Specifications:

Model: GEA 3
Number of signals acquired: 3 channels + trigger
Data Conversion: 24 real bits A/D Sigma-Delta
Sampling frequencies: 20, 100, 200, 500, 1000, 2000, 4000, 8000 Hz
Acquisition duration: from 250 ms to 30 minutes
Stacking: Selectable up to 20 stack
Input impedance: 2 MΩ
S/N ratio: Max. 117db
Passband at +/- 0.1 dB: 108 Hz
Passband at -3dB: 212 Hz
Trigger sensitivity: Adjustable
Display mode: Wiggle-trace / variable area
Noise-monitor: Real-time “cascade” display
External connection: 1x USB port
Automatic calibration: Yes
Data format: SEG2, SAF
Power supply: Through USB connection
Operating temperature: -25°C to +55°C
Dimensions: 21 cm x 17 cm x 9 cm
Weight: > 1 Kg

Available Accessories:

Borehole 3D Geophones
Seismic Cables
Horizontal and Vertical Geophones
Striking plate for “P and/or “S” waves
Seismic Energizer “ISOTTA”
Crosshole energizer
Starter Geophone
Shielded cable for starter geophone/hammer switch
Mallet

Software: The GEA 3 acquisition software is available in English, French, Spanish, and Italian, providing a user-friendly interface for data collection and analysis.

Catalog excerpts

3-CHANNEL SEISMOGRAPH PASI MOD. GEA 3 www.pasigeophysics.com GEA3 is a compact-sized 3-channel seismograph with a 24 bit acquisition board with USB interface for external PC (not included). Suitable for Downhole and Crosshole applications, it’s perfect also for small scale seismic refraction and surface waves analysis Compact-sized Reliable Easy to use DOWNHOLE (with borehole triaxial geophones Mod.GFA or Mod.DHTG) CROSSHOLE applications (with borehole triaxial geophones Mod.GFA or Mod.DHTG + P/S wave borehole seismic source) Small scale REFRACTION Foundation studies MASW and Vs30 acquisitions with 3D-Land Geophones GEA 3 Acquisition software “screenshot” Evaluation of excavation cost Software available in: English - French - Spanish - Italian P.A.S.I. S.R.L. — Via Gallia

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• Crosshole energizer • Starter Geophone • Shielded cable for starter geophone/hammer switch • Mallet 3 CHANNELS SEISMOGRAPH PASI MOD. GEA 3 www.pasigeophysics.comTECHNICAL SPECIFICATIONS GEA 3 Model • Seismic Cables • Horizontal and Vertical Geophones • Striking plate for "P and/or "S” waves • Seismic Energizer "ISOTTA” P.A.S.I. S.R.L. — Via Galliari 5/E — 10125 Torino tel. +39 011 6507033 — fax +39 011 658646 e-mail: [email protected] web: www.pasisrl.i

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