Exploration Seismograph GEA 24 - NEW !!!

Product catalog summary

Overview: The PASI MOD. GEA 24 is a compact 24-channel seismograph with a 24-bit acquisition board, suitable for various geophysical applications such as refraction, shallow reflection, surface waves, HVSR/vibrations, downhole, and crosshole applications. It can be expanded to 48 channels by serializing two units.

Technical Specifications:

Channels: 24 channels plus a trigger (AUX channel), expandable to 48 channels.
Data Conversion: 24-bit Sigma-Delta ADC compatible with analog geophones.
Sampling Intervals: Active acquisitions up to 125 microseconds on 24 channels and 31.25 microseconds on 6 channels; passive acquisitions up to 4000 microseconds on 24 channels and 500 microseconds on 3 channels.
Acquisition Length: 27,500 samples at 24 channels, 174,500 samples at 3 channels, unlimited for continuous acquisitions.
Preamp Gain: 0/52 dB, selectable via software.
Input Impedance: 2MOhm // 22nF.
S/N Ratio: 117 dB at 1 ksps.
Distortion: 0.007% at 16 kHz.
Bandwidth: -3dB and +/- 0.1dB specifications provided for various sampling rates.
Filters: Low Pass (125-1000 Hz), High Pass (10-400 Hz), Notch Filter (50-60 Hz + harmonics).
Trigger: Various options including normally closed/open contact, analog signal, and TTL triggering with adjustable sensitivity.
Interface: USB 2.0 for external PC connection.
Data Format: SEG2, SAF, with other formats available on request.
Power Supply: 5VDC from USB, 0.25A.
Operating Conditions: Temperature range from -30°C to +80°C, 80% relative humidity non-condensing.
Dimensions and Weight: 24cm x 19.5cm x 11cm, 2 kg.

Accessories: Includes seismic cables, horizontal and vertical geophones, 3D land and borehole geophones, striking plate, seismic energizer, GPS option, and radiotrigger.

Contact Information: P.A.S.I. S.R.L., Via Galliari 5/E, 10125 Torino, Italy. Phone: +39 (0)11 6507033, Email: [email protected], Website: www.pasigeophysics.com.

Catalog excerpts

Exploration Seismograph GEA 24 - NEW !!!-1

units can be serialized for a total of 48 chs) with a 24 bit acquisition board and USB interface for external PC (not included).Suitable for so many applications, GEA-24 is a really affordable solution for all professional uses. • SHALLOW REFLECTION • SURFACE WAVES (MASW, Re.Mi., Vs30, MAAM, ESAC, etc.) • DOWNHOLE (with borehole 3D- geophones Mod.GFA or DHTG) • CROSSHOLE applications (with borehole 3D geophones Mod.GFA or DHTG + P/S wave borehole seismic source Mod.CHE) Acquisition Configuration Geophones Config Configured Template Acquisition Config P.A.S.I. S.R.L. — Via Galliari 5/E — 10125 Torino - Italy

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Exploration Seismograph GEA 24 - NEW !!!-2

24-CHANNELS SEISMOGRAPH - 24 BITS PASI MOD. GEA 24 www.pasigeophysics.com TECHNICAL SPECIFICATIONS GEA 24 Number of channels 24 chs + trigger (AUX ch) - 2 units can be serialized for a total of 48 chs Data Conversion 24 real bits Sigma-Delta ADC (compatible with analog geophones of any resonance freqency) Sampling intervals Active Acquisitions: - up to 125 microsec (8000sps) on 24 chs, - up to 31.25 microsec (32000sps) on 6 chs Passive Acquisitions: - up to 4000 microsec (250sps) on 24 ch - up to 500 microsec (2000sps) on 3 chs Acquisition length 27500 samples @ 24 chs (+aux) 174500 samples @...

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