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

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 @...