An affordable solution for your seismograph needs, the compact and robust GEA24 system is your go-to for a wide array of professional seismic applications, such as refraction, shallow reflection, surface wave inversion methods (MASW, ReMi, Vs30, MAAM, ESAC, among others), horizontal-to-vertical spectral ratio, and cross-hole and downhole seismic tests. GEA24 is a compact-sized 24 channel seismograph (can be serialized for a total of 48 channels) with a 24-bit data acquisition board and USB interface for external PC (not included in the standard supply). Connected to your PC laptop or tablet, GEA24 becomes a seismic tool that is simple to use but with top-level performance. An external 12V battery (heavy and bulky) no longer needed: GEA24 consumes very little and is powered directly from the PC, guaranteeing a long day of work on-site. It can acquire data using geophones with any resonance frequency. To get 48 simultaneous channels, just connect two GEA24s to the same PC, perhaps using the Radiotrigger accessory and using a land streamer or a hydrophone chain. Versatility is what makes this our best selling product.