Gea3 is a 24-bit real data acquisition seismograph in a waterproof container.
This small, extremely lightweight instrument is equipped with 3 channels+one displayable trigger channel and is the perfect solution for a variety of applications:

DOWN-HOLE seismic measurements with the use of a 3D well geophone (such as PASI Mod.GFA or Mod.DHTG)
CROSS-HOLE seismic measurements combined with a 3D well geophone (such as PASI Mod.GFA or Mod.DHTG) and a P/S hole energizer small-scale seismic refraction with surface geophones and 3-channel seismic cable MASW and Vs30 profiles with a special triaxial geophone.

Gea3, connected to a computer via USB interface, allows for the acquisition, saving and later data analysis directly from your computer by means of special supplied software.