Data acquisition in the field is the first stage of the Helium survey project. Its objective is to measure the Helium flow in several points of a certain area. In this sense, it is necessary that the AGI's technician go to the field and do the measurements in situ.  The equipment required is a portabke Helium gas detector, a computer and a simple trado. 60 measurements are done in each point, 30 in the subsoil, at a depth of 1 meter maximum, and 30 in the surface.