The EM31 ground survey equipment maps geological variations, groundwater contaminantion, or any subsurface feature associated with changes in the ground conductivity using a patented electromagnetic inductive technique that makes the measurements without electrodes or ground contact. With this inductive method, surveys can be carried out under most geological conditions including those of high surface resistivity such as sand, gravel and asphalt, providing an ideal groundwater monitoring solution.

The EM31 Mark II comes with its own on-board data-logging system. There is no need to rent a seperate Allego unit!