Geomics EM 34-3The EM34-3 is a simple-to-operate, cost-effective instrument for the geologist and hydrogeologist alike; applications have been particularly successful for the mapping of deeper groundwater contaminant plumes and for the exploration of potable groundwater resources. Using the same inductive method as the EM31-MK2, the EM34-3 uses three intercoil spacings – 10, 20 and 40 m – to provide variable depths of exploration down to 60 meters. With three spacings and two dipole modes (horizontal as shown, and vertical), vertical electrical soundings can be obtained