The geo-resistivity meter Syscal R2 unit is a high-power system designed for DC electrical surveys applied to groundwater exploration, environmental studies, civil engineering, structural geology investigation and mineral exploration. This system uses an external DC source for the injection: A 250W DCDC converter supplied by a 12V battery – A 1200W AC/DC converter supplied by a standard motor generator. The Syscal R2 combined with the 1200W converter is therefore particularly adapted to reach high depth for groundwater exploration. It can be used with an external Switch Pro box. It can be used for civil engineering, groundwater and environmental projects, to solve problems such as depth-to-bedrock determination, localization of weathered bedrock. Its power makes it adapted to detect fault in fractured bedrock aquifers and to explore groundwater aquifers (depth and thickness).