The Pulse GBS ( Pulse Ground Balancing System ) is specialy suitable for searching at depth. The performance of this electronic device is almost unaffected by salt water, most types of mineralised grounds or temperature changes. Specially designed electronics cancel out signals from the ground. The Lorenz Deepmax X5 is therefore a reliable tool to locate metal objects at great depths even under the worst environmental conditions. A new improved circuit design suppresses interference from power lines and a power pulse technique produces very accurate signals to obtain very high detection depths.