To meet the need for a fast, accurate, non-nuclear soil density/compaction and moisture gauge, TransTech Systems has developed an innovative alternative, the electrical impedance-based Soil Density Gauge (SDG) for use as a QC tool during the soil compaction process. The SDG is designed to eliminate unit licensing and certification associated with nuclear materials usage. No special operator training/certification or radiation monitoring requirements are necessary. The unit is user friendly and cost effective for any crew member. Unit provides GPS logging for database management and offers fast, reliable and repeatable readings in real time.