The Electrical Density Gauge (EDG) is a nuclear-free alternative for determining the moisture and density of compacted soils used in road beds and foundations.
The EDG is a portable, battery-powered instrument capable of being used anywhere without the concerns and regulations associated with nuclear safety.
Its user-friendly, step-by-step menu guides the user through each step of the testing procedure and cautions the user when values do not correspond to established curves for the material being tested.
Easy-to-use, the EDG can be used as a construction aid to monitor day-to-day compaction operations by providing performance and measurement results highly comparable to those achieved with traditional methods, including the nuclear gauge and/or a sand-cone and oven moisture test combination.
When conducting a test, the EDG measures and displays the results for wet and dry density, gravimetric moisture content and percent compaction.

Model SR-4500
| Wet Density Range | typical compacted earth sites range |
| Dry Density Accuracy | within 3% of standard tests |
| Moisture Content Range | typical compacted earth sites range |
| Moisture Content Accuracy | within 2% of standard tests |
| Operating Temperature | 0-50°C |
| Ambient Operating | Humidity 5-90%, non-condensing |
| Battery | 2000mAh Ni-MH , 12V |
| Battery Life | approx. 12 hrs. of runtime |
| Battery Charger | 110-240 V 50/60Hz |
| Dimensions | 600×460×370mm |
| GPS | ± 3m (Optional) |
| Gross Weight | 10kg |
