Radiological Engineering and Health Physics Services
Model 104G GPS Array System
Superior GPS Accuracy for up to 12 Detectors Simultaneously
The ERG 104G GPS Interface Box was developed to provide a cost-effective solution to obtaining high-density, high-accuracy gamma data from up to 12 detectors simultaneously. The data are logged to a computer or tablet and displayed in real time, allowing data validation before leaving the survey area.

When compared to traditional methods used for gamma array setups, the 104G provides enormous cost savings by combining multiple GPS receivers, antennas, and data loggers, all within a single unit.

The 104G has been used at numerous DOE and Air Force sites while saving money due to its highly efficient production rate. The system has consistently demonstrated its effectiveness by successfully finding contamination in areas previously labeled as clean.
Minimal Equipment Superior Spatial Accuracy Real-Time Mapping Software
The GPS interface box supports up to 12 detectors simultaneously and uses a single GPS antenna, eliminating the need for multiple GPS receivers, antennas, and meters. A single GPS antenna, IMU, and custom filtering techniques allow a spatial accuracy of < 10 inches and ensures the correct heading, even when making turns and traveling in reverse. The software provides a graphical interface with the ability to see collected data, set legends, load background files, and view statistics, all in real time.
104G The ERG 104G System can be used with as little as 3 detector, and up to 12 detectors simultaneously using a single high-accuracy antenna. The detector spacing and array length are easily defined in the field software which allows multiple configurations, such as ATV surveys, towed array, and even push cart.

The system significantly reduces the hardware required in all configurations when compared to traditional array setups.
  • Can be powered directly from UTV
  • Uses only a single tablet or computer for all data collection.
  • Supports all major coordinate systems
  • Data are exported to shapefile format (no third-party software)
  • Supports any detector type (2x2, 3x3, FIDLER)
  • Supports high-accuracy Trimble antennas
The software provides a real-time interface that displays the value and location of all detector data.

The software also supports customizable legends allowing personnel to bound contamination, locate hot spots, and quickly identify cable or detector problems, all while surveying.
View on rental page or download the brochure here.