104G Multi-Detector Array System

Superior GPS accuracy and real-time display for up to 12 detectors simultaneously

Our system offers huge cost savings when performing high-density surveys requiring multiple detectors

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.

Simplified Design

The GPS interface box supports up to 12 detectors simultaneously and uses only two GPS antennas, eliminating the need for multiple GPS receivers and meters.

Superior GPS Accuracy

A dual GPS antenna setup and a subscription to all major satellites provides a spatial accuracy of < 0.5 meter and ensures the correct heading, even when making turns and traveling in reverse.

Real-Time Results

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.

Flexible Hardware

All the benefits of multiple detectors in a single system

The ERG 104G System can be used with as little as 3 detector, and up to 12 detectors simultaneously using two high-accuracy antennas. 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.


Powerful Software

Our software was designed to simplify the surveying process while maximizing efficiency and minimizing errors

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.


Powered directly from UTV or standalone battery

Uses a single laptop

Supports all major coordinate systems

Export to shapefile or CSV format

Supports all Ludlum gamma detectors

Sub-meter GPS accuracy

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