108G IsoMap MCA Survey System

Identify specific radionuclides at complex sites

The ERG IsoMap is a position-correlated gamma survey system that integrates a large 4-liter sodium iodide [NaI(Th)] detector with a multichannel analyzer, allowing users to collect data on specific radionuclides of interest. The large detector (approximately 40 times the volume of a standard 2-inch × 2-inch NaI detector) enables rapid data acquisition, making it well-suited for mobile MCA survey applications. Like all ERG systems, IsoMap software provides a real-time radiological display of collected data and includes the tools necessary for users to process and analyze their results.


The IsoMap is perfect for UTV radiation surveys targeting specific radionuclides. Sub-meter GPS accuracy and real-time display for all regions of interest allows users to quickly make decisions in the field.

Users can set multiple regions of interest (ROIs) around the energy peaks of the radionuclides of interest. The Isomap software will collect and record total count data as well as count data for each ROI.

Built in peak stabilization ensures there is no data drift when using the IsoMap over long periods of time or in-field conditions where temperatures fluctuate.


Powerful Software

Our software provides a real-time display of the value and location of all data. Legends can be customized for each ROI allowing users to compare radionuclide distributions in the field.

The IsoMap software includes a live 30-second averaged spectra of the data, which allows the user to view changes in the spectra in real-time.


Powered directly from UTV or standalone battery

Sub-meter GPS accuracy

Supports all major coordinate systems