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RadGraph & RadMeter Suite

Software for Magnii Geiger Counters


RadGraph and RadMeter are software programs that take readings from the USB-RAD121 geiger counter.

RadGraph is a comprehensive program that allows graphing readings over time, saving graphs as images and CSV data, printing graphs, analyzing radiation levels over time and also taking simple measurements.

RadMeter is a simple program that just displays live readings from your geiger counter.

RadGraph Screenshot:

RadGraph Screenshot

Graph exported from RadGraph:

RadGraph Log



  • Works With: USB-RAD121
  • Operating System: Windows 98, ME, XP, Vista, 7, 8
  • Recommended Screen Resolution: 1024 x 768 Minimum

RadGraph Features:

  • Unit of Measurement: mR/hr, μR/hr, μSv/hr, CPM (compensated or uncompensated)
  • Graphing over time
  • Exporting graphs as images (BMP or JPEG)
  • Exporting graphs as data - comma separated values (CSV) format
  • Printing graphs
  • Copy graphs and data directly to the clipboard
  • Opening saved graph data files
  • Selectable Counting Period
  • Configurable Alarm Threshold with beep and alert message
  • Displays Max & Average readings on the graph
  • Customizable graph title and notes section


RadGraph Latest Version:
RadMeter Latest Version:

Download RadGraph & RadMeter (EXE Installer)