Guardian™ Lab Systems are trusted worldwide to detect and locate sources, incorporating state-of-the-art passive scanning technology to detect changes in gamma radiation levels. The Guardian Lab System was initially designed to detect radionuclides in material sample coupons as part of the quality control process for the production of steel and aluminum. Trusted in the metals industry for over 15 years, the Guardian Lab System is now used to test food and water samples for radionuclides and to perform NORM analysis for geological samples.


  • High-efficiency counting and radionuclide identification with large 3x3 NaI (Tl) detector

  • Easy to use and customizable, with automated features to streamline operation

  • Quick processing of samples for disposition of materials

  • Ultra-low background for detection limits of ≤1.0 Bq/g in 60 seconds or less

Performance Specifications

  • Operating Configuration: Laboratory Gamma Spectroscopy
  • Number of Gamma Detectors: 1 detector
  • Gamma Detector Material: NaI (Tl) sodium iodide
  • Lead Shield and Stand External Dimensions: 45 in H x 15 in W x 15 in D (114 cm H x 38 cm W x 38 cm D)
  • System Weight: 635 lbs (288 kg)

Performance Specifications

  • Gamma: IAEA TECDOC-855


  • Inspection Mode: Lead shielded, low background
  • Ports: Ethernet

Environment / Safety

  • Temperature: -4 °F to 122 °F (-20 °C to 50 °C )
  • Humidity: 5 to 95% non-condensing
  • Environmental Protection: IP64