The Guardian CM268-Split portal monitors radiation levels in parcels, luggage, and other materials, such as scrap metal, as these items move along a conveyor. It incorporates state-of-the-art passive split monitoring technology that precisely locates a source without disrupting the flow of the remaining items on the conveyor, thereby maximizing throughput.


  • Gamma detection

  • No nuisance alarms for continuous flow of parcels, luggage, or scrap metals

  • Precise source location, accurately identifying the source material on a moving conveyor

  • Image and video captured during alarms

  • Fully digital system

Physical Specifications

  • Operating Configuration: Conveyor/consteel
  • Panels: Overhead, left, right, or underneath
  • Number of Gamma Detectors: 2 detectors; 1 per panel
  • Gamma Detector Material: Polyvinyltoluene (PVT) plastic scintillator
  • Panel Enclosure External Dimensions: 82 in L x 75 in W x 24 in D (208 cm L x 190 cm W x 61 cm D)
  • Panel Weight: 65 lbs (30 kg)

Performance Specifications

  • Gamma False Alarm Rate: Less than 1 in 1,000,000 passages


  • Inspection Speed: 7 ft/s (2.2 m/s)
  • Ports: Ethernet, RS485

Environment / Safety

  • Temperature: -4 °F to 122 °F (-20 °C to 50 °C)
  • Humidity: 5 to 95% non-condensing
  • Environmental Protection: IP67