The GCS-1500 Series is capable of both gamma and neutron detection and is trusted worldwide to detect and identify radioactive nuclides. The GCS-1500 Series’ modular drive-through design can be configured to support the unique needs of the nuclear industry, law enforcement, private industry, research institutes, and federal agencies tasked with nuclear safety or public security.


  • Exceptional gamma and neutron detection

  • Source localization

  • NORM discrimination to minimize nuisance alarms

  • No void or uneven load distribution alarms

  • Fully digital system design

  • Remote monitoring and service

  • ANSI 42.35 compliant; approved for use in Homeland Security

Physical Specifications

  • Operating Configuration: Drive-through monitor for vehicles, trucks, and containers
  • Pillars: left and right
  • Number of Gamma Detectors: 2 or 4 (standard); up to 12 (configurable)
  • Gamma Detector Material: Polyvinyltoluene (PVT) plastic scintillator
  • Number of Neutron Detectors: 6 or 12 (standard); up to 36 (configurable)
  • Neutron Detector Material: LiZnS-PMMA
  • Pillar External Dimensions: 80 in L x 40 in W x 17 in D (203 cm L x 102 cm W x 43 cm D)
  • Pillar Weight: 800 lbs (360 kg)

Performance Specifications

  • Gamma Radiation Detection: Meets ANSI N42.35 and IEC 62244
  • Special Nuclear Materials (SNM) Detection: Meets ANSI N42.35 and IEC 62244
  • Gamma False Alarm Rate: Less than 1 in 10,000 passages
  • Neutron False Alarm Rate: Less than 1 in 10,000 passages


  • Inspection Speed: 5 mph (8 km/h) nominal
  • Ports: Ethernet, RS485, Serial

Environment / Safety

  • Temperature: -4 °F to 140 °F (-20 °C to 60 °C )
  • Humidity: 5 to 95% non-condensing
  • Environmental Protection: IP65