Non-Intrusive Inspection Systems (NIIS)
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The Non-Intrusive Inspection Systems (NIIS) program consists of commercial off-the-shelf products that utilize nuclear source and X-ray technologies to scan vehicles, cargo and personnel for detection of explosives and other contraband. These systems are employed within a layered force protection system that includes security personnel trained to maintain situational awareness, aided by a range of other products including military working dogs, under-vehicle scanning mirrors and hand-held or desktop trace explosive detectors.

NIIS includes a variety of products with differing characteristics that are added to the Army commander’s tool box. They include mobile, rail-mounted but relocatable, and fixed-site characteristics.


NIIS provides critical force protection measures to safeguard secure areas and protect Soldiers from hidden improvised explosive devices and other contraband not visible to the naked eye.


  • Mobile Vehicle and Cargo Inspection System (MVACIS): Truck-mounted system that uses a nuclear source that can penetrate approximately 6.5 inches of steel
  • Relocatable Vehicle and Cargo Inspection System: Rail-mounted system that uses the same nuclear source as the MVACIS; operates on rails and is employed in static locations or moved within 24 hours to locations where prepared use of rail system eliminates requirement to maintain truck platform
  • Militarized MVACIS: Uses same gamma source as other VACIS products, but it is mounted on a High Mobility Multipurpose Wheeled Vehicle
  • Militarized MVACIS (ZBV): Van-mounted system that uses backscatter X-ray technology; penetrates approximately one-quarter inch of steel and can be employed in static locations where room is limited
  • Backscatter Vehicle Mounted Trailer (BVMT): Mobile inspection system for vehicles and cargo that uses same backscatter X-ray technology as the ZBV; BVMT trailer contains the X-ray source and backscatter detectors while the forward scatter trailer contains forward scatter detectors
  • Personnel Scanners: Use backscatter X-ray technology to nonintrusively scan people for the presence of explosives, weapons or other contraband and are American National Standards Institute compliant; depending on the model, these systems can scan between 140 and 240 people per hour
  • T-10 Trailer: High-energy gantry vehicle and cargo scanner that uses a 1-Megavolt Liner Accelerator that penetrates up to 4 inches of steel while scanning


  • American Science & Engineering, Inc. (Billerica, MA)
  • Rapiscan Systems (Torrance, CA)
  • Science Applications International Corp. (SAIC) (San Diego, CA)