A Series

Handheld Radioisotope Identification Device (RIID)

The H3D® A400 is the new standard in radioisotope identification devices, combining excellent energy resolution with directionality without the need for cryogenic cooling. Search, identify, and localize all with one detector.

A400 Survey of Valves


  • Compact, rugged, and portable
  • Designed to exceed ANSI N42.34
  • Real-time 360° isotope-specific directionality
  • Identification times comparable to 2" NaI(Tl)
  • Near-HPGe energy resolution at room temperature


  • Border security
  • First responders
  • Defense and homeland security
  • Environmental radiation measurements
  • Industrial characterization

A400 Survey of Car
A400 Survey of Drum

Legacy A Series

Follow this link to access information about a former version of the A Series.

More Information

Contact us for more information, a demo, or quotation.

A400 and related systems are patent protected by: U.S. Pat No. 7,411,197 and U.S. Pat No. 7,692,155 under license from the University of Michigan, and U.S. Pat No. 10,032,264.

This website uses cookies to ensure you get the best experience. Learn More