Neutron BackScatter Moisture Detection




A radioactive source emits high-energy neutrons into the insulation. If there’s moisture in the insulation, the hydrogen nuclei attenuate the energy of the emitted neutrons. The inspection instrument’s gauge detector displays a low-energy neutrons count proportional to the amount of water in the insulation. High counts per time period indicate more moisture and a higher probability of the present of CUI.

Advantages of Neutron BackScatter:

  • Relatively quick and accurate method to identify areas for potential CUI
  • Access elevated areas without scaffolding Light, versatile to reach congested areas
  • Liquid level determination





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