Helium-3 Neutron Detector Fill Gas from Japan
High-purity Helium-3 gas filled into detector tubes for thermal neutron detection in security and research. Classified as the isotope itself under HTS 2845.40.00.00, not as a finished detector. The isotope's neutron absorption properties drive its specialized use.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Secure BIS export licenses if destined for sensitive end-uses; include neutron cross-section specs in docs; avoid packaging that implies finished detector assembly