Ionization Chamber Module for Smoke Detectors from China
This is the core detection component in ionization-type smoke detectors that uses a small amount of radioactive material to ionize air between two electrodes, detecting smoke particles by changes in current flow. It falls under HTS 9022.90.70.00 as a part specifically for ionization smoke detectors, which rely on ionizing radiation for operation. These modules are precision-engineered for residential and commercial fire safety systems.
Duty Rate — China → United States
13.5%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Verify NRC licensing for radioactive components and include exemption certificates in documentation
• Label shipments clearly as 'radioactive material' per DOT/IATA hazardous goods rules to avoid delays
• Confirm compatibility with US detector standards (UL 268) to prevent CBP reclassification