Klystron Gas-Loaded Reflex Tube from Canada
Gas-loaded klystron tubes use controlled gas pressure for microwave power generation in scientific accelerators. The gas affects electron velocity, qualifying as vapor electron tubes under HTS 8540.89.0020.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Vacuum pumpdown specs must show residual operating gas pressure
• Particle accelerator end-use statement may trigger EAR licensing
• RF power output rating critical for classification