Secondary Emission Multiplier Tube from Canada
These photocathode tubes amplify electron signals through secondary emission for high-gain television camera applications. They are 'other' cathode-ray tubes under HTS 8540.20.20.80, designed specifically for image converter/intensifier roles.
Duty Rate — Canada → United States
16%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Gain amplification specs (>1000x) critical to avoid photocell classification in 8531
• Military dual-use potential requires end-user certificates even for civilian imports
• Vacuum bake-out certificates prevent 'spent' classification under 8549 definitions