Channeltron Electron Multiplier Tube from China
Burle Channeltron C-30810 continuous channel electron multiplier tube for mass spectrometry, providing gain >10^8 with 100ps FWHM timing resolution. Features curved channel geometry for high count rates up to 10^7 cps. Classified under HTS 8540.89.00.60 as light-sensing tube technology adapted for charged particle detection.
Duty Rate — China → United States
41.2%
Rate breakdown
9903.88.0125%Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Document particle detection application vs pure light-sensing to justify tube classification
• High voltage operation specs (>2kV) distinguish from semiconductor multipliers
• Cleanroom packaging certification required for contamination-sensitive applications