Photomultiplier Tube PMT from Mexico
Photomultiplier tubes (PMTs) use photocathodes to detect low-level light via electron multiplication for scintillation counters and spectroscopy. Falls under HTS 8540.20.4000 as 'other photocathode tubes.' Essential for particle physics and medical imaging detectors.
Duty Rate — Mexico → United States
13.3%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Specify quantum efficiency and gain factors in entry docs; often requires end-user certificates for radiation detection uses
• Avoid bulk import misclassification as semiconductor devices