Photomultiplier Cathode-Ray Tube from Mexico
Photomultiplier CRTs are photocathode tubes functioning as television camera tubes in low-light scientific and military imaging systems. They amplify photon signals via electron multiplication. HTS 8540.20.20 includes these as image intensifiers and other photocathode tubes for cameras.
Duty Rate — Mexico → United States
16%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Obtain end-user statements specifying imaging vs scintillation counter use
• Test for radiation tolerance if high-energy physics applications suspected
• Include gain specifications (10^4-10^7) to confirm photocathode multiplication function