Other
Thermionic, cold cathode or photocathode tubes (for example, vacuum or vapor or gas filled tubes, mercury arc rectifying tubes, cathode-ray tubes, television camera tubes); parts thereof: > Television camera tubes; image converters and intensifiers; other photocathode tubes: > Other
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 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(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 8540.20.40.00
Plumbicon Television Camera Tube
The Plumbicon is a specialized television camera tube using a lead oxide photoconductive target for high-quality broadcast video imaging. It falls under HTS 8540.20.4000 as a television camera tube, distinct from modern digital sensors, featuring photocathode technology for electron conversion. Primarily used in professional studio cameras before CCD dominance.
Image Intensifier Photocathode Tube
Image intensifier tubes convert low-light photons via photocathode to amplified electrons, creating visible images for night operations. Classified under HTS 8540.20.4000 as 'image intensifiers; other photocathode tubes' per hierarchy. Used in military night vision devices and scientific low-light imaging.
Vidicon Camera Tube
Vidicon tubes employ photoconductive targets activated by photocathodes for analog television camera applications in legacy broadcast and industrial video. HTS 8540.20.4000 covers these as 'other' television camera tubes. Common in vintage studio equipment and space-rated cameras.
Photomultiplier Tube PMT
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.
High-Speed Streak Camera Tube
Streak camera tubes capture ultra-fast events using photocathodes with time resolution under 50 nanoseconds for ballistics testing. HTS 8540.20.4000 applies to these specialized television camera tubes not meeting digital subheading specs. Used in research and defense applications.
Microchannel Plate Image Intensifier
Microchannel plate (MCP) intensifiers amplify photocathode-emitted electrons through millions of channels for superior night/low-light imaging. Classified HTS 8540.20.4000 as image intensifiers/photocathode tubes. Key component in advanced night vision and astronomy.
Photocathode Image Converter Tube
Image converter tubes directly transform IR/UV photons via photocathodes to visible spectrum electrons for spectrum conversion. HTS 8540.20.4000 explicitly includes image converters as other photocathode tubes. Applied in scientific spectroscopy and covert surveillance.
Radiation-Hardened Camera Tube
Radiation-hardened photocathode tubes withstand >50k Gy without degradation for space/satellite television cameras. While related to 8525.82, standalone tubes classify under HTS 8540.20.4000 as other television camera tubes. Critical for aerospace imaging.
S-20 Photocathode Spectral Response Tube
S-20 spectral response photocathode tubes optimize UV-visible detection for photomultipliers and image converters. HTS 8540.20.4000 covers these extended red response photocathode tubes. Standard in analytical instrumentation.
Gen 2 Image Intensifier Tube
Second-generation image intensifier tubes use GaAs photocathodes with microchannel plates for 40k+ gain in military night vision. HTS 8540.20.4000 as image intensifiers/photocathode tubes before assembly. Intermediate tech between Gen1 and Gen3.