Photocathode Image Converter Tube from Mexico
A photocathode image converter tube that transforms infrared or ultraviolet photons into visible light by using a photocathode to emit electrons, which are then accelerated and converted to a visible image on a phosphor screen. It falls under tariff item 8540.20.00 because it is explicitly an image converter, a type of photo-cathode tube, used for spectrum conversion in scientific and military applications.
Duty Rate — Mexico → Canada
Import Tips
• Classify the tube as an image converter under 8540.20.00 and provide a datasheet confirming the photocathode material and spectral response
• If the tube is part of a larger optical instrument, check if it should be classified with the instrument under Chapter 90
• Keep records of the end-use to support duty rate claims under tariff preference programs