Vacuum Photodiode Tube from Germany
S-4 response vacuum photodiode tube with Cs-O-Ag photocathode for UV light detection in spectrophotometers, featuring fast response time (<2ns) and high radiant sensitivity. Operates without electron multiplication for direct photocurrent generation. HTS 8540.89.00.60 covers this as a light-sensing vacuum tube with photocathode.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Specify spectral response curve (160-650nm) to distinguish from semiconductor photodiodes
• Base material certificates required if containing controlled substances like cesium compounds
• Avoid packaging with optical mounts that could trigger instrument parts classification