S-20 Photocathode Spectral Response Tube
An S-20 spectral response photocathode tube optimized for extended red and UV-visible light detection, commonly used in photomultipliers and image converters for analytical instruments. It is classified under tariff item 8540.20.00 as a photo-cathode tube because the S-20 photocathode determines its spectral sensitivity, and it is used in applications like spectroscopy and low-light detection.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the device is a semiconductor-based photodetector with similar spectral response
Semiconductor-based photosensitive devices are classified under heading 85.41.
If imported as a component of a spectroscopy instrument
Parts of instruments for physical or chemical analysis are classified in Chapter 90.
If the tube is not specifically a camera tube, image converter, or intensifier
Other photo-cathode tubes not elsewhere specified fall under the residual subheading.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Specify the S-20 photocathode type and spectral response range on the commercial invoice to support classification under 8540.20.00
• If the tube is part of a larger analytical instrument, consider classifying the complete instrument under Chapter 90
• Verify whether the tube is subject to end-use certificates for scientific research purposes to claim reduced duty rates
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