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8540.20.40.00/S-20 Photocathode Spectral Response Tube/Japan

S-20 Photocathode Spectral Response Tube from Japan

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.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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Import Tips

• Quantum efficiency curves by wavelength required for customs; common in flow cytometry imports

• Avoid 9027 instrument classification