Gas Chromatograph Optical Window from Japan
Sapphire windows for flame ionization detectors (FID) in GC systems (9027.90 optical components), transmitting UV for ionization efficiency. Withstands 400°C combustion temperatures. Parts of optical chromatographic instruments.
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%
Import Tips
• Certify sapphire thermal shock resistance and UV transmission >90% at 200nm
• Document exact FID detector model compatibility and mounting specifications
• Include gas-tight seal test results for pressurized detector environments