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%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
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