Solar Blind Phototube from China
CsTe solar blind phototube with response peak at 220nm and sharp cutoff at 320nm for ozone monitoring and flame detection. Vacuum tube construction eliminates solar interference in UV spectroscopy. Classified under HTS 8540.89.00.60 as specialized light-sensing tube for UV spectrum.
Duty Rate — China → United States
41.2%
Rate breakdown
9903.88.0125%Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• UV transmission window specifications distinguish from visible response tubes
• NIOSH certification may be required for industrial hygiene monitoring applications
• Declare cathode activation process to verify solar blind spectral cutoff