Solar Blind Phototube
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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If spectrometer component
UV phototubes in spectrophotometers classify as instrument parts.
If flame safety interlock function
Phototubes in burner management systems classify under electrical sound/vision signaling.
If silicon carbide photodiode equivalent
Modern UV detectors use semiconductor materials under photosensitive semiconductor heading.
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Import Tips & Compliance
• 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
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