1BV7 Photomultiplier Tube Diode from Canada
The 1BV7 is a vacuum tube diode-triode used in photomultiplier applications for detecting low levels of light in scientific instruments. It features a photocathode and multiplier stages within a thermionic tube structure, classified under HTS 8540.89.00.40 as a diode-triode photocathode tube. This tube operates by converting photons to electrons via the photocathode for amplification.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Verify tube specifications match subheading notes for photocathode tubes to avoid reclassification to semiconductor diodes (8541)
• Include detailed datasheets showing vacuum tube construction and filament operation in import documentation
• Check for radiation-tolerant variants which may require additional certification under related subheadings