Photomultiplier Tube (PMT)
Photomultiplier tubes convert weak light signals into electrical pulses through electron multiplication across multiple dynodes. Classified under HTS 8540.89.00 as photocathode tubes designed for photon detection in scientific instruments.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If spectrometer instruments
Instrument-specific PMTs classified with complete analytical instruments.
If laser detection systems
Laser-related PMTs under optical instruments rather than general tubes.
If solid-state photodetector replacement
Photodiode arrays classified as semiconductor optoelectronic devices.
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Import Tips & Compliance
• Spectral response curves and quantum efficiency data essential for classification
• Clean room packaging required; contamination voids warranty and functionality
• Distinguish from image intensifier tubes under 8540.71 (TV camera tubes)
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