Cold Cathode Ion Gauge Tube
A cold cathode vacuum tube that measures pressure by ionizing gas with electron discharge between electrodes. Classified in HTS 8540.89.00.80 as other cold cathode tubes used in ultra-high vacuum systems for scientific and industrial applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as complete vacuum gauge
Assembled with electronics and housing, it becomes a finished measuring instrument under 9026.
If for semiconductor manufacturing valves
Cold cathode tubes integral to vacuum valves shift to Chapter 84 machinery parts.
If electrical machinery parts
Other electrical apparatus parts if not specifically identifiable as tubes.
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Import Tips & Compliance
• Document pressure measurement range and cold cathode construction to distinguish from hot cathode gauges
• Provide material safety data for any hazardous gases used in calibration
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