Proportional Counter Gas Tube from Japan
Proportional counters use gas multiplication for precise radiation spectroscopy in nuclear physics. The gas amplification region creates proportional charge pulses, fitting HTS 8540.89.0020 as gas electron tubes.
Duty Rate — Japan → United States
13.7%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Window material (mica typical) and gas gain specs required for declaration
• Nuclear regulatory documentation often needed for physics research imports
• Distinguish from sealed detectors by providing operating principle docs