Geiger-Mueller Counter Tube from Canada
Geiger-Mueller tubes detect ionizing radiation through gas ionization avalanche in a cylindrical gas volume. Essential for radiation monitoring, they classify as gas electron tubes under HTS 8540.89.0020.
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
• Specify fill gas (helium/neon mix typical) and operating voltage plateau
• NRC import license may be required for radiation detection equipment
• Dead time and efficiency specs help establish detector function