Ionization Chamber Airflow Window Assembly from China
Insect-screened airflow aperture for ionization smoke detector sensing chambers. Specific HTS 9022.90.70.00 part enabling smoke particle entry to radiation field. 10-micron filtration prevents false alarms.
Duty Rate — China → United States
13.5%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
Import Tips
• Test airflow resistance per UL 268 Method 2
• Specify 'smoke sensing exclusive' design function
• Include humidity exposure test results (85% RH)