Ionization Smoke Detector Sound Chamber Assembly from China
Acoustic chamber optimized for 85dB alarm tone in ionization-type detectors. Classified HTS 9022.90.70.00 as integral part amplifying radiation detection alerts. Frequency-matched to human hearing response curve.
Duty Rate — China → United States
13.5%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Certify to UL 464 fire alarm appliance standards
• Measure SPL at 10ft per ANSI S1.2 for documentation
• Specify ionization model compatibility exclusively