Gas Sensor Semiconductor Chip from China
A metal-oxide-semiconductor (MOS) gas transducer detecting reducing gases via conductivity changes. HTS 8541.51.00.00 covers these semiconductor-based chemical transducers for air quality monitors and industrial safety. Surface reaction alters carrier concentration for detection.
Duty Rate — China → United States
50%
Rate breakdown
9903.91.0550%Effective with respect to entries on or after January 1, 2025, articles the product of China, as provided for in subdivision (f) of U.S. note 31 to this subchapter
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Provide gas cross-sensitivity matrices and operating temperature ranges in support docs
• Hazardous material declarations needed for tin/oxide semiconductor materials
• Cal gas certification ensures compliance with environmental sensor standards