Seismograph Mass-Centered Feedback Controller from Japan
Active feedback controller maintaining sensor mass centering in force-feedback seismographs for stable long-period recording. HTS 9015.90.0150 as specialized geophysical part. Critical for observatory-grade installations.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Technical drawings showing integration with force-feedback mechanism required
• Prove principal use via seismograph service manuals