| 9031.80 | | Other instruments, appliances and machines: | | | | |
| 9031.90.45 | 00 | Of other optical instruments and appliances, other than test benches: | | | | |
| 9031.90.54 | 00 | Of optical instruments and appliances of subheading 9031.41 or 9031.49.70 | X | Free | | 50% |
| 9032 | | Automatic regulating or controlling instruments and apparatus; parts and accessories thereof: | | | | |
| 9032.81.00 | | Other instruments and apparatus: | | | | |
| 9032.81.00 | 20 | Industrial process control instruments and apparatus: | | | | |
| 9032.89.60 | 15 | Control instruments for air conditioning, refrigeration or heating systems: | | | | |
| 9032.89.60 | 30 | Process control instruments and apparatus: | | | | |
| 9032.89.60 | 40 | Temperature control instruments | No. | | | |
| 9032.89.60 | 50 | Pressure and draft control instruments | No. | | | |
| 9032.89.60 | 60 | Flow and liquid level control instruments | No. | | | |
| 9032.89.60 | 70 | Humidity control instruments | No. | | | |
| 9032.90.60 | 60 | Of instruments and apparatus of subheading 9032.81 | X | | | |
| 9033.00.00 | 00 | Parts and accessories (not specified or included elsewhere in this chapter) for machines, appliances, instruments or apparatus of chapter 90 | X | 4.4% | Free (A,AU,B,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 40% |
| 9103 | | Clocks with watch movements, excluding clocks of heading 9104: | | | | |
| 9104.00.05 | | With clock movements measuring over 50 mm in width or diameter: | | | | |
| 9105.99.10 | 00 | Standard marine chronometers having spring-detent escapements | No. Jwls. | 17￠/each + 2.5% + 1￠/jewel | Free (A,AU,BH,CA, CL,E,IL,J,JO, MA,MX,P, SG) | $4.50 each + 65% + 25￠/jewel |
| 9106.90.55 | | Apparatus for measuring, recording, or otherwise indicating intervals of time, with clock or watch movements, battery powered: | | | | |
| 9106.90.75 | 00 | Apparatus for measuring, recording or otherwise indicating intervals of time, with clock or watch movements, AC powered and with opto-electronic display only | No. | 3.9% | Free (A+,AU,BH, CA,CL,D,E,IL,J, JO,MA,MX, P,SG) | $4.50 each + 65% |
| 9108 | | Watch movements, complete and assembled: | | | | |
| 9109 | | Clock movements, complete and assembled: | | | | |
| 9109.11.10 | 20 | Other clock movements: | | | | |
| 9109.11.20 | 20 | Other clock movements: | | | | |
| 9109.11.40 | 20 | Other clock movements: | | | | |
| 9109.11.60 | 20 | Other clock movements: | | | | |
