| 9030.40 | | Other instruments and apparatus |
| 9030.82 | | For measuring or checking semiconductor wafers or devices |
| 9030.82 | 010 | - Character measuring testers |
| 9030.89 | 091 | - Spectrum analyzers |
| 9030.90 | 000 | Parts and accessories |
| 90.31 | | Measuring or checking instruments, appliances and machines, not specified or included elsewhere in this Chapter; profile projectors |
| 9031.10 | 000 | Machines for balancing mechanical parts |
| 9031.20 | 000 | Test benches |
| 9031.20 | | Other optical instruments and appliances |
| 9031.41 | 000 | For inspecting semiconductor wafers or devices or for inspecting photomasks or reticles used in manufacturing semiconductor devices |
| 9031.80 | | Other instruments, appliances and machines |
| 9031.80 | 011 | -- Automatic measuring instruments |
| 9031.80 | 013 | -- Vibration measuring and testing apparatus |
| 9031.90 | | Parts and accessories |
| 9031.90 | 010 | - Of electrical instruments and apparatus |
| 90.32 | | Automatic regulating or controlling instruments and apparatus |
| 9032.10 | | Thermostats |
| 9032.20 | 000 | Manostats |
| 9032.20 | | Other instruments and apparatus |
| 9032.90 | 000 | Parts and accessories |
| 9033.00 | 000 | Parts and accessories (not specified or included elsewhere in this Chapter) for machines, appliances, instruments or apparatus of Chapter 90 |
| 91.01 | | Wrist-watches, pocket-watches and other watches, including stop-watches, with case of precious metal or of metal clad with precious metal |
| 91.01 | | Wrist-watches, electrically operated, whether or not incorporating a stop-watch facility |