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HSChapter 90
U.S. imports of other optical measuring & checking instruments and machines (nesoi) (HS 903149) totaled $126.0M in April 2026, traded with 49 countries.
Importers of Other Optical Measuring & Checking Instruments and Machines (NESOI) paid $11.5M in duties in April 2026 — an effective duty rate of 11% on $102.0M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataProfile projectors, coordinate-measuring machines with optical sensing, and a broad residual category of optical checking appliances all land here when they fall outside the semiconductor-specific heading. The five 10-digit lines span profile projectors (9031491000), optical coordinate-measuring machines (9031494000), mask inspection instruments excluding photomasks (9031497000), and two NESOI catch-all lines (9031498000 and 9031499000) that capture specialty metrology tools used in aerospace, automotive, and precision manufacturing. Japan and Germany dominate US supply, consistent with their leadership in precision optical engineering. Goods from Canada and Mexico may benefit from USMCA preferential treatment where rules-of-origin requirements are met.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
A profile projector magnifies and projects a silhouette of a workpiece onto a screen for manual or semi-automatic comparison against a template — it does not inherently compute three-dimensional coordinates. An optical coordinate-measuring machine uses optical sensing to determine precise X-Y-Z coordinates of a part's surface features and outputs dimensional data digitally. The distinction matters because the two lines carry different statistical reporting requirements and may have different duty treatment.
A laser flatness or surface-profile checker that is optical in nature but not dedicated to semiconductor wafer, photomask, or reticle inspection would typically fall under the NESOI lines 9031498000 or 9031499000, depending on its specific configuration. If it incorporates coordinate-measuring functionality, 9031494000 may apply instead. A binding ruling from CBP is the most reliable path when the instrument straddles multiple descriptions.
Monthly import values over time
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HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 9031499000 | OTHER OPTICAL INSTRUMENTS AND APPLIANCES,NESOI | $113.8M | 11.38% | $10.3M |
| 9031494000 | COORDINATE-MEASURING MACH FOR OPTICAL INST & APPL | $10.9M | 10.54% | $1.1M |
| 9031491000 | PROFILE PROJECTORS | $900K | 10.36% | $90K |
| 9031497000 | OPTICAL INSTR FOR INSPECTING MASKS(EX PHOTOMASKS) | $483K | 10.00% | $39K |
OTHER OPTICAL INSTRUMENTS AND APPLIANCES,NESOI
COORDINATE-MEASURING MACH FOR OPTICAL INST & APPL
PROFILE PROJECTORS
OPTICAL INSTR FOR INSPECTING MASKS(EX PHOTOMASKS)
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 9031498000 | OPTICAL INSTRUMENTS AND APPLIANCES NESOI | $63.3M |
| 9031494000 | COORDINATE-MEASURING MACH FOR OPTICAL INST & APPL | $7.8M |
| 9031491000 | PROFILE PROJECTORS | $2.1M |
OPTICAL INSTRUMENTS AND APPLIANCES NESOI
84.8K no
COORDINATE-MEASURING MACH FOR OPTICAL INST & APPL
1.1K no
PROFILE PROJECTORS
536 no
INSTR & APPL F MEDICAL SURGICAL DENTAL VET, NESOI
HS 901890
MED NEEDLES. NESOI, CATHERERS ETC AND PARTS ETC
HS 901839
ARTIFICIAL JOINTS & PARTS & ACCESSORIES THEROF,NES
HS 902139
ELECTRO-DIAGNOSTIC APPARATUS NESOI, AND PARTS ETC.
HS 901819
OZONE,OXYGEN,ETC THERAPY, RESPIRATION APPARATUS,PT
HS 901920
MEAS CHECKNG INSTRUMENT & MACH, NOT OPTICAL, NESOI
HS 903180
| State | Imports | Exports | Balance |
|---|---|---|---|
| Illinois | $27.7M | $2.0M | -$25.7M |
| California | $12.4M | $16.7M | +$4.3M |
| Minnesota | $9.4M | $4.6M | -$4.8M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| CHICAGO, IL | $28.7M | $8.2M | -$20.5M |
| NEW ORLEANS, LA | $11.0M | $5.9M | -$5.1M |
| LAREDO, TX | $10.4M | $2.7M | -$7.7M |