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HSChapter 90
U.S. imports of non-optical microscopes & diffraction apparatus (HS 901210) totaled $23.7M in July 2026, traded with 20 countries.
Importers of Non-Optical Microscopes & Diffraction Apparatus paid $1.6M in duties in July 2026 — an effective duty rate of 8.3% on $19.7M in dutiable value, based on actual customs collections rather than the published tariff schedule. Non-Optical Microscopes & Diffraction Apparatus imports of $23.7M in July 2026 ran 34% above the year-to-date monthly average of $17.7M.
Last updated: July 2026 dataElectron microscopes, ion microscopes, scanning probe microscopes, and X-ray diffraction apparatus — instruments that form images or analyze structure without relying on visible light — are classified together under a single 10-digit line (9012100000). Czech Republic leads US import supply, followed by Japan and Germany, a distribution that reflects the global footprint of major electron microscopy manufacturers. These instruments are critical capital equipment for semiconductor fabrication, nanotechnology research, and advanced materials characterization, and individual units frequently carry very high declared values. Because no subdivision exists within the US tariff line, classification disputes in this heading typically center on whether an instrument qualifies as a microscope or diffraction apparatus versus a related analytical instrument in another Chapter 90 heading.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
84 shipments/mo
The distinction often turns on whether the instrument's primary function is to produce a magnified image of a specimen (microscope) versus to measure or analyze physical or chemical properties (analytical instrument). For example, a scanning electron microscope used primarily for imaging classifies under 9012.10, while an energy-dispersive X-ray spectrometer used primarily for elemental analysis may fall under a different heading. When an instrument performs both functions, the principal use and design intent guide classification.
The Czech Republic hosts major manufacturing operations for leading global electron microscopy companies, particularly in the Brno region, which has developed into a recognized center for high-end electron and ion beam instrument production. This geographic concentration of manufacturing explains the country's prominence in US import data for this technically demanding product category.
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Subheading 1 of 2 in heading 9012
Subheading 901210 · $23.7M of $34.0M
Imports · July 2026
origin
Japan and Czech Republic together supply 82% of it.
customs district
destination
entry
rate provision · imports
5.5% enters free of duty; the effective duty rate is 6.93%.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 9012100000 | Microscopes, Exc Optical; Diffraction Apparatus | $23.7M | 6.93% | 83.09% | $1.6M |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 9012100000 | Microscopes, Exc Optical; Diffraction Apparatus | $3.8M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$23.7MYoY · Pro
Exports
$3.8MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.