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HSChapter 90
U.S. imports of mass spectrometers (HS 902781) totaled $32.5M in April 2026, traded with 29 countries.
Importers of Mass Spectrometers paid $2.2M in duties in April 2026 — an effective duty rate of 7.1% on $31.3M in dutiable value, based on actual customs collections rather than the published tariff schedule. Mass Spectrometers imports of $32.5M in April 2026 ran 15% above the year-to-date monthly average of $28.2M.
Last updated: April 2026 dataMass spectrometers — instruments that ionize chemical species and sort them by mass-to-charge ratio — are among the highest-value analytical instruments in international trade, serving pharmaceutical, environmental, forensic, and semiconductor applications. Under the US schedule, all imports in this heading enter as electrical mass spectrometers (9027810000), reflecting the fact that no commercially significant non-electrical mass spectrometer exists. Germany is the leading US import source, followed by Singapore and the United Kingdom — a geographic concentration that reflects the global dominance of a small number of precision-instrument manufacturers headquartered in those countries. Combination instruments such as LC-MS or GC-MS systems may require a classification determination as to whether the mass spectrometer or the separation component governs.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
An ICP-MS is classified under heading 9027.81 as a mass spectrometer, because the mass spectrometer component — which separates and detects ions by mass-to-charge ratio — is the defining analytical function. The ICP source is the sample introduction and ionization method, not a separate instrument. This classification is consistent with CBP rulings on hyphenated ICP-MS systems.
Germany, Singapore, and the United Kingdom collectively account for the dominant share of US mass spectrometer imports, and the market is further concentrated among a handful of global manufacturers. This means supply disruptions — whether from logistics, export controls, or geopolitical factors — can have outsized impact on laboratory procurement timelines. Buyers in regulated industries (pharma, environmental testing) should factor lead times and service-network geography into sourcing decisions.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| GERMANY | $16.9M | $10.3M | -$6.6M |
| SINGAPORE | $7.4M | $4.7M | -$2.7M |
| JAPAN | $3.6M | $2.7M | -$829K |
| CHINA | -- | $5.6M | +$5.6M |
| NETHERLANDS | -- | $3.8M | +$3.8M |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 9027810000 | ELECTRICAL MASS SPECTROMETERS | $32.5M | 7.08% | $2.2M |
ELECTRICAL MASS SPECTROMETERS
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 9027810000 | ELECTRICAL MASS SPECTROMETERS | $41.4M |
ELECTRICAL MASS SPECTROMETERS
6.7K 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 |
|---|---|---|---|
| Texas | $12.2M | $1.3M | -$10.9M |
| Delaware | $554K | $12.0M | +$11.5M |
| California | $1.9M | $8.5M | +$6.5M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NEW ORLEANS, LA | $218K | $15.3M | +$15.1M |
| DALLAS-FORT WORTH, TX | $11.9M | $460K | -$11.4M |
| CHICAGO, IL | $2.8M | $5.0M | +$2.2M |