Harmonized System
U.S. exports of physical & chemical analysis instruments — other (viscosity, porosity, nmr, electrochemical, etc.) (HS 902789) totaled $210.5M in August 2026.
Importers of Physical & Chemical Analysis Instruments — Other (Viscosity, Porosity, NMR, Electrochemical, etc.) paid $7.7M in duties in August 2026, an effective tariff rate of 5.01% of the $154.5M imported — duty actually collected as a share of that value, not the published tariff schedule. Physical & Chemical Analysis Instruments — Other (Viscosity, Porosity, NMR, Electrochemical, etc.) imports of $154.5M in August 2026 ran 14% above the year-to-date monthly average of $135.6M.
Last updated: August 2026 dataNuclear magnetic resonance instruments (9027892500), electrochemical analyzers (9027893100), and a wide array of instruments measuring viscosity, porosity, surface tension, and thermal or acoustic properties are consolidated in this residual analytical-instrument heading. Malaysia leads US import supply — a notable feature driven by the presence of major semiconductor and life-science instrument manufacturing operations there — followed by Germany, China, and Switzerland. The heading's breadth and the high unit values of NMR systems and electrochemical workstations make correct 10-digit classification critical, as several lines carry different Section 301 exposure depending on origin.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
3.4K shipments/mo
A benchtop NMR used for chemical analysis or quality control classifies under 9027.89 (specifically 9027892500), not heading 9018. Heading 9018 is reserved for instruments used in medical, surgical, dental, or veterinary practice. An NMR marketed and used exclusively for clinical diagnostic imaging (MRI) would fall under 9018, but laboratory and industrial NMR spectrometers belong in Chapter 90 under 9027.89.
To support classification under 9027893100 (electrochemical instruments), importers should provide manufacturer specifications confirming the instrument operates by measuring electrical properties of a chemical system — such as potentiostats, galvanostats, pH meters with analytical output, or conductivity analyzers. Instruments that measure physical properties (viscosity, surface tension) without an electrochemical operating principle belong in the physical analysis lines. A technical datasheet and, for high-value entries, a binding ruling are the recommended documentation strategy.
HSChapter 90
Trade Directory
List your company under HS 902789 — Physical & Chemical Analysis Instruments — Other (Viscosity, Porosity, NMR, Electrochemical, etc.), so the companies trading it can find you. Be the first supplier listed.
Subheading 2 of 7 in heading 9027
Subheading 902789 · $210.5M of $888.3M
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 |
|---|---|---|---|---|---|
| 9027894530 | Elec Chemical Analysis Inst,Exc Use Opt Radiations | $100.7M | 1.78% | 15.35% | $1.8M |
| 9027898090 | Oth Inst, Measuring/Checking Viscosity Etc,NESOI | $21.1M | 11.96% | 88.61% | $2.5M |
| 9027894590 | Oth Elec Inst,Measuring/Checking Viscosity, Etc | $13.1M | 10.40% | 93.17% | $1.4M |
| 9027894560 | Elec Physical Analysis Inst,Exc Use Opt Radiations | $8.9M | 10.00% | 86.57% | $888K |
| 9027892500 | Nuclear Magnetic Resonance Inst Exc Heading 9018 | $4.3M | 11.91% | 99.95% | $515K |
| 9027898060 | Other Physical Analysis Instruments, NESOI | $3.2M | 10.29% | 96.30% | $334K |
| 9027898030 | Other Chemical Analysis Instruments, NESOI | $3.2M | 10.37% | 85.60% | $331K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
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
$154.5MYoY · free account
Exports
$210.5MYoY · free account
12-mo low · imports
YoY · free accountOver the twelve months to August 2026, the U.S. imported $1.7B of Physical & Chemical Analysis Instruments — Other (Viscosity, Porosity, NMR, Electrochemical, etc.).
Through August 2026. Source: U.S. Census Bureau.
Exports · August 2026
destination
customs district
origin
entry
rate provision · imports
58.4% enters free of duty; duty collected equals 5.01% of total import value.