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Home › Chapter 90 › Heading 9027

HS Heading 9027 : Instruments and apparatus for physical or chemical analysis (for example, polarimeters, refractometers, spectrometers, gas or smoke analysis apparatus); instruments and apparatus for measuring or checking viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring or checking quantities of heat, sound or light (including exposure meters); microtomes; parts and accessories thereof

HEADING DEFINITION & DISAMBIGUATION

HS Heading 9027 encompasses instruments and apparatus for physical or chemical analysis (for example, polarimeters, refractometers, spectrometers, gas or smoke analysis apparatus); instruments and apparatus for measuring or checking viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring or checking quantities of heat, sound or light (including exposure meters); microtomes; parts and accessories thereof. It classifies 7 6-digit WCO subheadings within Chapter 90 under the Harmonized System [USITC HTS 2026].

Chapter
Heading
9027
Subheadings
7 HS6
Status
Verified 2026

Subheadings Under Heading 9027

HS Code WCO 6-Digit Subheading Description Chapter Operational Package
9027.10 Gas or smoke analysis apparatus 90 View 9027.10 Package →
9027.20 Chromatographs and electrophoresis instruments 90 View 9027.20 Package →
9027.30 Spectrometers, spectrophotometers and spectrographs using optical radiations (ultraviolet, visible, infrared) 90 View 9027.30 Package →
9027.50 Other instruments and apparatus using optical radiations (ultraviolet, visible, infrared) 90 View 9027.50 Package →
9027.81 Other instruments and apparatus, Mass spectrometers 90 View 9027.81 Package →
9027.89 Other instruments and apparatus, Other 90 View 9027.89 Package →
9027.90 Microtomes; parts and accessories 90 View 9027.90 Package →
DISAMBIGUATION & CLASSIFICATION GUIDE

How to Select the Correct Subheading Under Heading 9027

Commercial shipments must be declared under the exact 6-digit WCO subheading that matches physical, chemical, or processing characteristics. Review the subheading descriptions above and verify against binding CBP CROSS rulings prior to entry filing.

Official Primary Sources & Authority References

USITC HTS Heading 9027 ↗

United States International Trade Commission official Harmonized Tariff Schedule.

CBP CROSS Rulings ↗

CBP e-Rulings database for Heading 9027 precedent rulings.

WCO Nomenclature ↗

World Customs Organization Harmonized System 2022 nomenclature standard.

U.S. Census Foreign Trade ↗

U.S. Census Bureau HTS-to-NAICS concordance and Schedule B export database.

Heading 9027 Frequently Asked Questions (FAQ)

What commercial articles are grouped under HS Heading 9027?
HS Heading 9027 covers Instruments and apparatus for physical or chemical analysis (for example, polarimeters, refractometers, spectrometers, gas or smoke analysis apparatus); instruments and apparatus for measuring or checking viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring or checking quantities of heat, sound or light (including exposure meters); microtomes; parts and accessories thereof, grouping 7 6-digit WCO subheadings.
How are 6-digit subheadings structured under Heading 9027?
Subheadings under Heading 9027 range from 9027.11 to 9027.90, classifying goods by processing state, origin, or material composition.
What is the representative US import duty rate for Heading 9027?
US MFN general duty rates for Heading 9027 commodities range from Duty-Free up to representative ad valorem percentages under the 2026 US HTS.
Are Section 301 tariffs applicable to goods under Heading 9027?
Section 301 additional tariffs depend on the specific 8-digit or 10-digit US HTS code and country of origin (e.g. China Lists 1–4A).
What PGA message set flags apply to Heading 9027?
Partner Government Agency flags (FDA, USDA APHIS, EPA) apply depending on the specific commodity sub-classification.
How do I distinguish between subheadings under Heading 9027?
Review WCO subheading terms and candidate descriptions. For example, unroasted vs. roasted or decaffeinated vs. non-decaffeinated.
Can goods under Heading 9027 enter duty-free under USMCA?
Yes. Goods originating in USMCA territories (US, Mexico, Canada) enter duty-free under SPI code P with a valid Certificate of Origin.
What is the Section 321 de minimis limit for Heading 9027?
Eligible import shipments valued at $800 USD or less imported by one person on one day enter duty-free under 19 U.S.C. 1321.
What documents are required for formal customs entry of Heading 9027?
Commercial Invoice, Packing List, Bill of Lading, and CBP Form 7501 are mandatory for entries exceeding $2,500 USD.
How can an importer get a binding CBP classification ruling for Heading 9027?
Importers may apply for a binding ruling via CBP National Commodity Specialist Division under 19 CFR Part 177.