HTS heading 9027 · Chapter 90
HTS 9027: Instruments and apparatus for physical or chemical…
HTS 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. It has 23 tariff lines with a duty rate; the general (MFN) rates are Free (22 lines), 1.2% (1 line).
Imports may also owe Chapter 99 tariffs (Section 232, 301 or 201) depending on origin and date, plus the Merchandise Processing Fee and, by sea, the Harbor Maintenance Fee.
Rates from the 2026 HTS Revision 22, effective October 30, 2026. Source: U.S. International Trade Commission.
Tariff lines and duty rates
| HTS code | Description | General | Special | Column 2 | Estimate |
|---|---|---|---|---|---|
| 9027.10 | Gas or smoke analysis apparatus: | ||||
| 9027.10.20.00 | Electrical[kg, No.] | Free | 40% | Estimate → | |
| Other: | |||||
| 9027.10.40.00 | Optical instruments and apparatus[kg] | Free | 50% | Estimate → | |
| 9027.10.60.00 | Other[kg] | Free | 40% | Estimate → | |
| 9027.20 | Chromatographs and electrophoresis instruments: | ||||
| 9027.20.50 | Electrical | Free | 40% | ||
| 9027.20.50.30 | Electrophoresis instruments[No.] | Estimate → | |||
| 9027.20.50.50 | Gas chromatographs[No.] | Estimate → | |||
| 9027.20.50.60 | Liquid chromatographs[No.] | Estimate → | |||
| 9027.20.50.80 | Other[No.] | Estimate → | |||
| 9027.20.80 | Other | Free | 40% | ||
| 9027.20.80.30 | Gas chromatographs[No.] | Estimate → | |||
| 9027.20.80.60 | Liquid chromatographs[No.] | Estimate → | |||
| 9027.20.80.90 | Other[No.] | Estimate → | |||
| 9027.30 | Spectrometers, spectrophotometers and spectrographs using optical radiations (ultraviolet, visible, infrared): | ||||
| 9027.30.40 | Electrical | Free | 40% | ||
| 9027.30.40.40 | Spectrophotometers[No.] | Estimate → | |||
| 9027.30.40.80 | Other[No.] | Estimate → | |||
| 9027.30.80 | Other | Free | 50% | ||
| 9027.30.80.20 | Spectroscopes[No.] | Estimate → | |||
| 9027.30.80.80 | Other[No.] | Estimate → | |||
| 9027.50 | Other instruments and apparatus using optical radiations (ultraviolet, visible, infrared): | ||||
| 9027.50.10.00 | Exposure meters[No.] | 1.2% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 27.5% | Estimate → |
| Other: | |||||
| 9027.50.40 | Electrical | Free | 40% | ||
| 9027.50.40.15 | Chemical analysis instruments and apparatus[No.] | Estimate → | |||
| 9027.50.40.20 | Thermal analysis instruments and apparatus[No.] | Estimate → | |||
| 9027.50.40.50 | Photometers[No.] | Estimate → | |||
| 9027.50.40.60 | Other[No.] | Estimate → | |||
| 9027.50.80 | Other | Free | 50% | ||
| 9027.50.80.15 | Chemical analysis instruments and apparatus[No.] | Estimate → | |||
| 9027.50.80.20 | Thermal analysis instruments and apparatus[No.] | Estimate → | |||
| 9027.50.80.60 | Other[No.] | Estimate → | |||
| Other instruments and apparatus: | |||||
| 9027.81.00.00 | Mass spectrometers[No.] | Free | 40% | Estimate → | |
| 9027.89 | Other: | ||||
| 9027.89.25.00 | Nuclear magnetic resonance instruments[No.] | Free | 40% | Estimate → | |
| Other: | |||||
| 9027.89.45 | Electrical | Free | 40% | ||
| 9027.89.45.30 | Chemical analysis instruments and apparatus[kg] | Estimate → | |||
| 9027.89.45.60 | Physical analysis instruments and apparatus[kg] | Estimate → | |||
| 9027.89.45.90 | Other[kg] | Estimate → | |||
| 9027.89.80 | Other | Free | 40% | ||
| 9027.89.80.30 | Chemical analysis instruments and apparatus[kg] | Estimate → | |||
| 9027.89.80.60 | Physical analysis instruments and apparatus[kg] | Estimate → | |||
| 9027.89.80.90 | Other[kg] | Estimate → | |||
| 9027.90 | Microtomes; parts and accessories: | ||||
| 9027.90.20.00 | Microtomes[No.] | Free | 40% | Estimate → | |
| Parts and accessories: | |||||
| Of electrical instruments and apparatus: | |||||
| 9027.90.45.00 | Printed circuit assemblies for the goods of subheading 9027.81 or 9027.89[No.] | Free | 40% | Estimate → | |
| Other: | |||||
| 9027.90.54.00 | Of electrophoresis instruments not incorporating an optical or other measuring device[kg] | Free | 40% | Estimate → | |
| 9027.90.56 | Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 9027.81 or 9027.89 | Free | 40% | ||
| 9027.90.56.25 | Of articles of subheading 9027.20.50[kg] | Estimate → | |||
| 9027.90.56.30 | Of articles of subheading 9027.30.40[kg] | Estimate → | |||
| 9027.90.56.40 | Of articles of subheading 9027.50.10[kg] | Estimate → | |||
| 9027.90.56.50 | Of articles of subheading 9027.50.40[kg] | Estimate → | |||
| 9027.90.56.95 | Other[kg] | Estimate → | |||
| 9027.90.59 | Other | Free | 40% | ||
| 9027.90.59.10 | Of articles of subheading 9027.10.20[kg] | Estimate → | |||
| 9027.90.59.95 | Other[kg] | Estimate → | |||
| Other: | |||||
| Of optical instruments and apparatus: | |||||
| 9027.90.64.00 | Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 9027.81 or 9027.89[kg] | Free | 50% | Estimate → | |
| 9027.90.68.00 | Other[kg] | Free | 50% | Estimate → | |
| Other: | |||||
| 9027.90.84.00 | Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 9027.81 or 9027.89[kg] | Free | 40% | Estimate → | |
| 9027.90.88.00 | Other[kg] | Free | 40% | Estimate → |
54 lines shown. Statistical suffixes (the last two digits) inherit the rate of the 8-digit subheading above them.
Example: base duty and fees on $10000
For HTS 9027.50.10.00 at the general rate of 1.2%, shipped by ocean, before any Chapter 99 tariffs:
| Base duty (1.2%) | $120.00 |
| Merchandise Processing Fee (0.3464%, min $34.58) | $34.64 |
| Harbor Maintenance Fee (0.125%) | $12.50 |
| Duty and fees | $167.14 |
Origin-specific tariffs can multiply this. Run this example from China or from Mexico to see every line.
Special program codes in this heading
- A, A*, A+
- Generalized System of Preferences (GSP)
- AU
- U.S.–Australia FTA
- BH
- U.S.–Bahrain FTA
- CL
- U.S.–Chile FTA
- CO
- U.S.–Colombia Trade Promotion Agreement
- D
- African Growth and Opportunity Act (AGOA)
- E, E*
- Caribbean Basin Economic Recovery Act
- IL
- U.S.–Israel FTA
- JO
- U.S.–Jordan FTA
- KR
- U.S.–Korea FTA (KORUS)
- MA
- U.S.–Morocco FTA
- OM
- U.S.–Oman FTA
- P, P+
- CAFTA-DR
- PA
- U.S.–Panama Trade Promotion Agreement
- PE
- U.S.–Peru Trade Promotion Agreement
- S, S+
- USMCA (United States–Mexico–Canada Agreement)
- SG
- U.S.–Singapore FTA
A special rate applies only when the goods qualify under that program's rules of origin and the claim is made at entry.
Frequently asked questions
What is the duty rate for HTS 9027?
Heading 9027 has 23 rate lines. The general (MFN) duty rates are Free (22 lines), 1.2% (1 line). Products of free trade agreement partners may enter at the special rate, and Column 2 rates apply to countries without normal trade relations. Chapter 99 tariffs can be added on top: calculate the full amount.
Do Section 301, 232 or 201 tariffs apply to HTS 9027?
It depends on the 8- or 10-digit subheading, the country of origin, the entry date and, for Section 232, the metal content. These additional duties are listed in Chapter 99 of the HTS. The free duty calculator checks each program for a given code, origin and date and shows which apply and why.
What fees are added to an import under HTS 9027?
Formal entries pay the Merchandise Processing Fee of 0.3464% of value (minimum $34.58, maximum $670.86 in FY2027). Ocean shipments also pay the Harbor Maintenance Fee of 0.125% of value. See the import duty calculator for how they combine.