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
In chapter 90, Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof. 23 rate lines, laid out as HTS Revision 20 (2026) prints them.
| HTS number | Description | Units | General | Special | Column 2 |
|---|---|---|---|---|---|
| 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: | ||||
| 9027.10 | Gas or smoke analysis apparatus: | ||||
| 9027.10.20.00 | Electrical | kg, No. | Free | 40% | |
| Other: | |||||
| 9027.10.40.00 | Optical instruments and apparatus | kg | Free | 50% | |
| 9027.10.60.00 | Other | kg | Free | 40% | |
| 9027.20 | Chromatographs and electrophoresis instruments: | ||||
| 9027.20.50 | Electrical | Free | 40% | ||
| 9027.20.50.30 | Electrophoresis instruments | No. | |||
| 9027.20.50.50 | Gas chromatographs | No. | |||
| 9027.20.50.60 | Liquid chromatographs | No. | |||
| 9027.20.50.80 | Other | No. | |||
| 9027.20.80 | Other | Free | 40% | ||
| 9027.20.80.30 | Gas chromatographs | No. | |||
| 9027.20.80.60 | Liquid chromatographs | No. | |||
| 9027.20.80.90 | Other | No. | |||
| 9027.30 | Spectrometers, spectrophotometers and spectrographs using optical radiations (ultraviolet, visible, infrared): | ||||
| 9027.30.40 | Electrical | Free | 40% | ||
| 9027.30.40.40 | Spectrophotometers | No. | |||
| 9027.30.40.80 | Other | No. | |||
| 9027.30.80 | Other | Free | 50% | ||
| 9027.30.80.20 | Spectroscopes | No. | |||
| 9027.30.80.80 | Other | No. | |||
| 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% |
| Other: | |||||
| 9027.50.40 | Electrical | Free | 40% | ||
| 9027.50.40.15 | Chemical analysis instruments and apparatus | No. | |||
| 9027.50.40.20 | Thermal analysis instruments and apparatus | No. | |||
| 9027.50.40.50 | Photometers | No. | |||
| 9027.50.40.60 | Other | No. | |||
| 9027.50.80 | Other | Free | 50% | ||
| 9027.50.80.15 | Chemical analysis instruments and apparatus | No. | |||
| 9027.50.80.20 | Thermal analysis instruments and apparatus | No. | |||
| 9027.50.80.60 | Other | No. | |||
| Other instruments and apparatus: | |||||
| 9027.81.00.00 | Mass spectrometers | No. | Free | 40% | |
| 9027.89 | Other: | ||||
| 9027.89.25.00 | Nuclear magnetic resonance instruments | No. | Free | 40% | |
| Other: | |||||
| 9027.89.45 | Electrical | Free | 40% | ||
| 9027.89.45.30 | Chemical analysis instruments and apparatus | kg | |||
| 9027.89.45.60 | Physical analysis instruments and apparatus | kg | |||
| 9027.89.45.90 | Other | kg | |||
| 9027.89.80 | Other | Free | 40% | ||
| 9027.89.80.30 | Chemical analysis instruments and apparatus | kg | |||
| 9027.89.80.60 | Physical analysis instruments and apparatus | kg | |||
| 9027.89.80.90 | Other | kg | |||
| 9027.90 | Microtomes; parts and accessories: | ||||
| 9027.90.20.00 | Microtomes | No. | Free | 40% | |
| 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% | |
| Other: | |||||
| 9027.90.54.00 | Of electrophoresis instruments not incorporating an optical or other measuring device | kg | Free | 40% | |
| 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 | |||
| 9027.90.56.30 | Of articles of subheading 9027.30.40 | kg | |||
| 9027.90.56.40 | Of articles of subheading 9027.50.10 | kg | |||
| 9027.90.56.50 | Of articles of subheading 9027.50.40 | kg | |||
| 9027.90.56.95 | Other | kg | |||
| 9027.90.59 | Other | Free | 40% | ||
| 9027.90.59.10 | Of articles of subheading 9027.10.20 | kg | |||
| 9027.90.59.95 | Other | kg | |||
| 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% | |
| 9027.90.68.00 | Other | kg | Free | 50% | |
| 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% | |
| 9027.90.88.00 | Other | kg | Free | 40% |
Rates are quoted as printed. Each 8-digit number opens its own page with footnotes and cited chapter 99 headings.
Watch lines in heading 9027
Pick the 8 or 10 digit numbers you import and we email you the old and new text whenever a new HTS revision changes them.
See the alert plansNo line in this heading cites a chapter 99 heading in its footnotes or rate columns.
What this page leaves to your broker
This page quotes the schedule. It does not add the rates together, and it does not say whether a chapter 99 heading applies to a shipment: that turns on the country of origin, the dates and the U.S. notes to chapter 99. Section 301, Section 232 and other chapter 99 measures list the goods they cover in those notes and in Federal Register notices, so a line can be covered by a heading its footnotes never cite. A licensed customs broker makes the determination.
Built September 29, 2026 from HTS Revision 20 (2026) (USITC release 2026HTSRev20, published September 23, 2026, current since September 28, 2026). The schedule changes often; USITC's own site always has the current text.