Hydrometers and similar floating instruments — HTS 9025
Hydrometers and similar floating instruments, thermometers, pyrometers, barometers, hygrometers and psychrometers, recording or not, and any combination of these instruments; parts and accessories thereof
Chapter 90 › Heading 9025
2026 HTS Rev 19 Synced Rules verified Operational
Written to help non-specialists understand this page. Rates, dates, and legal facts come from the official records above and on the linked source.
HTS heading 9025 is a broad product category for instruments that measure physical conditions or properties. It groups hydrometers and similar floating instruments, thermometers, pyrometers, barometers, hygrometers, psychrometers, combinations of these instruments, and their parts and accessories. The instruments may be recording or non-recording.
A merchant must narrow the product from heading 9025 to the correct 8-digit HTSUS subheading. The lower-level code commonly distinguishes the instrument’s specific type, function, construction, or material—for example, whether it is a thermometer, a floating instrument, a barometer, or a part. Classification depends on the item as imported, including its design and principal function, not merely its marketing name.
What to check
- Identify the instrument’s exact measuring function and whether it is a complete instrument, a combination, or a part or accessory.
- Check the product’s construction and sensing method, such as liquid-filled, electronic, or another design, because subheadings may distinguish types or materials.
- Review the HTSUS heading, subheading descriptions, and legal notes together; do not choose a code based only on a search keyword or catalog title.
- Use product specifications, photographs, technical drawings, and manuals to support the classification decision.
- Confirm difficult or borderline classifications with a licensed customs broker or request a binding ruling from U.S. Customs and Border Protection.
HTS heading 9025 summary
Hydrometers and similar floating instruments is a 4-digit product category containing 1 published product-code lines in this snapshot. A heading does not carry one universal duty rate; classification must be narrowed to the line matching the product facts.
How to find your code in this category
A heading is a product category. To get the exact duty, narrow from this 4-digit heading to a sub-category (usually by material), then open the 8-digit code that matches your product.
Open any code in the tables below to see its exact duty rate, a duty calculator (enter your shipment value → estimated duty and landed cost), the rate-change history chart, and the country-by-country breakdown (including Section 301/232 add-on duties).
Why you have to click in: a single category can contain products with very different duties. The rate depends on the specific product — its material and construction — and on the country of origin, and those only get pinned down at the 8-digit code level. That is why this page points you to codes instead of showing one rate for the whole category.
Sub-categories
| Code | Description |
|---|---|
| 9025.11 | Liquid-filled, for direct reading |
| 9025.19 | Other |
| 9025.80 | Other instruments |
Product codes & duty rates
👇 Each row is a specific product code — click a blue code to open its full page with exact duty rates by country, the rate-history chart, and a duty calculator. 👉
| Code | Description | General (MFN) | Special | Column 2 |
|---|---|---|---|---|
| 9025.90.06.00 👉 | Parts and accessories | Free | — | The rate applicable to the article of which it is a part or accessory |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 9025?
Hydrometers and similar floating instruments, thermometers, pyrometers, barometers, hygrometers and psychrometers, recording or not, and any combination of these instruments; parts and accessories thereof. To classify a specific item you must pick the matching sub-category and 8-digit code above; the right choice usually depends on the material and construction of the product.
How do I choose the right code within this category?
Start from the sub-categories (typically divided by material—for example cotton versus man-made fibers), then open the active 8- or 10-digit code that matches the product. When unsure, a licensed customs broker or a CBP binding ruling can confirm the classification.
Reference information only, not customs, legal, or classification advice. Confirm the current code and rate against the official HTS before you import.