Automatic regulating or controlling instruments and — HTS 9032
Automatic regulating or controlling instruments and apparatus; parts and accessories thereof
Chapter 90 › Heading 9032
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 9032 is a four-digit category for automatic regulating or controlling instruments and apparatus, plus their parts and accessories. These are devices that measure or sense a condition—such as temperature, pressure, flow, or another variable—and automatically adjust a process to keep that condition at a chosen level. The heading generally concerns automatic control equipment, not ordinary switches or instruments that only display a measurement.
To reach a specific eight-digit U.S. HTS code, first identify whether the item is a complete instrument, a control apparatus, or a part or accessory. Then use the heading’s subheadings and statistical provisions, which commonly distinguish the instrument’s control function, operating principle, or type and may also distinguish material or construction where the tariff text requires it. Confirm the product’s actual function, sensing method, control mechanism, and intended use against the official HTS wording, section and chapter notes, and any applicable exclusions.
What to check
- Describe exactly what the item senses, what it controls, and how it automatically changes the process.
- Determine whether the shipment is a complete regulating instrument, a separate control unit, or a dedicated part or accessory.
- Check whether the device merely measures or indicates a condition; nonautomatic measuring equipment may belong elsewhere.
- Compare the product’s operating principle—such as electronic, mechanical, hydraulic, or pneumatic operation—with the applicable subheading descriptions.
- Verify the proposed eight-digit code in the current official HTS and obtain customs-broker or classification-ruling advice when the product has multiple functions or an uncertain principal function.
HTS heading 9032 summary
Automatic regulating or controlling instruments and is a 4-digit product category containing 2 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 |
|---|---|
| 9032.90 | Parts and accessories |
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 |
|---|---|---|---|---|
| 9032.10.00 👉 | Thermostats | 1.7% | Free | 40% |
| 9032.20.00.00 👉 | Manostats | Free | — | 35% |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 9032?
Automatic regulating or controlling instruments and apparatus; 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.