# United States tariff line 9022.29.40.00: Smoke detectors, ionization type

> In the United States tariff, line 9022.29.40.00 covers apparatus based on the use of alpha, beta, gamma or other ionizing radiations, whether or not for medical, surgical, dental or veterinary uses, including radiography or radiotherapy apparatus, for other uses, smoke detectors, ionization type. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 9022.29 in heading 90.22 (chapter 90).

Source: https://border.bot/countries/united-states/hs-codes/9022294000
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 90](https://border.bot/countries/united-states/hs-codes/90) / [9022.29](https://border.bot/countries/united-states/hs-codes/902229) / [9022.29.40.00](https://border.bot/countries/united-states/hs-codes/9022294000)

## Key facts

- Tariff line: 9022.29.40.00
- Covers: Apparatus based on the use of alpha, beta, gamma or other ionizing radiations, whether or not for medical, surgical, dental or veterinary uses, including radiography or radiotherapy apparatus, for other uses, smoke detectors, ionization type
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [9022.29](https://border.bot/hs-codes/902229)

## What this line covers

In the United States tariff, line 9022.29.40.00 covers apparatus based on the use of alpha, beta, gamma or other ionizing radiations, whether or not for medical, surgical, dental or veterinary uses, including radiography or radiotherapy apparatus, for other uses, smoke detectors, ionization type.

Its legal text is “Smoke detectors, ionization type”, read under “Apparatus based on the use of alpha, beta, gamma or other ionizing radiations, whether or not for medical, surgical, dental or veterinary uses, including radiography or radiotherapy apparatus” and “For other uses”.

## How it is structured

It falls under HS subheading 9022.29 in heading 90.22 (chapter 90). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 90: Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof
- Heading 90.22: Apparatus based on the use of X-rays or of alpha, beta, gamma or other ionizing radiations, whether or not for medical, surgical, dental or veterinary uses, including radiography or radiotherapy apparatus, X-ray tubes and other X-ray generators, high tension generators, control panels and desks, screens, examination or treatment tables, chairs and the like; parts and accessories thereof
- Subheading 9022.29: Apparatus based on the use of alpha, beta, gamma or other ionizing radiations, whether or not for medical, surgical, dental or veterinary uses, including radiography or radiotherapy apparatus
- Within the subheading: For other uses
- Line 9022.29.40.00: Smoke detectors, ionization type

## Duty

Goods under this line enter free of general (MFN) duty.

## In other countries

No other national tariff on border.bot has live lines under 9022.29 yet.

- [The Harmonized System text for 9022.29](https://border.bot/hs-codes/902229)

## Other lines under 9022.29

- [9022.29.80.00](https://border.bot/countries/united-states/hs-codes/9022298000) Other

- Previous line: [9022.21.00.00](https://border.bot/countries/united-states/hs-codes/9022210000) For medical, surgical, dental or veterinary uses
- Next line: [9022.29.80.00](https://border.bot/countries/united-states/hs-codes/9022298000) Other

## Frequently asked questions

### What does tariff line 9022.29.40.00 cover in the United States tariff?

In the United States tariff, line 9022.29.40.00 covers apparatus based on the use of alpha, beta, gamma or other ionizing radiations, whether or not for medical, surgical, dental or veterinary uses, including radiography or radiotherapy apparatus, for other uses, smoke detectors, ionization type.

### What is the general (MFN) duty on 9022.29.40.00 in the United States?

Goods under this line enter free of general (MFN) duty.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/9022294000.json