9027.10

Analysis

Subheading 9027.10 covers gas or smoke analysis apparatus, within heading 9027. The first six digits are shared by every country that uses the Harmonized System, so this part of the code is the same in the US, UK and EU schedules; the 3 US tariff lines below it are national.

Every one of its 3 tariff lines is duty-free at the general rate, so classification within the subheading affects statistics and Chapter 99 measures rather than the base duty.

The US splits it as follows: 9027.10.20 for gas or smoke analysis apparatus: electrical (duty-free), 9027.10.40 for optical instruments and apparatus (duty-free) and 9027.10.60 for other: other (duty-free).

By Census's concordance, most of its statistical lines are made by Analytical Laboratory Instrument Manufacturing (334516). Those are the NAICS industries a US producer of these goods would report under.

Goods only reach 9027.10 once they fall within heading 9027 (instruments and apparatus for physical or chemical analysis (for example, polarimeters…). Under General Rule 6, subheadings are then compared only with others at the same level, so a product is matched against its siblings, not against lines elsewhere in the chapter.