9026.90.40.00 - Of flow meters, heat meters incorporating liquid supply meters and anemometers

This HTS category, 9026.90.40.00, specifically covers parts and accessories for a defined set of measuring instruments. These instruments include flow meters, which measure the volume or rate of fluid or gas passing through a point; heat meters that incorporate a liquid supply meter to track both fluid usage and associated heat consumption; and anemometers, used to measure wind speed and direction. The "parts and accessories" designation means this category applies to components that are integral to the functioning of these specific meters but are not the complete units themselves.

When classifying under 9026.90, it is crucial to distinguish this subcategory from its sibling, 9026.90.60.00, which is designated as "Other." While both fall under the broader "parts and accessories" for instruments in heading 9026, 9026.90.40.00 is for those specifically related to flow meters, heat meters incorporating liquid supply meters, and anemometers. Category 9026.90.60.00 would therefore encompass parts and accessories for other types of instruments covered under the main heading 9026, such as parts for manometers or level gauges, which are not explicitly listed in the description for 9026.90.40.00.

As this HTS code represents a leaf node, there are no further subcategories to introduce. Therefore, classification within 9026.90.40.00 relies on confirming that the part or accessory is intended for use with a flow meter, a heat meter that includes a liquid supply meter, or an anemometer. The classification hinges on the specific nature and intended application of the component, ensuring it directly contributes to the measurement functions of these particular apparatuses.