9030.90.89 - Other

This HTS category, 9030.90.89, encompasses "Other" parts and accessories for instruments and apparatus used for measuring or checking electrical quantities, or for measuring/detecting ionizing radiations. These are components that do not fit into more specifically defined subcategories of parts and accessories within heading 9030. The scope includes a wide array of miscellaneous items such as specialized connectors, mounting hardware, replacement probes, filters, and housings, provided they are solely or principally used with the instruments described in heading 9030.

This classification differs from its sibling, 9030.90.84, which specifically covers parts and accessories for instruments and apparatus classified under subheading 9030.82. Therefore, 9030.90.89 serves as a residual category for parts and accessories that are not explicitly tied to the instruments detailed in 9030.82.

The subcategories within 9030.90.89 further refine the classification based on the specific type of instrument to which the part or accessory relates. These include subdivisions for parts of oscilloscopes (9030.90.89.11), multimeters and voltage/current meters (9030.90.89.21, 9030.90.89.22, 9030.90.89.23, 9030.90.89.31), frequency counters (9030.90.89.40), and instruments for measuring ionizing radiation (9030.90.89.56). The final subcategory, 9030.90.89.61, acts as a further residual for parts and accessories that do not fall into any of the preceding specific subdivisions.