9030.90.89.23 - Of articles of subheading 9030.33

This HTS classification, 9030.90.89.23, specifically covers parts and accessories for instruments and apparatus used for measuring or checking electrical quantities that fall under subheading 9030.33. These parts and accessories are not parts of oscilloscopes, spectrum analyzers, or other instruments for measuring electrical quantities (as covered by 9030.31, 9030.32, or 9030.39), nor are they specifically for articles of subheading 9030.20 (which generally covers cathode-ray oscilloscopes).

The primary function of items classified here is to support or enhance the operation of the electrical measuring or checking instruments of subheading 9030.33. Examples of such parts and accessories could include specialized probes, cables, connectors, power supplies, signal conditioners, or mounting hardware, all designed to interface with or facilitate the use of the parent devices. Classification is determined by the specific function and intended use of the part or accessory in relation to the electrical measuring or checking apparatus.

As this is a leaf node, there are no further subdivisions within this category. Therefore, the classification of a specific part or accessory hinges on its direct relationship and intended application with instruments falling under subheading 9030.33. If an item is not a part of an electrical measuring instrument and instead relates to instruments for detecting ionizing radiations, or if it is a complete instrument itself, it would be classified elsewhere within Chapter 90.