9022.90.70.00 - Of smoke detectors, ionization type

This HTS classification, 9022.90.70.00, specifically designates parts and accessories pertaining to ionization-type smoke detectors. These components are integral to the functioning of devices that utilize ionizing radiation to detect the presence of smoke. The "ionization type" specification is crucial, differentiating these parts from those used in other smoke detection technologies.

When classifying items within heading 9022, it is important to distinguish this subcategory from its siblings. For instance, 9022.90.60.00 covers parts and accessories for general X-ray apparatus, which have a broader application than the specialized smoke detection devices covered here. Similarly, 9022.90.95.00 encompasses "other" parts and accessories within the broader category, meaning items not specifically enumerated elsewhere in the 9022.90 series. Therefore, 9022.90.70.00 is reserved for components uniquely associated with ionization smoke detection technology.

As this is a leaf node in the HTS structure, there are no further subdivisions. Classification within this code relies on the direct association of the part or accessory with an ionization smoke detector. Examples of items that would fall under this classification include specialized sensing chambers, ionization sources, or any replacement components specifically manufactured for and exclusively used in the operation of ionization smoke detection systems. The primary criterion for classification is the direct functional link to this specific type of smoke detection apparatus.