9902.16.95 - Position sensors, each designed to emit digital pulses when rotated or moved linearly, consisting of an outer housing with dimensions of approximately 67 mm by 50 mm by 24 mm that contains an electrical connector and a printed circuit assembly, such sensors certified by the importer as designed for use in ground-based observatories (provided for in subheading 8543.70.45)

This HTS category, 9902.16.95, specifically covers specialized position sensors designed for use in ground-based observatories. These sensors are characterized by their digital pulse output upon rotation or linear movement, and feature an outer housing of approximately 67 mm x 50 mm x 24 mm containing an electrical connector and a printed circuit assembly. Their critical differentiator is the importer's certification of their intended application within the specific environment of ground-based astronomical observation.

As a provision within Chapter 99, which deals with temporary legislation and modifications, this code signifies a specific, potentially time-limited, tariff treatment or reporting requirement. Unlike the broad categories of goods found in earlier chapters of the HTS, such as live animals (Chapters 01), this provision focuses on a highly technical component with a defined end-use. Its placement within Section XXII further underscores its nature as a special classification provision.

Given that this is a leaf node, there are no further subcategories. Classification into 9902.16.95 is final, contingent upon meeting all stipulated criteria, including the certified end-use in ground-based observatories and the physical characteristics described. The classification is distinct from general position sensors which would be classified under their respective functional headings, such as 8543.70.45, unless specifically directed here by the temporary provisions of Chapter 99.