9620.00.30.20 - Of theodolites and tachymeters

This HTS category, 9620.00.30.20, specifically encompasses accessories for surveying instruments and appliances, with a particular focus on those designed for use with theodolites and tachymeters. Theodolites are precision instruments used for measuring angles horizontally and vertically, crucial for surveying, engineering, and construction. Tachymeters, often a type of theodolite, also incorporate stadia lines or other mechanisms for simultaneously measuring horizontal distance and vertical elevation. Therefore, this classification covers items such as specialized mounting brackets, protective cases, calibration tools, or other supporting accessories directly intended for these angular and distance measuring surveying devices.

Distinguishing this category from its siblings, it is important to note that 9620.00.30.20 is distinct from accessories classified under 9620.00.30.10 (rangefinders), which focus on devices that measure distance directly. It also differs from accessories for levels (9620.00.30.30), which are primarily used to establish a horizontal plane. Similarly, accessories for photogrammetrical surveying instruments, seismographs, and other geophysical apparatus are categorized separately, reflecting the unique functionalities and applications of those respective instruments.

As 9620.00.30.20 represents a leaf node within the HTS structure, there are no further subcategories. Classification within this specific code hinges on the direct and intended use of the accessory in conjunction with a theodolite or tachymeter. For example, a tripod designed for general use might fall under a broader tripod classification, but a tripod specifically engineered with the stability and mounting features required for a theodolite would be classified here. The purpose and design of the accessory to facilitate the accurate operation of these specific surveying instruments are paramount for correct classification.