9029.20 - Speedometers and tachometers; stroboscopes:

Heading 9029.20 specifically encompasses devices for measuring rotational speed and timing, namely speedometers and tachometers, as well as stroboscopes. Speedometers are primarily designed to indicate the rate of linear motion (speed), while tachometers measure the rate of rotation. This category also includes stroboscopes, which are devices that produce flashing light at controlled frequencies, often used for observing moving objects at high speed. The scope of this heading is limited to these specific measuring instruments, excluding those falling under broader headings like 9014 (navigation instruments) or 9015 (surveying instruments).

This heading is distinguished from its siblings by its focus on rotational and linear speed measurement and stroboscopic functionality. Heading 9029.10 covers counters such as revolution counters, production counters, taximeters, odometers, and pedometers, which primarily track accumulated quantities or distances rather than instantaneous rates of motion. Heading 9029.90 is reserved exclusively for parts and accessories of the instruments classified within the entire 9029 heading.

Within 9029.20, further distinctions are made to refine classification. Subcategory 9029.20.20.00 specifically addresses bicycle speedometers, highlighting a particular application. The broader "Other speedometers and tachometers" under 9029.20.40 captures a wide range of devices used in automotive, industrial, and other sectors. Finally, stroboscopes are separately classified under 9029.20.60.00, allowing for specific import/export considerations for this distinct type of instrument.