9028 - Gas, liquid or electricity supply or production meters, including calibrating meters thereof; parts and accessories thereof:

This HTS category, 9028, encompasses meters designed for the precise measurement of the supply or production of essential utilities such as gas, liquid, and electricity. It includes devices intended for revenue collection, consumption tracking, or quality control in these sectors. The scope extends to include calibrating meters that verify the accuracy of these primary measurement devices, ensuring their continued reliability.

Distinguishing this category from its sibling entries within Chapter 90 requires focusing on the specific function of measurement and the nature of the substance or energy being metered. While other instruments in Chapter 90 might measure physical dimensions, temperature, or pressure, 9028 is exclusively for flow and consumption of gas, liquid, or electricity. Unlike broader categories that might include scientific or laboratory equipment, these meters are typically designed for utility infrastructure and end-user applications.

The subcategories within 9028 reflect the distinct types of media being measured. 9028.10.00.00 specifically covers gas meters, such as diaphragm or turbine meters. 9028.20.00.00 is dedicated to liquid meters, including water meters and flow meters for various industrial fluids. 9028.30.00.00 pertains to electricity meters, the familiar devices used to measure electrical energy consumption. Finally, 9028.90.00 captures all parts and accessories integral to the function and maintenance of these meters, such as seals, electronic components, or casings.