What type of meter is composed of two meters capable of reading both small and large flows?

A compound meter is designed specifically to measure varying flow rates, making it an essential tool for applications where both low-flow and high-flow conditions exist. This type of meter combines two different measurement technologies—typically a positive displacement mechanism for low flows and a turbine or velocity-based mechanism for higher flows. This dual mechanism allows for accurate measurement across a wide range of flow rates without losing precision.

In operations where water usage can vary significantly, such as in commercial or industrial applications, being able to accurately read both small and large flows is crucial for billing and monitoring purposes. The compound design ensures that regardless of flow conditions, the meter remains responsive, providing reliable data for water usage analysis.

The other types of meters, while effective in their respective contexts, specialize in either low or high flow detection or use a single technology for measuring flow, which limits their functionality in varying flow scenarios.