What device is useful for determining the quantity and pressure of water in a municipal system?

A flow meter is an important device used for determining the quantity of water moving through a municipal system, providing data on the flow rate. This information is crucial for managing water distribution, ensuring adequate supply to various areas, and monitoring usage patterns. Flow meters can help water utilities understand how much water is being delivered, thereby allowing for effective resource management and infrastructure planning.

In the context of a municipal water system, while a pressure gauge measures the pressure of the water in the system, it does not directly provide information on the volume of water flowing. A hydrometer is used to measure the specific gravity of liquids, which is not applicable to this context. Similarly, a barometer measures atmospheric pressure and is not related to water flow or quantity measurements in a municipal system. Hence, the flow meter stands out as the most relevant device for measuring water quantity in such systems.