What is the purpose of a demand meter?

A demand meter is specifically designed to measure both average power usage and peak consumption over a given period. This capability is crucial for understanding the electrical demand of water facilities, especially those that operate large pumping stations or treatment plants. By identifying peak consumption periods, operators can implement strategies to reduce energy costs, optimize pump schedules, and manage operational efficiency effectively.

In the context of water systems, understanding energy demand plays a significant role in cost management and operational planning. For example, if a facility frequently spikes in energy demand, it can indicate that adjustments may be needed either in terms of pump operation or load management strategies.

The other options reflect different functions that do not pertain to the primary purpose of a demand meter. Measuring water pressure over time pertains to pressure gauges, evaluating pump efficiency relates to performance analysis tools, and controlling flow rates is associated with flow control devices rather than demand meters.