Water meters are devices used to measure the water consumption of residential and commercial buildings.

There are several types of water meters in use. The final choice depends on the flow measurement method, the end user profile, the required flow rates and accuracy requirements.

There are two common approaches to flow measurement, displacement and velocity.

There are also non-mechanical designs, such as electromagnetic and ultrasonic meters, and meters designed for special uses.

Most meters in a typical water distribution system are designed to measure cold potable water only.

Specialty hot water meters are designed with materials that can withstand higher temperatures.