What is a nutating disc?

A nutating disc refers specifically to a type of water meter designed for small diameter domestic service, which measures the volume of water that passes through it. This type of meter uses a disc that tilts and rotates with the flow of water. As water flows through the meter, it causes the disc to nutate, or move in a circular pattern, which ultimately drives a mechanical counter that records the water usage.

This design allows for accurate measurement of low flow rates, making it suitable for residential applications where water flow needs to be monitored precisely. Nutating disc water meters are commonly used in homes to measure water consumption for billing purposes.

In contrast, other options like water pumps, filtration devices, and chemical dosing equipment serve different functions in water treatment and distribution systems, focusing on either moving water, removing impurities, or adding chemicals, rather than directly measuring water flow.