Orifice plates, venturi tubes, and nozzles are part of which group?

Orifice plates, venturi tubes, and nozzles are classified as flow meters because their primary function is to measure the flow rate of fluids. These devices operate based on the principle of fluid dynamics, where they create a differential pressure that correlates with the velocity of the fluid passing through them.

When fluid flows through an orifice plate, venturi tube, or nozzle, it experiences a change in pressure; the flow rate can then be calculated based on the pressure difference and the properties of the fluid. The design of these instruments allows them to be highly effective in various applications, from industrial processes to water supply systems, enabling users to monitor and control fluid movement efficiently.

This classification distinguishes them from other types of meters, such as pressure meters, which measure the static pressure within a system, and head meters, which might indicate fluid height or pressure relative to a specific reference point. Analog meters may represent a broader category that includes various measurement devices, but the defining characteristic of orifice plates, venturi tubes, and nozzles is their role in quantifying flow rate rather than measuring pressure or levels.