Radial-vane, concentric-vane, and plunger are all examples of what type of meter movement?

Radial-vane, concentric-vane, and plunger are all types of mechanical meter movements, specifically designed for measuring fluid flow or pressure through their mechanical systems. These movements operate based on physical mechanisms where components move in response to fluid dynamics, allowing them to provide a measurement of the physical quantity being monitored, such as flow rate or pressure.

Mechanical meter movements use mechanical parts, such as gears or levers, which are driven by the movement of a fluid or gas, resulting in the direct measurement of the variable being assessed. The action of the medium alters the position of a pointer across a scale on the meter, providing the user with a visual reading.

While digital meter movements rely on electronic components to measure and display data, and electromagnetic meter movements utilize principles of electromagnetism for their operation, the types of movements mentioned in the question specifically align with the characteristics of mechanical designs. This fundamental understanding is important when differentiating between various types of meter technologies in practical applications.