In a Venturi meter, which physical quantity is used to determine flow rate?

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Multiple Choice

In a Venturi meter, which physical quantity is used to determine flow rate?

Venturi meters infer flow rate from the pressure difference created by the constriction. As the fluid speeds up through the narrow throat, its static pressure drops. Measuring that differential pressure with a sensor and applying the appropriate equation (which uses the pipe areas and fluid density) yields the flow rate. Temperature, humidity, or volume aren’t the direct measurements used to determine flow in this device—the primary signal is the differential pressure.

Venturi meters infer flow rate from the pressure difference created by the constriction. As the fluid speeds up through the narrow throat, its static pressure drops. Measuring that differential pressure with a sensor and applying the appropriate equation (which uses the pipe areas and fluid density) yields the flow rate. Temperature, humidity, or volume aren’t the direct measurements used to determine flow in this device—the primary signal is the differential pressure.

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