Venturi Meter

A Venturi meter is a type of flow meter used to measure the flow rate of a fluid, either liquid or gas, in a pipe or conduit. It is classified under the supply class "Liquid And Gas Flow, Liquid Level, And Mechanical Motion Measuring Instruments" in the supply group "Instruments And Laboratory Equipment".

The Venturi meter consists of a converging section, a throat, and a diverging section. The fluid flows through the converging section, which narrows down the pipe's diameter, causing the fluid's velocity to increase. At the throat, the fluid reaches its maximum velocity and minimum pressure. Finally, the fluid flows through the diverging section, which gradually widens the pipe's diameter, causing the fluid's velocity to decrease and the pressure to recover.

The flow rate is determined by measuring the pressure difference between the throat and the inlet of the Venturi meter. This pressure difference is directly proportional to the flow rate according to Bernoulli's principle.

Venturi meters are commonly used in various industries, including water supply systems, oil and gas pipelines, and HVAC systems, to accurately measure the flow rate of fluids. They are known for their accuracy, reliability, and low pressure drop, making them a popular choice for flow measurement applications.