Rõhuerinevusvoolumõõtur

Rõhuerinevusvoolumõõtur, also known as a differential pressure flow meter, is an instrument used to measure the flow rate of a fluid (liquid or gas) in a pipe. It operates on the principle that as a fluid flows through a constriction, its velocity increases, and consequently, its pressure decreases. This phenomenon is described by Bernoulli's principle.

The device typically consists of a primary flow element, such as an orifice plate, venturi tube, or flow nozzle, which creates a constriction in the pipeline. As the fluid passes through this constriction, a pressure drop occurs. A differential pressure transmitter is then connected across the primary element to measure this pressure difference. This transmitter converts the pressure difference into an electrical signal that is proportional to the flow rate.

The magnitude of the pressure difference is directly related to the square of the flow rate. Therefore, by measuring this difference, the flow rate can be accurately calculated using established formulas that take into account the properties of the fluid and the geometry of the primary element. Rõhuerinevusvoolumõõturid are widely used in various industrial applications, including water treatment, chemical processing, and power generation, due to their reliability, relatively low cost, and ability to handle a wide range of flow conditions. Calibration and maintenance are important to ensure accurate measurements over time.