Photonics Dictionary


A flowmeter is a device used to measure the flow rate or quantity of a fluid passing through a particular point in a system. It works by sensing the velocity of the fluid passing through it and converting that velocity into an equivalent flow rate. Flowmeters are essential in various industries, including manufacturing, energy, pharmaceuticals, water treatment, and more, where monitoring and controlling fluid flow is crucial for efficiency, safety, and compliance.

There are various types of flowmeters available, each with its own principles of operation and suitable applications. Some common types include:

Differential pressure flowmeters: These measure the pressure drop across a constriction in the flow path and use this information to calculate the flow rate.

Turbine flowmeters: They use a spinning turbine placed in the fluid flow, and the rate of rotation is proportional to the velocity of the fluid.

Ultrasonic flowmeters: These employ ultrasonic waves to measure the velocity of the fluid and calculate the flow rate.

Electromagnetic flowmeters: They utilize Faraday's law of electromagnetic induction to measure the velocity of conductive fluids.

Coriolis flowmeters: These measure the mass flow rate directly by detecting the Coriolis effect induced by the flowing fluid.

Thermal mass flowmeters: They measure the rate of heat transfer from a heated element to the flowing fluid.

Flowmeters are selected based on factors such as the type of fluid being measured, the required accuracy, the flow range, and the environmental conditions of the application. They play a crucial role in process control, quality assurance, and resource management in various industrial processes.
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