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Coriolis Flowmeters

What is a Coriolis Mass Flow Meter?

These meters are known to be extremely accurate and repeatable under a wide range of conditions and are a common sight in industrial applications where precision control is required. The Coriolis principle enables direct measurement of density and mass flow.

How do Coriolis Mass Flow Meters work?

Coriolis flow meters work on the principle that the inertia created by fluid flowing through an oscillating tube causes the tube to twist in proportion to mass flowrate. Common Coriolis flow meters have two tubes. Measuring the sine waves allows us to directly measure mass flow. The measurement is independent of viscosity which means that users do not require an input from an additional device installed in the line (viscometers)

It is understandable that with this kind of accuracy and repeatability, the Coriolis meter has become a standard in the industry.

Which kind of industries are using Coriolis Meters?

Nowadays, with its wide acceptance, the Coriolis meter is being used widely in the food industry, chemical plants and oil and gas applications where custody transfer accuracy is a requirement. Other applications can be found in the petroleum, petrochemical, pharmaceutical plants and many more.

What types of applications are common for the Coriolis meter?

  • Batch Control
  • Blending
  • Process Control
  • Filling
  • Dosing
  • Loading and Unloading
  • Process Gas Measurement
The Measurement Principle

Each mass flow meter has two measuring tubes. The oscillating system is driven by two controlled electromagnetic excitation coils. As liquids or gases flow through the oscillating omega tubes, the Coriolis force is created and causes a slight deflection of the two measuring tubes from their original shape. The opposing tubes are referenced to each other and the changes in deflection are proportional to the mass flow rate. In practice, the referencing is done by attaching small pickup coils that generate sinusoidal voltages. The degree of deviation of the phase shift is directly proportional to the mass flow.

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