Coriolis Flow Meter and Mass Meters

Price range: $ 1,510.00 through $ 67,690.00

A Coriolis flow meter is a cutting-edge device used for precise measurement of fluid flow and density.  It operates based on the Coriolis effect, where the flow of fluid through a vibrating tube creates a change in the tube’s vibration frequency.  This change is directly proportional to the mass flow rate of the fluid, allowing for highly accurate measurement of both flow rate and density.

The design of a Coriolis flow meter typically features one or more vibrating tubes through which the fluid passes.  As the fluid flows, it affects the vibration of the tubes in a manner that can be precisely measured and analyzed.  This results in a highly accurate determination of the mass flow rate and density, which are crucial for various applications in industries such as chemical processing, oil and gas, pharmaceuticals, and food and beverage.

One of the primary advantages of Coriolis flow meters is their ability to provide direct mass flow measurement, eliminating the need for additional pressure or temperature compensation.  They are also known for their high accuracy, reliability, and ability to handle a wide range of fluid types, including those with varying viscosities and temperatures.

Additionally, Coriolis flow meters often come equipped with advanced diagnostics and communication capabilities, enabling real-time monitoring and integration with control systems.  This makes them an invaluable tool for optimizing processes, ensuring product quality, and enhancing overall operational efficiency in industrial settings.

Description

Coriolis Flow MetersThe Coriolis Flow Meter and Mass Meters are instruments used to measure the mass flow rate of a fluid.  They operate on the principle of Coriolis force, which is a force that acts on a mass moving in a rotating system.  A Coriolis flow meter consists of a U-shaped tube that is oscillated at a specific frequency.  When a fluid flows through the tube, it causes a twisting motion in the tube due to the Coriolis force acting on the fluid.  This twisting motion is proportional to the mass flow rate of the fluid.  Also, it is measured by sensors placed at the inlet and outlet of the tube.

The advantages of Coriolis Flow Meter and Mass Meters include their ability to measure the mass flow rate directly, their high accuracy, and their ability to handle a wide range of fluid types and viscosities.  Industries commonly use them, including oil and gas, chemicals, food and beverage, and pharmaceuticals.

Why is the Expensive

However, they are generally more expensive than other types of flow meters, and they may not be suitable for applications where the fluid contains solid particles or where the flow rate is very low.  Additionally, they may require periodic calibration to maintain their accuracy.  The Mass Flow Meter does not measure the volume per unit time (e.g., cubic meters per second) passing through the device; it measures the mass per unit time (e.g., kilograms per second) flowing through the device.

The Coriolis Flow Meter and Mass Meters can detect the flow of all liquids and gases.  The food and chemical industries primarily use this.

Technical Side of Coriolis Flow Meters

Volumetric:

You calculate the volumetric flow rate by dividing the mass flow rate by the fluid density.   If the density is constant, then the relationship is simple.  If the fluid has varying densities, then the relationship is not simple.

Density:

The density of the fluid may change with temperature, pressure, or composition, for example.  Also, the fluid may be a combination of phases such as a fluid with entrained bubbles.  The Actual density is due to the dependency of sound velocity on the controlled liquid concentration.

What happens to the Fluid?

Fluid is being pumped through the Coriolis flow meter or mass flow meter.  When there is mass flow, the tube twists slightly.  The arm through which fluid flows away from the axis of rotation must exert a force on the fluid, to increase its angular momentum, so it bends backward.

Curved Mass Flow Meters:

Engineers design curved tube mass flow meters to lead the fluid through two parallel tubes.  The actual frequency of the vibration depends on the size of the mass flow meter.  The frequency has a range from 80 to 1000 Hz.

No Flow:

When no fluid is flowing on Coriolis flow meters, the motion of the two tubes is symmetrical, as shown in the left animation.

What happens during mass flow:

  • Some twisting of the tubes
  • The arm carrying the flow away from the axis of rotation must exert a force on the fluid.  You use this to accelerate the flowing mass to match the vibrating speed of the tubes.   This occurs at the outside (an increase of absolute angular momentum), so it is lagging behind the overall vibration.

The arm that pushes the fluid back towards the axis of movement must exert a force on the fluid.  You use this to decrease the fluid’s absolute angular speed.  Also, the inlet arm and the outlet arm vibrate with the same frequency as the overall vibration, but when there is mass flow the two vibrations are out of sync: the inlet arm is behind, and the outlet arm is ahead.  The two vibrations are shifted in phase concerning each other.  It is the degree of phase shift is a measure of the amount of mass that is flowing through the tubes.

Coriolis Flow Meter and Mass Meters Economics:

These mass flow meters provide short payback periods on applications where measurement accuracy lowers production costs.  You can achieve a short payback when you need to take multiple measurements, including density, temperature, and pressure.  On the other hand, they may not be competitive when used in simple flow measurement applications.  Where volumetric sensors are sufficient and where repeatability is more important than precision.  Other types like Turbine, Electromagnetic, and Ultrasonic, and Vortex may be the preferred choice.

Coriolis mass flow meters can detect the flow of all liquids and gases.  This type of detection is perfect for the food and chemical industry.  The reason is that they are the best choice for an accurate flow meter.

If the Coriolis Flow Meter does not meet your application requirements pls look at another type of flow meter below

Turbine Flow Meter

Variable Area Flow Meter

Ultrasonic Flow Meter

Electromagnetic Flow Meter

You may also like