# What is an Annubar flow meter?

## What is an Annubar flow meter?

The Annubar primary flow element is a device used to measure the flow of a liquid, gas or steam fluid that flows through a pipe. It enables flow measurement by creating a differential pressure (DP) that is proportional to the square of the velocity of the fluid in the pipe, in accordance with Bernoulli’s theorem.

## What is Coriolis system?

A Coriolis meter is based on the principles of motion mechanics. When the process fluid enters the sensor, it is split. During operation, a drive coil stimulates the tubes to oscillate in opposition at the natural resonant frequency. As the tubes oscillate, the voltage generated from each pickoff creates a sine wave.

What is Q in open channel flow?

Q = volumetric water flow rate passing through the stretch of channel, ft3/sec (m3/s for S.I.)

How is channel flow measured?

The common method of measuring flow through an open channel is to measure the height or HEAD of the liquid as it passes over an obstruction (a flume or weir) in the channel. Using ultrasonic level technology, Open channel flow meters include a non-contacting sensor mounted above the flume or weir.

### What is an Annubar primary flow element?

The Annubar primary flow element is a device used to measure the flow of a liquid, gas or steam fluid that flows through a pipe. It enables flow measurement by creating a differential pressure (DP) that is proportional to the square of the velocity of the fluid in the pipe, in accordance with Bernoulli’s theorem.

### What is the principle of operation of Annubar?

Principle of Operation. The Annubar primary flow element is a device used to measure the flow of a liquid, gas or steam fluid that flows through a pipe. It enables flow measurement by creating a differential pressure (DP) that is proportional to the square of the velocity of the fluid in the pipe, in accordance with Bernoulli’s theorem.

Why choose Rosemount Annubar flow meters?

Rosemount Annubar flow meters combine the industry’s best differential pressure and multivariable transmitters with the leading averaging pitot tube technology to create the most accurate and reliable solution available. Elimination of Impulse Lines Reduces Maintenance Costs

What is the flow equation for Rosemount Annubar?

The flow equation relates the DP induced across a primary element to the velocity of the fluid in the pipe. As with other differential-pressure flowmeters, Rosemount Annubar equations are based on the Bernoulli equation: Equation 4-1 For incompressible fluids 1= 2.