How Do Flow Meters Work - Flowmeter Types And Operation

View PDF | Print View
by: AdrianFletcher
Total views: 32
Word Count: 495

Liquids and gases passing through a tube or pipe often need to be measured to determine the rate at which they are moving. They are generally measured in terms of their volume or their mass. A volumetric flow rate reading is meters to the power of three divided by time. The mass flow rate is kg's divided by time.

There is a diverse range of uses for flow meters. They have applications for individuals, a common one being to help people with asthma. A peak flow meter measures the lung capacity when someone exhales. This can help to predict an imminent asthma attack.

Other than that, flow meters are used in many industries, like the food processing industry, water management, semi conductor fabrication and many others. This article will give a brief overview of how flow meters work.

Flow meters are generally classified by the type of flow rate that they measure or by the fundamental principle that governs their operation. Mass flow meters measure the mass flow rate but there are many types of mass flow meters, each having a different method to arrive at this measurement.

The Coriolis flow meter in an example of the principle determining the name. The Coriolis effect is the force that a liquid experiences in a circular motion. In the flow meter, vibrating pipes cause the liquid to move in a circular motion. If the wave motion of the vibrating pipes is known before the liquid passes through the pipes then the flow rate of the liquid can be determined.

Ultrasonic and Doppler shift flow meters also use the changes caused to sound waves to correlate a rate of flow for the medium passing through the meter.

For an ultrasonic flow meter, flow rate is measured by contrasting the measurements of two ultrasonic waves. These two waves are set off at the same time as each other but from different directions.

The transmitters also act as a receiver of the wave sent by the other transmitter. One pulse of sound is sent in the direction of the flow and the other is sent against the flow.

If various constants are known about the metal of the pipe and the liquid or gas passing through the pipe, a rate of flow can be derived from the time it takes each sound wave to reach the receiver.

Doppler shift flow meters also use waves to determine the flow rate. They work on the principle that a sound wave that bounces off a moving particle in the medium has it's frequency and amplitude changed. By determining the change in these dimensions, the flow rate of the medium can be determined.

A variable area flow meter is a more standard type of meter. It uses a float that is moved by the force of the substance passing through a calibrated tube.

By taking the reading from the calibrated tube an indication of the flow rate can be determined. This is the principle of the peak flow meter used for lung capacity and asthma.

About the Author

Learn more about how do flow meters work and information on peak flow meters at http://www.flowmetermatters.com.

---

HTML Code For Copy & Paste

The following code can be copied and pasted into your web page to ensure all links are properly maintained.

<h1>How Do Flow Meters Work - Flowmeter Types And Operation</h1> <p> Liquids and gases passing through a tube or pipe often need to be measured to determine the rate at which they are moving. They are generally measured in terms of their volume or their mass. A volumetric flow rate reading is meters to the power of three divided by time. The mass flow rate is kg's divided by time.<br /><br />There is a diverse range of uses for flow meters. They have applications for individuals, a common one being to help people with asthma. A peak flow meter measures the lung capacity when someone exhales. This can help to predict an imminent asthma attack.<br /><br />Other than that, flow meters are used in many industries, like the food processing industry, water management, semi conductor fabrication and many others. This article will give a brief overview of how flow meters work.<br /><br />Flow meters are generally classified by the type of flow rate that they measure or by the fundamental principle that governs their operation. Mass flow meters measure the mass flow rate but there are many types of mass flow meters, each having a different method to arrive at this measurement.<br /><br />The Coriolis flow meter in an example of the principle determining the name. The Coriolis effect is the force that a liquid experiences in a circular motion. In the flow meter, vibrating pipes cause the liquid to move in a circular motion. If the wave motion of the vibrating pipes is known before the liquid passes through the pipes then the flow rate of the liquid can be determined.<br /><br />Ultrasonic and Doppler shift flow meters also use the changes caused to sound waves to correlate a rate of flow for the medium passing through the meter.<br /><br />For an ultrasonic flow meter, flow rate is measured by contrasting the measurements of two ultrasonic waves. These two waves are set off at the same time as each other but from different directions.<br /><br />The transmitters also act as a receiver of the wave sent by the other transmitter. One pulse of sound is sent in the direction of the flow and the other is sent against the flow.<br /><br />If various constants are known about the metal of the pipe and the liquid or gas passing through the pipe, a rate of flow can be derived from the time it takes each sound wave to reach the receiver.<br /><br />Doppler shift flow meters also use waves to determine the flow rate. They work on the principle that a sound wave that bounces off a moving particle in the medium has it's frequency and amplitude changed. By determining the change in these dimensions, the flow rate of the medium can be determined.<br /><br />A variable area flow meter is a more standard type of meter. It uses a float that is moved by the force of the substance passing through a calibrated tube.<br /><br />By taking the reading from the calibrated tube an indication of the flow rate can be determined. This is the principle of the peak flow meter used for lung capacity and asthma. <h2>About the Author</h2> Learn more about <a href="http://www.flowmetermatters.com/">how do flow meters work</a> and information on peak flow meters at <a href="http://www.flowmetermatters.com/">http://www.flowmetermatters.com</a>. </p>

---

Rating: Not yet rated

--Choose-- 0 1 2 3 4 5

Comments

No comments posted.

Add Comment

You do not have permission to comment. If you log in, you may be able to comment.