Exploring The Various Classifications Of Ultrasonic Flow Meters

May 20, 2015

Ultrasonic flow meters are devices that are essential in many manufacturing industries. They are meant to be used to control the rate of flow of all types of liquids and sometimes even gases. Some of the applications for them include when doing packaging, in which case they can be used to package accurate volumes of fluid within a particular container. If you are interested in buying an ultrasonic flow meter for any reason, it would be wise to have a basic working knowledge of the various technologies that are used to manufacture them. This makes it much easier for you to determine which category to buy for your own needs. There are many different ways to classify such devices. Some of these groups include:

Based on the principle of their operation

You can choose the flow meter based on the physical properties they measure when working. There are two broad categories of flow meters in this group: the transit flow meters and the Doppler ones. The former measure the time difference between two points in a column of flow of a fluid, and is usually used to measure flow in liquids that have few or no particles. The Doppler meter works by depending on the Doppler Effect. They are usually less accurate than the transit time meters, and are cheaper as well. However, they are more useful for measuring flow rates in fluids with many particles.

Categorization based on portability

When you are shopping for a flow meter, you might also need to take into account how portable you need it to be. The handheld flow meters are usually very effective for flow survey. However, if you are interested in using the flow meter for process control such as in a plant, the wall mounted or non-portable ones would be more practical. They are usually cheaper than the handheld varieties.

Based on the design of the transducer

The transducer is the part of the flow meter that takes the readings from the sensors and converts them into readings you can make sense of. There are two main types of transducers: the clamp-on and the wetted type. The former are installed on the surface of the item that has the water flowing through it, such as a water pipe. The major benefit of this type of transducer is the fact that it’s easy to install. The wetted type needs to be in contact with the fluid being measured, which makes it a bit more complicated to install.

Another way to categorize the transducer technology is whether it’s a single-path or a multi-path transducer. A single path transducer uses one ultrasonic path to determine the flow rate. A multi-path one will generate multiple sound waves which can then measure the velocity of water in different areas within the same pipe. It is usually more accurate and suitable for larger pipes.

These are just some of the ways of categorizing the different types of ultrasonic flow meters. When you are shopping for one, it’s always a good idea to be very keen about the environment in which the device will be used, so that you can then pick a flow meter that will be most suitable to meet your needs.

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