Understanding Radiation Measurement with Flow Meters

Radiation Measurement | Flowmetrics


Generally, radiation is constantly emitted for various reasons and in different ways. Even with its benefits, it can be quite dangerous. For this reason, it is critical that radiation levels be properly measured and maintained. There are a few different tools that may be used for radiation measurement, which can be helpful in many situations. Check out these facts on why radiation measurement is necessary and the different tools that can be used to help.

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Video: Basics of Flow Meters

This video covers basic flow meter fundamentals including types of flow meters and the main considerations and challenges in selecting a flow meter.

Flow meters are used to measure the rate of flow of liquids or gases, just like electric meters measure the amount of electricity consumed. However, unlike electric meters, which are either electro-mechanical or electronic meters, there are many variants in flow-meters, all with different concepts on how the flow of fluid is measured, with some even customized to measure special fluids.


For more about flow meters visit Electronics Circuit Colle

Types of Fluid Flow Meters

Types of Fluid Flow Meters


Having options is always a great thing. There are many different types of flow meters on the market. The common principles of flow meters are differential pressure, velocity, positive displacement, mass, and open channel. Along with the principles the different types of meters are orifices, venturies, nozzles, rotameters, pitot tubes, calorimetrics, turbine, vortex, electromagnetic, doppler, ultrasonic, thermal and coriolis.

Because there are so many different types, making sure you have the right one for the project is imperative. Each meter does different things and reacts differently depending on what you need it for. The basic goal is to get the most accurate reading. 

For more information on what all these flow meters do visit Engineering Toolbox HERE


The History of Variable Area Flow Meters

Variable Area Flow Meters | Flowmetrics


Exploring the History and Designs for Variable Area Flow Meters

Variable area flow meters are devices designed to measure the flow of gases or liquids through pipelines and similar enclosed structures. Over time, different types of VA flow meters have been developed, usually in response to some specific need. Here is some background on the meters and how the various designs came to pass. 


The Beginning

Karl Kueppers is credited with developing the first true variable area flow meter. Designed and launched in 1908, the device was patented in Germany that same year. The initial function had to do with measuring water flow. 

Felix Meyer was among the first to recognize the significance of Kueppers’ work and implemented the process for offering the meter for sale. In 1909, the firm of Duetsche Rotawerke was created in Aachen Germany. It didn’t take long for the new device to capture attention in Europe, the United Kingdom, and other areas.

In the first decades of the 20th century, Kueppers continued to refine the basic design. Specifically, he enhanced the shape of the float used in the glass tubing so that the results of the water flow testing were more accurate. 

During this period, the Kueppers product became known as a rotamesser, which can be roughly translated as a rotation measurer.


Here Comes the Rotameter

Prior to the Second World War, a version of the VA flow meter appeared in the United Kingdom. Still designed for measuring liquids, the newly dubbed Rotameter and registered by the UK firm of GEC Elliot. For years, the meter was manufactured by a division known as Rotameter Inc and based in the Croydon area. 

During the 1970’s the manufacturing operation was moved to Crawley, where it is still in operation. Over the years, ownership of the operation has changed as acquisitions and buyouts have taken place. As of 2016, the patent and the registration for the rotameter are held by the Yokogawa Electric Corporation.


Variable Area Flow Meters for Natural Gas Measurement

While originally designed for liquid measuring, further developments too place from the middle of the 20th century and continue today. Some models make use of heavy-duty plastic tubing rather than the traditional glass. The shape and materials used after 1950 for the floats have also changed. Designs that make it easier to measure the flow of gas or steam through a system serve the same basic purpose as the originals, making it easier to determine if the flow is efficient, or if some factor is impeding the progress of the gas. 

While the meters are still relatively simplistic in design, contemporary meters sometimes include equipment that makes it possible to monitor and download results to a computer program. This helps to limit the potential for human error in reading the test results. 

This more modern approach also aids in the collating of data over a specified period of time. For example, if there is the need to compare test results over the last six months and assess what differences have occurred after structural changes or other adjustments are made, accessing the history is quick and efficient. 

While variable area flow meters may be inexpensive to produce, they have saved a great deal of time and money in a number of settings. Today, the meters are no longer used exclusively in manufacturing settings. The meters are also used in managing municipal water systems, laboratories, and mining operations. There is no doubt that additional uses for the meter will come about as the technology continues to develop.


For more information on Flow Meters and other flow related products visit Flowmetrics HERE

More on the history of flow meters visit Flow Control HERE

Understanding Turbine Flow Meters

Turbine flow meters are quite an interesting mechanism. The way they measure flow based on velocity is fascinating. This video is a great understanding of what and how turbine flow meters do what they do. The descriptions and graphics really tell you what you need to know about the inner workings. 

For more informative videos visit McGraw Hill HERE

Top Tips for Flowmeter Selection

flow meter selection


The flowmeter industry is ever growing and the technology is evolving. There are many questions and factors that come into play with your selection of the right meter.  A broad range of factors can influence selection, of which cost is just one. Selecting the proper flowmeter is imperative to achieving the most accurate measurements and continuing success of your equipment.

Do you need a flowmeter?

Don’t choose based on cost

Know exactly what your flow is

Opt for the widest turndown

Pay attention to the installation

Pick the best meter that will offer the best accuracy

Use the same supplier for all flow related equipment


For more info on selecting the proper meter go to ABB by clicking HERE

Flow Meter Measurement Errors

Flow Measurement Errors


Flow meters create a solid foundation of tracking fuel, water, steam, gas, etc. Certain flow meters are able to enhance the quality in specific industries like manufacturing, sewage, pharmaceutical and many more. Accuracy, versatility and suitability for direct mass flow data acquisition are advantages which frequently make Coriolis flow meters the solution of choice. With measurement, you want to make sure your flow meter is accurate and precise to get the right reading.

One thing that you should take note of is when a brochure lists a measurement error of <0.1 percent, this refers to digital devices operating under reference conditions. The measurement error in these situations is actually around one percent. The error percentages can be based on the measurement value or the measurement range or instrument range, or they can be listed as an absolute μA value.


For more on Flow Meters and Measurement check out Process Worldwide HERE






Meters Used In Custody Transfers

Meters Custody Transfers


One of the most important applications for flow measurement is custody transfer. There are many different meters used in custody transfers and in particularly positive displacement flow meters are highly regarded as a standard.

Using a positive displacement meter in custody transfers are highly accurate in the transfer of commercial and industrial water, as well as natural gas and other liquids. PD meters also are great for measuring low flows and high viscous flows. Another great reason for using a PD meter in custody transfers is that they capture the flow in a container known as volume, making speed of flow a non issue.

Other meters used in custody transfers are:

Differential Pressure Flow Meters

Turbine Flow Meters

Coriolis Flow Meters

Ultrasonic Flow Meters

Positive Displacement Flow Meters


For more info on these meters and their uses visit Flow Tech HERE







Flow Meter: Choose the Right One for Your Process

Flow MeterThere are many factors that you will want to consider when choosing which flow meter will be best for your process. 

Some of the factors that you will want to consider, according to Marcus P. Davis’s article on pumpsandsystems.com, are the application environment, the fluid type, accuracy requirements, and also the parameters at which you will be operating. The article further informs that the temperature, pressure, and flow rate will depend on your operating parameters. It is important to take these factors into consideration to ensure that you get a flow meter that will work best for you.

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