Difference Between Different Types of Flow Meters

There are several types of flow meters available in the market. However, each flowmeter differs from the other depending on the size, accuracy, and what they measure. Many people find it quite confusing to know the difference between different types of flow meters.
If you have been wondering how to differentiate various types of flow meters, then you are at the right place. We are going to major in the most common flow meters and how they differ from each other. Let us start with the general comparison of various flow meters.

Some of the various types of flow meters include; turbine flow meters, positive displacement flow meters, orifice flow meters, magnetic flow meters, venturi flow meters, variable flow meters, vortex flow meters, Coriolis flow meters, etc.

Comparison between different flow meters.

To compare the flow meters, you need to know some specific features of every flow meter to analyze and make a general comparison. For instance, you need to see the variation on every pipe size. 
Also, consider knowing what flow meter is suitable for which type of application and other essential factors you need to consider while calculating the volume, mass, density, etc.

Let us now compare the turbine flow meters and positive displacement flow meters.

1. There’s usually indirect measurement in turbine flow meters, while the positive displacement flow meter has a direct one.
2. Turbine flow meters are usually affected by the viscosity of the fluid during the measurement. It is opposed to positive displacement flow meters, which are free from the effect of viscosity.
3. For a successful measurement, a turbine flow meter needs to have an upstream or downstream of straight lengths of pipe. 

The straight pipe run will ensure the smooth flow of the fluid, thus bringing out the exact measurements. However, in a positive displacement flow meter, you don’t need to have a straight length of pipes for a successful measure. 

4. Turbine flow meters have lower operating, investment, and maintenance costs than positive displacement flow meters, which have a higher operating, investment, and maintenance cost. 
You are required to regularly maintain the parts of the positive displacement flowmeter for a successful operating system.

5. A turbine flow meter has a small range that usually has a smaller size than a positive displacement flow meter. 
On the other hand, you will need a larger size in a positive displacement flow meter to achieve a specific flow rate range. It will, in turn, bring about correct values on your measurements.

Various flow meters also record a variation in temperature and pressure. It means that in some cases, you will notice an increase in the flow rate measurement due to the rising in temperature and pressure. And vice versa is always true.
Depending on your application, you need to weigh how a specific flow meter works to accomplish the flow rate measurement process. Your budget can also contribute to which flow meter you are choosing for your application.

Summing up

The comparison of different flow meters can help you choose the best flow meter for your application. It is because you’ll be able to know the main features available in the flow meters. You also need to know about what can affect the measurement process, like temperature and pressure.

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