The Art of Mastering Equipment

Choosing the Right Flow Meter

The job of selecting the right flow meter for a highly specific operation can be an overwhelming one considering the wide range of options you have right now. This is more intensified due to the fact that various factors should also be considered in order to come up with the right choice. Contrary to what most so-called experts say, it never is just about the cost.

First things first, you need to figure out if you really need a flow meter. There are several applications in which the equipment is required, but it also does not mean you need them all the time. One good example is what you really need is to find out the rate at which liquid or gas is moving through a particular pipeline. If it’s the kind of application you intend to do, all you need is a simple flow indicator that likewise can be purchased from your flow meter supplier. Buying the flow indicator is more sensible because it’ll cost a lot less than the basic flow meter.

Next tip is to not buy the cheapest flow meter out there, because more likely than not, you will be regretting that decision later on. We’re not saying that the most affordable ones are defective or broken for that matter; it’s just that you never can expect them to last long and that’s really not a good thing considering the application you will be using it for. Usually, those low-priced varieties don’t come with technical support or backup from the supplier.
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Meanwhile, before you start looking at your options, you first must particularly know your flow. In this regard, you need to be completely aware that each kind of liquid or gas will have a different behavior when flowing through a pipeline. The difference in behavior is literally caused by a process called viscosity, which is generally defined as the measurement as to how much fluid will resist the flow. Because of this resistance, the velocity of the flow is affected.
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It is best to purchase a flow meter that comes with the widest turndown. This is very important because there’s really no telling in advance as to the specific range of flows that need to be measured. By picking a flow meter with the widest turndown, you will be able to get the assurance that all the anticipated flow variations will be covered.

Finally, choose the flow meter that gives you the best accuracy possible for the specific application. If you happen to have the lowest uncertainty when it comes to measurement, it only means that the best option for you is a positive displacement meter. Electromagnetic varieties are best for the widest flow range while turbine meters are used primarily for the highest short-term repeatability.