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A Closer Look At The Liquid Flow Meter
Posted: Dec 11, 2013
In simple terms, Flow meter is a device which is used for measuring the flow rate or the volume of moving liquids in different types of conduits. Different types of flow meters are used in the industrial sector based on the application and specific requirement. Broadly speaking, the flow meters can categorised in to four types which are - Mechanical type, Electrical type, Inferential type and others. These categories can be further sub-divided into:-
- Mechanical type – Some types of flow meters which fall under this category include mass flow meters and positive displacement meters.
- Electrical type – This category includes types such as Ultrasonic flow meter, Laser doppler Anemometers and Electromagnetic flow meter.
- Inferential type – Turbine flow meter, target flow meters and Rotameters are some examples of meters which are classified under this category.
- Others – Some other types of flow meters include Purge flow regulators, Vortex shedding flow meters and Cross-correlation flow meters.
Choosing the right kind of liquid flow meter is essential for the ensuring that the meter offers excellent performance. If the meter is not matched properly to the piping system, then it may affect the accuracy of the readings eventually. Some of the considerations that matter when selecting a flow meter for a pipe system include:
- Before selecting any particular type of flow meter, it is essential to determine the lowest flow rate & the highest flow rate required in the system. The kind of meter being chosen should be capable of efficiently measuring both the lowest and the highest rate.
- Another factor that matters when selecting the right kind of liquid flow meter is the size of the pipe. The diameter of the pipe should not be more than that required in the application.
- An important factor to keep in mind when choosing the right type of meter is regarding the accuracy. Generally, an accuracy level of ± 5% of the total volume of water being pumped into the system is considered ideal.
- Ideally the flow meter being chosen should be capable of measuring both – the volume of water being pumped in a minute and the total volume pumped over a period of time.
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