HOW TO SELECT A FLOW METER

When selecting a flow meter, follow the steps below:

【1】Confirm the properties of the detection fluid
【2】Confirm the purpose of measurement and determine the detection method
【3】Confirm product specifications
【4】Consider cost

【1】First, it is necessary to confirm the properties of detection fluids.

Fluid types	Gas, Liquid, Vapor, etc.
Density	Can be calculated from fluid name, temperature and pressure
Viscosity	Required for liquids
Electrical conductivity	Required for electromagnetic type flow meters
Contaminants	Air bubbles, mixed-in foreign objects, slurry, etc.
Flow range	Minimum and maximum flow
Fluid temperature	Measured in response to the fluid
Fluid pressure	For pressure-resistance confirmation
Pressure loss	Measured as necessary

【2】Next, clarify the purpose of measurement. At this point, determine a selectable detection system along with properties such as accuracy and flow range

【3】Once the detection method has been determined, make a decision while confirming detailed model specifications.

【4】Finally, compare costs. Because removing a flow meter also takes time, you must make a decision that not only considers the unit price of the product, but also considers maintenance time after installation as well as the cost of set-up or troubleshooting. Generally when the product unit price is low, frequent maintenance or failure replacement may be required.

COMPARISON OF EACH FLOW METER DETECTION METHOD [REPRESENTATIVE EXAMPLE]

	Electromagnetic	Ultrasonic	Coriolis type	Karman vortex type
Liquid	Available	Available	Available	Available
Gas	N/A	Available	Conditional	Available
Vapor	N/A	Conditional	N/A	Available
High temperature support	Available	Available	Available	Available
Micro flow	Conditional	N/A	Available	N/A
Medium flow	Available	Conditional	Available	Available
Large flow	Available	Available	Conditional	Available
Viscosity	Available	Available	Conditional	N/A
Slurry	Available	Available	Available	Conditional
Oil	N/A	Available	Available	N/A
Accuracy	Available	Available	Available	Available
Maintainability	Available	Available	Available	Available
Pressure loss	Available	Available	N/A	Conditional
Air bubbles	Conditional	N/A	Available	Conditional

insertion flow meter

 

flow meter