HOW TO SELECT A FLOW METER


When selecting a flow meter, follow the steps below:
1Confirm the properties of the detection fluid
2Confirm the purpose of measurement and determine the detection method
3Confirm product specifications
4Consider cost
1First, 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
2Next, clarify the purpose of measurement. At this point, determine a selectable detection system along with properties such as accuracy and flow range
3Once the detection method has been determined, make a decision while confirming detailed model specifications.
4Finally, 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]

Ultrasonic 
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


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