Advantages of Different Kinds of Flow Meters

Advantages of Electromagnetic Flow meters:

Unobstructed flow passage without projecting parts

No moving parts

No additional pressure drop

Essentially flow profile insensitive, only short inlet and outlet sections required

Unaffected by changes in temperature, density, viscosity, concentration and electrical conductivity

Favorable choice of materials for chemically aggressive or abrasive measuring media

Unaffected by contamination and deposits

Especially suitable for hydraulic solids transport

Linear relationship between flow rate and measured variable

Operates in both flow directions (forward and reverse)

Measuring range setting can be optimized

Low maintenance, but still easy to maintain


Advantages of Ultrasonic Flow meters:

Unobstructed flow passage

No moving parts

No additional pressure drop

Favorable choice of materials for chemically aggressive liquids

Linear relationship between flow rate and measured variable

Low maintenance

Operates in both flow directions (forward and reverse)

Transit time meters unaffected by temperature, density and concentration

Later installation in existing pipe possible with individual elements, but onsite calibration required


Advantages of Turbine Flow Meters:

No external power supply for Rotating vane and Woltman meters

Turbine flow meters suitable for cryogenic liquids

Turbine flow meters usable at extreme temperatures and pressures

No moving parts

Rugged construction

Suitable for liquids, gases and steam

Easily sterilized

Unaffected by pressure, temperature and density changes

Linear relationship between flow rate and measured value


Advantages of Variable Area Flow meters:

Inexpensive

No external power supply required for local indication

Suitable for liquids, gases and steam

No inlet and outlet sections required

Simple meter design, therefore easy to install and maintain

Indication also with opaque liquids

Metal cone meter with transmitter

Metal cone meter can be sterilized, CIP tested


Advantages of Coriolis Mass Flow meters:

True mass flow measurement

Additional temperature and density measurements

Very high accuracy for mass flow measurements

Highly accurate density measurement

Unaffected by pressure, temperature and viscosity

No inlet and outlet sections required

Operates in both flow directions (forward and reverse)

Measuring range settings can be optimized for flow rate and density

Self-draining


Advantages of Thermal Mass Flow meters:

Direct gas mass flow measurement

No pressure and temperature compensation required

Very low pressure drop

High measuring accuracy

Large span

No moving parts

Rugged construction

Short response time

Easily sterilized


Advantages of Differential Pressure Flow meters:

Universally suitable for liquids, gases and steam

Also usable in extreme situations, e.g. viscosity, due to variety of versions

Calculations possible for unusual situations

Suitable for extreme temperatures and pressures

Range changes possible

Low pressure drop for nozzles




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