Flow

MEASURING PRINCIPLE

Vortex shedding flow

A bluff body sheds vortices at a frequency proportional to velocity; sensors count the vortices.

PRINCIPLE · LIVE SIGNAL13.9mA

HOW IT WORKS

See the principle in action

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Vortex shedding flow

FLOW
200 m³/h

OUTPUT
12.0 mA

ADJUST FLOW

A bluff body in the stream sheds alternating vortices.
The shedding frequency rises in proportion to velocity.
A sensor counts the vortices and converts frequency to flow.

AT A GLANCE

Strengths and limits

STRENGTHS

Robust for steam and gas, wide temperature range

LIMITS

Needs minimum Reynolds number; poor at low flow

INSTRUMENTS

Instruments using this principle

FL-410

Flow

Vortex Flowmeter

Rugged volumetric flow for steam, gas and liquids.

ACCURACY

±1 % of reading

PROTECTION

IP67

APPLICATIONS

Where this principle is the answer

APPLICATION

Boiler feedwater and steam flow

High temperature and pressure demand a robust sensor with no moving parts and a verified energy balance.

Read the application →

Articles and downloads

Application note

Metering steam in a plant network

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FAQ

Common questions

RFQ

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