Sensor & Product Development

Wide-Turndown Anti-Vibration Vortex Flow Meter

This vortex meter development addresses two separate field problems: changing operating flow and mechanical vibration that can overlap with the true vortex signal, especially near the lower end of the range.

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Problem and solution comparison for the Velomac anti-vibration vortex flowmeter — Wide-flow-range handling and digital vibration analysis are reviewed together.

Maximum turndown

1:70

Rated flow coverage

1%–100%

Measurement class

Class 0.5

Dynamic variation

Approx. 75% lower

Two Operating Challenges

Flow change and vibration need different responses

Changing flow range

Low-flow vortex signals can be small
One fixed cutoff can remove useful information
Higher flow shifts the expected vortex frequency

Pipeline vibration

Mechanical interference is often narrow-band
Motor and power-frequency harmonics can remain fixed
Vibration amplitude may exceed the real low-flow signal

Development Approach

Follow the process signal instead of one fixed filter

Adaptive filtering across changing flow conditions
Digital signal-feature analysis for persistent interference
Ten selectable anti-vibration modes
Wide-flow-range handling from 1% to 100% of rated flow
Site review based on both flow range and vibration source

Velomac wide-turndown anti-vibration vortex flowmeter — The product development combines wide range coverage with digital anti-vibration functions.

Test Setup

Apply flow and mechanical disturbance together

A representative program used the in-house airflow and vibration test system to compare the same meter configuration with digital signal-feature analysis disabled and enabled.

Approximately 1g three-axis acceleration
Approximately five minutes per recorded condition
Static test with no flow
Dynamic test at approximately 5 m/s

Velomac airflow and vibration test setup with vortex flowmeter — Real in-house setup used to apply airflow and mechanical disturbance.

Before and After

Recorded result with digital feature analysis enabled

Recorded dynamic change

Approx. 75% reduction

Measurement	Feature disabled	Feature enabled
Static vibration signal	33–51 Hz	0 Hz
Static flow output	False flow present	0.000 m³/h
Dynamic frequency range	185–189 Hz	185–186 Hz
Dynamic frequency spread	4 Hz	1 Hz
Instantaneous flow peak-to-peak variation	Approx. 0.20 m³/h	Approx. 0.05 m³/h

Image-Supported Validation

Static and dynamic screen records

The screen captures show the two feature states. Values shown are tied to the recorded test conditions.

Static vibration test with digital feature analysis disabled — Static, no flow: feature analysis disabled.

Static vibration test with digital feature analysis enabled — Static, no flow: feature analysis enabled.

Dynamic vibration test with digital feature analysis disabled — Dynamic flow: feature analysis disabled.

Dynamic vibration test with digital feature analysis enabled — Dynamic flow: feature analysis enabled.

Suitable Conditions

Information needed for a useful review

Minimum, normal and maximum flow
Medium, pressure and temperature
Pipe size and available straight run
Vibration source and approximate frequency or acceleration
Pipe supports, nearby pumps, compressors or motors

Related Developments

Connect the meter result to the test capability

Sensor & Product Development

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Keeps the piezoelectric element outside direct media contact while retaining the vortex signal.

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Testing & Calibration Systems

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Applies controlled airflow and mechanical vibration while recording the meter response.

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Vortex flowmeter installed on a chemical or pharmaceutical process utility line

Application Upgrade Projects

Smart Vortex Upgrade for Chemical and Pharmaceutical Processes

Reviews when a vortex meter can replace an orifice plate in chemical and pharmaceutical utility lines.

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Selection support

Share the flow range and vibration condition.

Send the minimum, normal and maximum flow together with the vibration source, pipe layout and operating conditions.

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