Yokogawa’s digitalYEWFLO Classic Vortex Flow Meter includes spectral signal processing (SSP) to provide enhanced vibration immunity and optimum, stable flow measurements. Even under fluctuating flow rate conditions, SSP outputs only the appropriate vortex frequencies with no manual adjustments needed.

Our classic type vortex flow meter features:

  • High accuracy:
    • +/- 0.75% of reading (liquid)
    • +/- 1% of reading (gas and steam)
  • Remote electronics housing
  • Advanced self-diagnostics
  • Replaceable shedder bar
  • High safety
  • Reduced maintenance and TCO

Find your DY model.

Our Classic digitalYEWFLO vortex flow meters are available in a number of different sizes ranging from 1/2-inch to 16-inch. Available with wafer style or flanged style (ANSI Class 150 to ANSI Class 900), digitalYEWFLO has the size and style you need for your process.


Digital Yewflo Vortex Flowmeter


Spectral Signal Processing (SSP)

In the past, some process conditions required manual adjustment to compensate for piping vibration noise. But, Yokogawa's digitalYEWFLO Spectral Signal Processing (SSP) analyzes the detected frequency and allows only vortex frequencies to pass through the segmented band-pass-filter, thereby accurately identifying and eliminating noise. The SSP function only outputs the appropriate vortex frequencies, even under fluctuating flow rate conditions.


Digital Yewflo Vortex Flowmeter


Industry Standard Communication Protocols

Digital Yewflo Vortex Flowmeter

Yokogawa digitalYEWFLO has the standard communication protocols used. Featuring BRAIN protocol, HART 5 protocol, HART 7 protocol, or FOUNDATION Fieldbus, the digitalYEWFLO can integrate quickly into your existing system.


Advanced Self-diagnostics

The digitalYEWFLO series vortex flow meter provides diagnostic messages on high vibration environments, excessive flow fluctuations, and clogging or plugging in the area around the shedder bar. Analysis of the process allows true condition-based maintenance.

Replaceable Shedder Bar

If obstructions are present, Yokogawa’s unique design of the shedder bar allows the operator to replace it without removing the meter, minimizing downtime. 

Remote Electronics Housing

Remote electronics allows you to locate the indicator away from the process measurement point and to a more convenient visible area.

The picture to the left shows a Stainless Steel housing. The SS housing is an available option on all Yokogawa digitalYEWFLO Vortex Flow Meters.

Digital Yewflo Vortex Flowmeter

Reduced Maintenance and Total Cost of Ownership

Vortex Flowmeter calibration and advanced pre-delivery programming are included, so customers can easily integrate the vortex flow meter into their system with minimal downtime.

How our vortex flow meters reduce costs:

  • Enhanced vibration immunity eliminates adjustment costs.
  • Self-diagnostic functions reduce regular maintenance costs for a maintenance-free meter.
  • User-friendly parameters are easily set by categorizing frequently used parameters into one group, reducing total maintenance costs.

Noise Reduction

Noise caused by strong piping vibration may affect the accuracy of vortex frequency detection. The two piezoelectric elements in the digitalYEWFLO are installed in a configuration that is polarized, so they are not affected by vibration in the flow or vertical directions. The noise of vortex (lift)-direction vibration is reduced by adjusting the outputs of the piezoelectric elements. Combining these features with the Spectral Signal Processing (SSP) function provides optimum and stable measurement.

Digital Yewflo Vortex Flowmeter

Steam Flow Measurement

Digital Yewflo Vortex FlowmeterSteam has often been described as the 'lifeblood' of the industry. Vortex meters are known to be superior devices for steam flow measurement due to their inherent linear measurement, large turndown, low pressure drop, and high accuracy.

The vortex flow meter is ideal for high temperature, superheated, and saturated steam applications since it eliminates the need for separate components and associated installation temperature. In addition, it provides quality, dependability and high pressure ratings along with a stable and reliable flow measurement.

Read the application note to learn more.

Liquid Applications

Liquid applications in the oil refinery industry become challenging since the process liquid is a higher viscosity at lower process temperatures. As a result, clogging becomes an issue when a flow meter has moving parts.

digitalYEWFLO vortex meters have advanced self-diagnostics that alert the operator if clogging or plugging in the area around the shedder bar are present. Alerts are also triggered in high-vibration environments and those with excessive flow fluctuations in the area around the shedder bar. This enables automatic condition-based maintenance.

Reverse Osmosis

RO systems are designed for automatic operation and require routine preventative and corrective maintenance. Common problems include membrane fouling and the use of improper flow rates.

Vortex flow meters measure low-conductivity flow, are cost-efficient, and deliver accurate flow rates, making them perfect for reverse osmosis applications.

Required Straight Pipe Length

Classic Vortex Flow Meter

Digital Yewflo Vortex Flowmeter


Digital Yewflo Vortex Flowmeter

Installation Style

Digital Yewflo Vortex Flowmeter 

Converter Direction

Digital Yewflo Vortex Flowmeter  


Yokogawa Vortex Flow Meter Installation Manual

1, Wafer Type

Vertical Installation- (1) Insert two collars on each two bolts of bottom side of the flowmeter. (2) Fit the flowmeter body to the collars. And tighten the four bolts and nuts uniformly. (3) Check for leakage from the flange connections.

Horizontal Installation- (1) Insert two stud bolts in the bolt holes on the flowmeter shoulder to align the instrument body with the inner diameter of the adjacent piping. (2) Tighten all bolts uniformly and check that there is no leakage between the instrument and the flanges.

2. Flange Type

Use the stud bolts and nuts supplied with the flowmeter of the user. The gaskets should be supplied by the user.

3. Remote Type Converter

The converter is mounted on a 2-inch (60.5mm outer dia.) stanchion or horizontal pipe. Do not mount the converter on a vertical pipe. It makes wiring and maintenance difficult.

digitalYEWFLO Models

Model Description
DY015 Size 15 mm (½ inch)
DY025 Size 25 mm (1 inch)
DY040 Size 40 mm (1½ inch)
DY050 Size 50 mm (2 inch)
DY080 Size 80 mm (3 inch)
DY100 Size 100 mm (4 inch)
DY150 Size 150 mm (6 inch)
DY200 Size 200 mm (8 inch)


  • CENTUM CS 3000 ensures safe and reliable operation of one of the world's most advanced LNG carriers.
  • Yokogawa successfully installed a CENTUM CS 3000 integrated control automation system(ICAS).
  • Yokogawa's integrated solution contributed to reliable and efficient operation.
  • All the instrument information is fully integrated with the instrument management system.

Yokogawa's digitalYEWFLO Reduced Bore Type Vortex Flow meter features a cast stainless steel body and a concentric reducer and expander that enable stable flow rate measurements in low-flow conditions. This expands the range of measurements that can be performed, from the higher flow rates down to the lower end of the flow span, which is normally difficult for Vortex Flow meters, and ensures stable and accurate flow rate output.


It is estimated that almost two thirds of oil discovered in the United States lies unrecovered trapped in porous formations. There are approximately 500,000 abandoned wells containing such oil. Because of this fact oil companies are constantly pursuing methods for the recovery of this oil.

Yokogawa Technical Report

Progress in digital signal processing and network technologies has enabled advanced functions which cannot be achieved by traditional field devices with 4-20 mA signal, to be implemented on field devices. Standardization of international fieldbus specifications, notably the FOUNDATION™ Fieldbus, has enabled users to build optimum field networks comprised of freely chosen field devices from various device vendors.


Vortex flow meters utilize a fluid phenomenon in which frequencies of Karman vortex streets released from a shedder bar inserted in a flow are proportional to flow velocities.

If a wafer style meter is purchased, Yokogawa supplies the studs and nuts to install the meter. Gaskets are not provided.   If a flanged meter is purchased, the bolts and nuts are not provided and must be supplied by the end user. Gaskets ...


Engineering Tools

2D/3D Configurator

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