Vortex shedding flow meter, also called Vortex flow meter. Vortex shedding flow meter is suitable for measuring steam flow rate as well as liquids and gases.


Vortex shedding flow meter, easy installation, low cost, analog and 4-20mA output. Pressure & temperature compensation can improve the sensor for more accurate measurement. Vortex shedding flow meter is suitable for measuring steam and various liquids and gases. When the fluid flows through the assembly line of the vortex flowmeter, a vortex is formed. The frequency of vortex shedding is directly proportional to the fluid velocity.

Vortex shedding flow meter reference price: USD 200-1500/pc.

Sino-Inst offers a variety of  Vortex flow meters for flow measurement. If you have any questions, please contact our sales engineers.

Industrial Vortex Shedding Flow Meter Features

  1. Sonic nozzle calibration. High repeatability and high measurement accuracy
  2. Temperature compensation and pressure temperature can be freely selected. To meet more on-site use
  3. The circuit board is aging and running before leaving the factory. And the whole meter is calibrated one by one. It is more suitable for on-site use
  4. Wide application range. Gas, liquid and steam can be measured
  5. Low pressure loss. Low energy loss. Conducive to energy saving
  6. Simple and firm structure, no moving parts. High reliability and low maintenance

Specifications of Vortex Shedding Flow Meter

Diameter(mm)DN15,20,25,40,50,65,80,100,125,150,200,250,300,(300~1000 plug-in)
Nominal pressure(MPa)DN15-DN200 4.0 (>4.0,Consulting supply)
DN250-DN300 1.6(>1.6,Consulting supply)
Medium temperature(ºC)Piezoelectric type :-40~150,-40~260,-40~330℃;
Projected Capacitive:-40~400℃ (Consulting supply)
Body material 1Cr18Ni9Ti (Other material order by Consulting supply)
Permissible vibration
Piezoelectric type :0.2g   Projected Capacitive:1.0-2.0g
Range of degrees1:6~1:25
Power SupplySensor:DC+12V,DC+24V;
Battery-powered:3.6V battery
Output signalPulse:high level:≥5V
low level:≤1V;
electricity current:4~20mA
Pressure loss coefficientComply with JB/T9249 standard Cd≤2.4
Explosion-proof coefficientIntrinsic safety :Ex ia II CT2-T4
Explosion-proof type:Exd II CT2-T5
Level of protection Ordinary type:IP65 
Diving type:IP68
Environmental conditionsTempersature:-20ºC~55ºC,
relative humidity 5%~90%,
atmospheric pressure:86~106kPa
Applicable mediumgas ,liquid,steam
Transmission distance Three-wire pulse output:≤300m,
Two-wire standard current output:(4~20mA)≤1500m
load resistance≤500Ω;

Vortex Shedding Flow Meter Structure

The basic structure of LUGB series vortex flowmeter is shown in figure 1. It is mainly
composed of shell, vortex generator, flow sensor, temperature sensor, pressure sensor, shield bar,
integrator and other main accessories

  1. Integrating instrument
  2. Pressure transducer
  3. Shielding rod
  4. Shell
Table of operating flow range of vortex street flow sensor under reference condition
Range of measurements
frequency range
Range of measurements
frequency range
15 0.3~5 35~600 2.2~20 260~2000
20 0.6~10 29~420 4~36 210~1900
25 1.2~16 25~336 8.8~55 190~1140
32 1.8~20 18~264 10~150 156~1080
40 2~40 10~200 27~205 140~1040
50 3~60 8~160 35~380 94~1020
65 4~85 6~120 35~800 94~940
80 6.5~130 4.1~82 86~1100 55~690
100 15~220 4.7~69 133~1700 42~536
125 20~350 3.2~57 150~2000 38~475
150 30~450 2.8~43 347~4000 33~380
200 45~800 2~31 560~8000 22~315
250 65~1250 1.5~25 890~11000 18~221
300 95~2000 1.2~24 1360~18000 16~213
-300 100~1500 5.5~87 1560~15600 85~880
-400 180~3000 5.6~87 2750~27000 85~880
-500 300~4500 5.6~88 4300~43000 85~880
-600 450~6500 5.7~89 6100~61000 85~880
-800 750~10000 5.7~88 11000~110000 85~880
-1000 1200~1700 5.5~88 17000~170000 85~880
>(100) Consulting supply   Consulting supply  

Vortex Shedding Flow Meter Working Principle

Vortex flowmeter is a speed-type flowmeter produced according to karman’s vortex principle,
which can be used for the measurement and measurement of conventional gas, steam and

Vortex flow sensor has high precision and wide range ratio, no moving parts in use, which can
improve mechanical stability and reduce maintenance.Vortex flowmeter is almost not affected by the temperature, pressure and composition of medium when measuring the volume of working condition.

Therefore, it is convenient to calibrate the instrument, so vortex street flow sensor is widely used in production and life.

When a trigonal column vortex generator is set in the fluid, regular vortices are generated alternately on both sides of the vortex generator, which is called Carmen vortex.

The vortex columns are arranged asymmetrically downstream of the vortex generator. Vortex flowmeter is produced according to this principle.

Vortexes are generated by generating bodies and the number of vortexes is detected by high-sensitivity sensors. In a certain range, the number of vortexes generated is proportional to the flow rate.

Vortex Shedding Flow Meter Working Principle

In vortex flowmeter, the relationship between flow rate and the number of vortexes generated
can be expressed by the following formula:

Q:Operating volume flow of the measured medium. The unit is m3/h。
F:Frequency of the number of vortices produced by the generating body. The unit is Hz.
K:Refers to the calculated or calibrated flow coefficient. It represents how many frequency signals per cube. the coefficient is usually obtained by calibration.

The formula of standard table method calibration coefficient K:

The formula can also be used for flow correction.

Applications of Vortex Shedding Flow Meter

Steam Flow Measurement

Steam 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 flowmeter 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 more about: Steam Flow Measurement: Do you need temperature and pressure

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.

Sino-Instrument 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.

Extended reading: Integral DP Flow Meter|Gas, liquid, steam|Compact structure

Installation for Industrial Vortex Flow Meter

Know more about vortex shedding flow meter:

A vortex flow meter is a flow measurement device best suited for flow measurements, where the introduction of moving parts presents problems.

They are available in industrial grade, brass or all plastic construction.

Sensitivity to variations in the process conditions are low, and with no moving parts have relatively low wear compared to other types of flow meters.

Vortex flow meters operate under the vortex shedding principle, where an oscillating vortexes occur, when a fluid such as water flow past a bluff (as opposed to streamlined) body.

The frequency that the vortexes are shed depend on the size and shape of the body.

It is ideal for applications where low maintenance costs are important.

Industrial size vortex meters are custom built and require appropriate sizing for specific applications.

The Vortex Shedding flow meter detects the vortices, that are created by a process medium going past a bluff body.

The frequency of these vortices can be equated into flow velocity, which, in turn, is used to calculate volumetric flow rate.

The integral temperature sensor is used in saturated steam service, to determine the operating conditions and specific volume of the steam being measured.

The steam table incorporated into the electronics, then calculates the flow or energy of the steam flowing through the meter.

The optional pressure sensor can be used for similar calculations, for gasses and superheated steam.

Intelligent Signal Processing (ISP) provides stable readings, free of external influences.

What are the applications of vortex flowmeter?

  1. A vortex flowmeter can be used to measure the flow of various industrial water. Including chemical, light industry, electric power, metallurgy, building materials, petroleum and other industries in the production process of circulating water, wastewater, waste liquid measurement.
  2. Part of the measurement of corrosive liquids, such as sulfuric acid, hydrochloric acid, nitric acid, acetic acid, and other acids. And a variety of chemical solutions.
  3. The flow measurement of non-conductive liquids. Electromagnetic flowmeter in the flow measurement of conductive liquids dominates, while in the field of non-conductive liquid flow measurement, vortex flowmeter has a great place to use. In the petrochemical, pharmaceutical, food, semiconductor industry, vortex flowmeter has also been more widely used, for example methanol, formaldehyde, acetone, toluene, trichloroethylene, ethylene, butane liquid ammonia, etc., and semiconductor industry pure water and ultra-clean pure water, etc..
  4. Part of the low viscosity oil flow measurement, such as gasoline, kerosene, diesel oil, and heavy oil and residual oil flow measurement after the viscosity has been reduced by heating.
  5. Large diameter pipeline water flow measurement, full pipe vortex flowmeter is mainly used to measure small and medium diameter water flow, while the insertion type vortex flowmeter can be used to measure the flow measurement of large diameter pipeline. Vortex flowmeter is widely used in urban water pipelines and chemical, electric power, metallurgy, paper, and chemical fiber, and other enterprises in the industrial water mainline.

More industrial vortex flow meters:

Sino-Instt offer over 10 Vortex Shedding flow meters, with Best Price.

A wide variety of industrial Vortex shedding flow meters options are available to you, such as free samples, paid samples. All of our flow meters can wokrk with the AMS NEW TREX.

About 13% of these are magnetic flow meter, 14% are Insertion Magnetic Flow Meter, 25% are Venturi flow meter, 13% are Handheld ultrasonic flow meter, and others are Liquid Turbine Flow Meters.

Sino-Inst is Vortex shedding flow meter suppliers, located in China. Vortex shedding flow meter products are most popular in North America, Mid East, and Eastern Europe.

The United States, and India, which export 99%, 1%, and 1% of ultrasonic level transmitter respectively. You can ensure product safety by selecting from a certified supplier, with ISO9001, ISO14001 certification.

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