Insertion Vortex Flow Meter is mainly used for flow measurement of gas, liquid, and steam fluid in large-diameter pipelines.

Insertion Vortex Flow Meter is used on large-size pipes. Reduce piping installation to save costs. The insertion vortex flowmeter is mainly used for large-caliber gas, liquid and vapor medium fluids. When measuring volume flow, it is hardly affected by fluid density, pressure, temperature and viscosity. With plug-in structure, there is no need to cut pipes and drill welded flanges. Just plug it in, easy to install. Greatly save labor costs and product costs.

Insertion Vortex flow meter reference price: USD 500-1500/pc.

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

Features of Insertion Vortex Flow Meter

  1. It is suitable for the measurement of large-diameter pipelines (DN150~DN2000), and is used in occasions that require less precision;
  2. Easy installation, no need to cut pipes. Greatly save labor costs and product costs;
  3. It has a very unique medium versatility. It can be used for flow measurement and control of most steam, gas and liquid;
  4. Simple structure, no holes and gaps design. No wear, dirt, no moving parts, low failure rate. Has high stability and reliability;
  5. The vortex flowmeter uses the latest signal processing technology, and the entire system analyzes the measured signal. Then eliminate external interference and medium disturbance. Therefore, stable measurement can be achieved even in harsh process conditions;
  6. The piezoelectric element of the vortex flowmeter is embedded in the probe body. No contact with the medium, no filler inside. Low pressure loss and long service life;
  7. The vortex flowmeter originally forms a signal. Its output frequency has a linear relationship with flow rate. There is no zero drift problem;
  8. Adopt advanced digital signal processing technology. Low lower limit and excellent vibration resistance.

Specifications of Insertion Vortex Flow Meter

Measuring mediumSuperheated/saturated steam, liquid and gas
Measuring rangeSee the flow range table of the plug-in vortex flowmeter for details
DiameterPlug-in: DN150~DN2000
Connection methodPipe opening with connecting flange
Flange standard GB9119-2000 1.6, 2.0, 2.5, 4.0 (MPa)
structureIntegrated type, split type, diving type
Probe body insertion rod304 (standard supply), 316L (other material supply agreement)
Medium temperature (℃)(-40~80)℃, (-40~250)℃, (-40~350)℃
Environment temperature (℃)(-30~+65)℃ Atmospheric pressure: 86kPa~106kPa
Nominal pressureLiquid 1.6MPa, 2.0MPa, 2.5MPa, 4.0MPa
Gas and steam 1.6MPa, 2.5MPa
Velocity range (m/s)Liquid: 0.5~5, Gas: 6~500, Steam: 7~60
Output signal1: No local display frequency signal: high level ≥5V low level 1V, square wave, pulse duty ratio: 1:1
2: Standard current signal; (4-20) mA standard current signal proportional to the flow
3: Local display instantaneous flow, cumulative flowmeter. Simultaneously output the proportional (4-20) mA standard current signal and pulse frequency signal or (4-20) mA+HART
Power supplyVoltage pulse type: DC12V or DC24V
Standard current output, local display: DC24V
Battery powered local display lithium battery: 3.6V
Ambient temperatureAmbient temperature (-40~+55) ℃,
relative humidity 5~90 ​​(%),
atmospheric pressure: 86kPa~106kPa
Protection levelIP65 is used for indoor and outdoor installation,
IP68 can be used for diving installation
Explosion-proof gradeIntrinsically safe Ex ia ⅡC T6 Ga
displayLCD display instantaneous flow, cumulative flow, vortex frequency
Cable interfaceM20×1.5 (internal thread, recommended); 1/2NPT (internal thread)

What is Vortex Flow?

When a fluid moves through a stationary object (“bluff body”) with a high Reynolds number, the fluid becomes a vortex on either side of the object.
Each vortex will form, then separate from the object and continue to move with the flowing gas or liquid, once twisted in an alternating manner.
This phenomenon is called vortex rotation, and the pattern of moving vortices carried downstream of a stationary object is called vortex street.

How does a vortex flow meter work?

Vortex 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.

More about vortex flow meter working principle wikipedia.

OMEGA Engineering has a great explanation video about vortex flow meter working principle. Let’s take a look!

Video source:

Types of vortex flow meter

Depending on the mounting style, the types of vortex flow meters include:

  1. Insertion flow meter
    Each insertion type of vortex flow meter consists of a built-in bluff body and three sensors, namely one sensor to record the vortex shedding frequency, an RTD temperature sensor, and a solid-state pressure sensor. These components are located in close proximity to each other in a short tube and together they form an assembly called an insertion sensor head. The sensor probe is inserted carefully into a hole made into the pipeline using flanged or male NPT process connections.

This flow meter is also provided an LCD display and keypad to program and monitor the system settings. The insertion flow meter used in pipes which are 2 inches or larger. Since it is a retractable meter, there is no need to shut down the system to take the required measurements.

  1. Inline flow meter
    An Inline flow meter is similar to the insertion flow meter in terms of its components. It also has a bluff body and three sensors to register the vortex shedding frequency, temperature, and pressure. It differs from an insertion flow meter in that it replaces a part of the pipeline and not inserted through it.

Classified by connection method

The connection mode of vortex flowmeter and pipeline can be divided into flange connection type and flange clamping type. These two connection types have their own advantages.

The flange connection type connects the vortex street meter body and the flange into a whole, which is easy to install. But it increases the machining cost for the manufacturer. For different pressure levels, flanges with different pressure levels need to be cast and smelted. The user needs to install the matching anti-flange on the pipe during installation.

However, the flange-mounted flowmeter has no bulky flanges at both ends, which is relatively light. On the premise of ensuring the sealing surface and mechanical strength requirements, it is enough to only manufacture the flangeless surface.

When users use it, they can choose flanges with different pressure levels according to different working pressures. Connect it with bolts, and then directly weld to the pipe.

Where are vortex flow meters used?

The vortex flowmeter is mainly used in the flow measurement of industrial pipeline medium fluid. The medium can be gas, liquid, steam, etc. The main scope of action includes:

  • During industrial production, such as metallurgy, coal, electric power, chemical, pharmaceutical, environmental protection and other manufacturing;
  • Energy measurement. Including the scientific measurement of primary and secondary energy. Such as coal, petroleum gas, natural gas, etc., to achieve energy saving and reduce consumption;
  • Environmental protection engineering. Including flow measurement of flue gas, sewage, etc.;
  • Transportation. Including pipeline transportation for control, distribution and scheduling, and better economic accounting through measurement results.
Vortex Flowmeter Measurement System

Vortex flow meter advantages and disadvantages

1.Advantages of vortex flowmeter

(1) The vortex flowmeter has no moving parts, and the measuring element has a simple structure, reliable performance and long service life.

(2) The vortex flowmeter has a wide measuring range. The turndown ratio can generally reach 1:10.

(3) The volume flow of the vortex flowmeter is not affected by thermal parameters such as the temperature, pressure, density or viscosity of the fluid being measured. Generally, no separate calibration is required. It can measure the flow of liquid, gas or steam.

(4) The pressure loss it causes is small.

(5) The accuracy is high, the repeatability is 0.5%, and the maintenance is small.

2.Disadvantages of vortex flowmeter

(1) The volume flow of the vortex flowmeter is not affected by the temperature, pressure, density and other thermal parameters of the measured fluid. But the final measurement result of liquid or steam should be mass flow, and for gas, the final measurement result should be standard volume flow. Both mass flow or standard volume flow must be converted by fluid density. The changes in fluid density caused by changes in fluid operating conditions must be considered.

(2) The main factors that cause flow measurement errors are: measurement errors caused by uneven pipeline flow rates; it is impossible to accurately determine the medium density when the fluid working condition changes. The wet saturated steam is assumed to be dry saturated steam for measurement. If these errors are not limited or eliminated, the total measurement error of the vortex flowmeter will be very large.

(3) Poor vibration resistance. External vibration can cause measurement errors of the vortex flowmeter, or even fail to work normally. The high-velocity impact of the channel fluid will cause additional vibrations to the cantilever of the vortex generator, which reduces the measurement accuracy. The influence of large pipe diameter is more obvious.

(4) Poor adaptability to measuring dirty media. The generating body of the vortex flowmeter is very easy to be dirty by the medium or entangled by the dirt, and the change of the geometric body size has a great influence on the measurement accuracy.

(5) High requirements for straight pipe sections. Experts pointed out that the straight pipe section of the vortex flowmeter must ensure the front 40D and the 20D to meet the measurement requirements.

(6) Poor temperature resistance. Vortex flowmeters generally can only measure the fluid flow of media below 300°C.

Insertion vortex flow meter installation

1.Continuous flow dismountable sensor

①The mounting seat is welded well. First install the ball valve on the mounting seat, tighten and seal with bolts;

②Open the ball valve. Insert the vortex probe into the ball valve. Then tighten the lifting mechanism and the ball valve with bolts. Pay attention to sealing;

③Before leaving the factory. The insertion depth of the measuring head has been adjusted. Do not adjust or disassemble the measuring head at will. Otherwise, it may cause leakage or affect measurement accuracy.

2. Dismountable sensor after the current is cut off

Because the insertion depth of the sensor is designed according to the user’s measuring pipe diameter. So only pay attention to the installation direction when installing. Fasten it with bolts.

Insertion vortex flow meter installation

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Vortex Steam Flow Meter

The vortex steam flow meter concentrates temperature and pressure compensation in the vortex flowmeter. Automatically detect the temperature and pressure of the medium in the pipeline, and the density automatically participates in the calculation. It can display the instantaneous mass flow and cumulative mass flow of the medium. It can also display the temperature and pressure of the medium. It can measure liquid, general gas, saturated steam, superheated steam, etc.

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

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Sino-Instt offer over 10 Insertion 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 Insertion Vortex shedding flow meter suppliers, located in China. Vortex shedding flow meter products are most popular in North America, Mid East, and Eastern Europe.

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