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Vortex Flow Meter

VTF series Vortex flow meters a re designed for measuring the v olume/mass flow of liquids, gases and steam based on Karman vortex principle.

Adopting advanced differential algorithm along with measurement of isolation, shielding and wave filtering, VTF s eries vortex flow meters have the advantages of immunity on v ibration a nd noise. Meanwhile, the liabilities of VTF s eries v ortex f low meters are well guaranteed by unique sensor packaging technology.

Insertion Vortex Flowmeter

Use Medium: Steam

No moving Parts


Ball Valve Simple Insertion Insertion with ball valve
Type A Type B Type
Accuracy ±2.5% ±2.5%
Display Optional Optional
Output Signal Optional: Pulse or 4-20mA Optional: Pulse or 4-20mA
Communication Optional: RS485 Optional: RS485
Power Supply +24VDC±15% +24VDC±15%
Explosion Proof Optional: ExdIIBT6 or ExiaIICT4 Optional: ExdIIBT6 or ExiaIICT4
Protection Level IP65 IP65
Product Material 304SS 304SS
Pressure Rating 1.0MPa 1.0MPa
Fluid Temperature -20℃~250℃ -20℃~250℃
Ambient Temperature -20℃~70℃ -20℃~70℃

Inpipe Vortex Flowmeter

Use medium:Steam

Good for steam measurement

Accuracy: 1.5%F.S.

No moving parts

Signal Output Pulse 4-20mA NA 4-20mA Optional:4-20mA/Pulse
Power Supply 24VDC±15% Lithium Battery 4VDC±15%
Communication NA ptional: RS485
Accuracy Liquid: 1.0%; Gas: 1.0%; Steam: 1.5%
Local Display No No Yes Yes Yes
Housing Material SS304
Explosion Proof Optional: ExiaIICT5 or ExdIIBT6
Protection Level IP65 IP65 IP65 IP65 IP65
Diameter DN15 to DN300
End Connection Flange or Wafer
Pressure Rating Standard: 1.6 MPa; Optional: 2.5MPa
Fluid Temperature 1. Standard: -40℃~250℃; 2. High Temperature: -40℃~350℃
Ambient Temperature -20℃~60℃

Measuring system

Application range Gas; Liquid; Steam
Measured Value
Primary measured value Flow Rate
Secondary measured value Volume flow ; (Pressure and Temperature is available for model with compensation)


Modular construction The measurement system consists of a flow sensor and a signal converter. It is available as compact and as separate version.
Compact version converter N Type: Pulse output without local display
A Type: 4‐20mA Output without local display
B Type: Local Display; Lithium Battery Power; No Output (Battery Part No.: ER26500)
C Type: Local Display; 24V DC Power; 4‐20mA Output;
Optional Function:
(1) Backup Power Supply: Lithium Battery
(2) Modbus RS485
(3) Pulse Output
Connection Flange: DN15‐DN300
Wafer: DN15‐DN300
Measurement Ratio Standard – 10:1

Measuring accuracy

Reference conditions Flow conditions similar to EN 29104
Medium: Water / Gas
Electrical conductivity: ≥ 300 μS/cm
Temperature: +10...+30°C / +50...+86°F
Inlet section: ≥ 10 DN
Operating pressure: 1 bar / 14.5 psig
Flow Meter Accuracy For Liquid: 1.0% of rate
For Gas and Steam: 1.5% of rate
Inse rtio ntyp e: 2.5% of rat e

Operating conditions

Reference conditions
Process temperature T1 Level: ‐20...+70°C
T2 Level: ‐20...+250°C
T3 Level: ‐20...+350°C
Ambient temperature Standard (with aluminum converter housing):
Storage temperature ‐20...+70°
EN 1092‐1 DN200…DN300: PN10
DN100…DN200: PN 16
DN15…DN80: PN 25
Other pressures on request
ASME B16.5 1/2”...8": 150 lb RF
Other pressures on request
JIS 1/2”...8": 10 K
Other pressures on request

Installation conditions

Installation Take care that flow sensor is always fully filled
For detailed information see chapter "Cautions for Installation"
Flow direction Forward Arrow on flow sensor indicates flow direction.
Inlet run ≥ 10 DN
Outlet run ≥ 5 DN


Sensor housing SS304
Flanges SS304
Converter Housing Standard: polyurethane coated die‐cast aluminum

Process connections

EN 1092‐1 DN15...300 in PN 6...25
ASME 1/2”…12" in 150 lb RF
JIS 1/2”…12” in 10...20K
Design of gasket surface RF
Wafer DN15…DN300

Technology Sheets

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