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Vortex Flow Meter

Vortex flow meters generates vortexes (Von Karman Swirls) using triangular prism and measures the frequency of vortexes which is proportional to fluid flow rate Quick look at Nagman’s Vortex Flow Meters

Custody transfer of natural gas metering

General water applications

Steam measurement

Liquid chemicals & pharmaceuticals

No moving parts, and the measuring component has a simple structure, reliable performance and long service life.

The turndown ratio can generally reach 1:10.

Wide measuring range.

Not affected by thermal parameters such as temperature, pressure, density or viscosity of the fluid being measured

Causes little pressure loss.

High accuracy, and low maintenance.

Measured Medium Liquid, Gas, Steam
Medium Temp. -40°C to 250°C;
-40°C to 350°C (high temperature type)
Pressure Flange DIN PN10/PN16/PN25/PN40
ANSI 150#/300#
Water 40 Bar
Thread 16 Bar
Tri-clamp 16 Bar
Insertion 16 Bar
Accuracy ±1.0% (Flange/Wafer/Thread/Tri-clamp)
±1.5% (Insertion type)
Flow Range Liquid:0.4-7.0m/s
Specifications DN15-DN300 (flange/wafer type)
DN80-DN2000 (insertion type)
 DN15-DN100 (thread/sanitary type)
Body Material SS304 (standard)
 SS316 (optional)
Reynolds Number Normal 2×104~7×106
Resistance Coefficient Cd≦2.6
Vibration Acceleration Allowed ≦0.2g
Ambient Condition Ambient Temp. -40℃~65℃
Relative Humidity ≦85%
Pressure 0.86-1.06 bar
Power Supply DC12-30V or 3.6V lithium battery powered
Signal Output 4-20mA, Pulse
Communication RS485 Modbus or HART

Product Details


A vortex flow meter is a device used for measuring the flow of gases and liquids. It operates based on the principle of the Karman vortex street, where vortices are shed from a bluff body inserted into the flow, and their frequency is proportional to the flow rate.
Vortex flow meters are commonly used in various industries, including HVAC, industrial processes, and utilities. They are suitable for measuring clean, non-viscous fluids and gases.
Vortex flow meters typically require fewer straight pipe runs than some other flow meter types.
Vortex flow meters are better suited for low-to-medium viscosity fluids. For high-viscosity fluids, consider alternative flow measurement technologies, such as positive displacement or Coriolis meters.
Vortex flow meters offer advantages like minimal pressure loss, no moving parts to wear out, high accuracy, and the ability to measure both liquids and gases. They are also relatively easy to install and maintain.
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