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1/2" to 4" Multivariable Vortex Mass Flow Meter.

Regular price $3,100.00 Sale


Vortex Mass Flow Meters at the prices of high end Thermal Mass Flow Meters and are at 1% of READING.

Vortex Meter Digital Display

Multivariable Vortex Meter

See the video below to see how to use the buttons on the display within the enclosure. 

Features LARGE LCD display, shows the Flow Rate, Total Flow, Temperature, and Pressure in user selectable units.

Vortex Manual

 Vortex Meter Specifications.

  • Wetted Materials all 304 SS 
  • Velocity Range: See detail below.
  • Velocity Accuracy: +/- 1% of reading
  • Repeatability of +/- 0.05% of reading
  • 1/2" to 4" 150# ANSI Flange Connections, up to 12" available custom.
  • LCD Display
  • Temperature Accuracy +/- 1 Deg C
  • Temperature:         
    • Gas: -40°F (-40°C) to 662°F (350°C)
    • Ambient: -40°F (-40°C) to 131°F (55°C)              
  • Power Requirement: 24 VDC, 15 Watts maximum;   
  • 3.6 VDC Lithium C Size battery for intrinsic safety mode. Has LCD Display but no 4-20 or ModBus
  • Output signals: Modbus RTU, 4–20 mA, and 0-1.0 KHz for flow rate indication
  • Digital communications: Modbus RTU
  • Max Pressure 1.6 MPa, 230 PSIG. (Custom up to 4.0 MPa 580 PSIG)
  • Display: Flow rate, Total flow, Temperature, and Pressure
  • Wiring connection to enclosure size: M20 x 1.5
  • Factory Final QC Test Certificate
  • Integral Electronics
  • Electronics Enclosure NEMA 4X / IP67

Vortex Meter Velocity Ranges:

The Vortex meter has different minimum and maximum flow velocities it can measure based on the fluid type and meter size. Please note the values below for proper sizing of your meter. 

  • Steam:
1/2” ANSI Flange: 4-7 0m/s.
1” ANSI Flange: 3-70m/s.
2” to 12” ANSI Flange: 1.5-70m/s.
  • Gas: 
1/2” ANSI Flange: 4-65m/s.
 1” ANSI Flange: 3-65m/s.
2” to 12” ANSI Flange: 1.5~65m/s.
  • Liquid: 
1/2” to 12” ANSI Flange: 0.2-10m/s. 

Nominal Vortex Flow Rates for Air

The table below gives the minimum, nominal, and maximum velocities for the Vortex Meter for gases to assist users familiar with Thermal Mass Flow Meter sizing guides relative to air, with a density of 0.075 lb/ft^3 for reference. As the pressure goes up the flows go up as well. For example, if the pressure is DOUBLED, so too does the mass flow. Download chart below here:

Vortex Mass Flow Meter Flow Rates for various pipe sizes

 IMPORTANT Note to Thermal Mass Flow Meter users...

Did you know that Multivariable Vortex Flow Meters offer a significant advantage over Thermal Mass Flow Meters when it is not necessary to measure ultra low or ultra high flows?

Did you know that a Multivariable Vortex Meter is not affected by gas composition? This means you can change gas composition and STILL report the proper Mass Flow! Why utilize a Gas Chromatograph to determine gas composition to correct your Thermal Mass Flow Meter measurement? If you need ultra low flows it makes sense but if your minimum flows are within the measuring range of a Vortex meter then consider a Multivariable Vortex Mass Flow Meter.

Ever have problems with temperature swings causing your Thermal Mass Flow meter to over or under report the flow measurement? The Multivariable Vortex Mass Flow Meter does not exhibit these symptoms simply because the vortex shedding velocity is not a function of temperature or pressure. And, with the Multivariable Vortex Meters built in Pressure and Temperature sensors you can get true Mass Flow, Pressure, AND Temperature and even gather Volume flow on those rare occasions when deemed necessary. And, you have a true pressure measurement as well as the Mass Flow and temperature. All at a price very competitive with Thermal Mass Flow Meters.

HOWEVER, if you DO need very low or very high flows we suggest the use of Thermal Mass Flow Meters and suggest you consider the use of the Sage Metering Prime for the most cost effective solution. Tell them we sent you! Visit Sage Metering if you need to measure very low flows, or need an Insertion Thermal Mass Flow Meter. Refer to the chart above for the minimum and maximum flows.

Vortex Multivariable Flange Meter Dimensions with 150# ANSI B 16.5 Flanges

Multivariable Vortex Meter Dimensions, TacticalFlowMeter.com

Vortex Meter Specifications and Dimensions:
Download Brochure
 , Specifications and Dimensions..

How to use button interface and ModBus RTU video:To get the most out of the video open the link below and print out the document or open it in another window

ModBus commands and Meter codes

Vortex Manual

How to Invoke Variable K-Factors in the TacticalFlowMeter Vortex Flow Meter:

Screen 33 Instructions are for advanced users only. Do NOT invoke this screen on your meter unless you have a pressing need. It is important to note all settings PRIOR to making any changes. Note: Left button HOLD gets you OUT of menus.

See example spreadsheet here

Video showing how to use the spreadsheet above and the Front Panel Interface with Menu 33:

Before exiting ensure you SAVE the data and CONFIRM the % numbers are ever increasing in from element 0 to element 4. The Correction ratio must be between 0.8 and 1.2