Vortex flow meter


The SITRANS FX300 vortex flowmeter provides accurate volumetric and mass flow measurement of steam, gases and liquids as an  all-in-one solution with integrated temperature and pressure compensation.        

The vortex flowmeter product program consists of two types of flowmeters, a flange and a sandwich version, making Siemens unique as it covers all possible applications. The flange version is available with a  single or dual converter, whereas the sandwich version is only available  with a single converter. Both versions have the temperature sensor integrated and the pressure sensor as an  option.

The SITRANS FX300 vortex flowmeter is available  in  a  compact  or  remote version (Cable length: 5m, 10m or 15m).  

This product is also available as a customized product, please see Product Variation Request (PVR).


Key applications for the SITRANS FX300 are found in supply processes (auxiliary service), Chemical industry, HVAC, Power plants, Food & beverage industry and Oil & gas industry.


Measuring range

Use calculation and sizing program (link)

Nominal size flanged version
Nominal size Sandwich version

From DN15  to DN300 (½”  to 12”)
From DN15  to DN100 (½”  to 4”)


Steam and gases: +/- 1%
Liquids: +/- 0.75%

 Input / output

4 – 20 mA, Pulse/Freq. 0.5 Hz, 24V DC as NAMUR



 Power supply


 Operational pressure

Max 100 Bar (higher pressure on request)

 Ambient temperature

From -40  to 85°C (-40  to 185 °F)

 Medium temperature

From -40 °C  to 240 °C  (-40  to 464 °F)


2 lines, 10 characters per line
Languages: German, English and French

 Transmitter Enclosure

IP 66 / 67 Aluminum Seawater Resistant

 Sensor Material

1.4404/316L, Hastelloy C22 (on request)


ATEX ll 2G EEx d ia [ia] llC T6
FM Class I, II, III Div. 1 & 2


  • Maintenance-free due to fully welded sensor construction providing excellent stability and reliability

  • Contains three measuring points in one device with no extra equipment, installation or cabling costs

  • Saves downtime because of isolation valve, which makes an exchange of pressure sensor possible without interrupting the process

  • Easy installation because of Plug & Play

  • Redundant system as a dual transmitter version is available