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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”)
Accuracy Steam and gases: +/- 1%
Liquids: +/- 0.75%
Input / output 4 – 20 mA, Pulse/Freq. 0.5 Hz, 24V DC as NAMUR
Communication HART
Power supply 24V DC as NAMUR
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)
Display 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)
Approval 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