Ponton Industries


Process Instrumentation

Vortex Flow Meter

Take your steam, gas and liquid measurements to a whole new level with the digitally based SITRANS FX330 vortex flow meter. Designed primarily for applications in auxiliary, supply and energy systems, this device is also highly versatile for use in the process industry. 

SITRANS FX330 Catalog 


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With its new features and enhanced functions like the integrated heat meter, status alarms in conformity with NAMUR NE107 and extensive Ex approvals, the SITRANS FX330 vortex flow meter is ideal for a broad range of chemical, power, and oil and gas installations. The FX330 combines the proven advantages of the well-established sensor design with the latest modern transmitter technology. Also, the FX330 is equipped with temperature compensation as standard for saturated steam applications. Upgrade it with the optional pressure sensor and the device turns into an all-rounder, combining flow, temperature and pressure measurement in one device. The vortex flow meter product line consists of two types of meters: a flange and a sandwich version.


  • Integrated pressure and temperature compensation

  • Temperature compensation for saturated steam included as standard

  • Non-wearing stainless steel construction with high resistance to corrosion, pressure and temperature

  • SIL2 certified according to IEC 61508 Edition 2

  • Useable in hazardous areas

  • Integrated reduction of nominal diameter for space-saving and economic installation

  • Redundant data management: Exchange of electronics without loss of calibration and configuration data

  • Gross and net heat calculation to support advanced energy management

  • Remote version available with cable length up to 50 m (164 ft)


Nominal size flanged versionFrom DN15  to DN300 (½”  to 12”) 
Nominal size sandwich versionFrom DN15  to DN100 (½”  to 4”)
 Process values

Volume flow, Mass flow, Corrected volume flow, Density, Temperature, Pressure, Heat energy

Accuracy Steam and gases: +/- 1%

Liquids: +/- 0.75%

Current output4 - 20 mA HART (loop powered)
Digital output

Pulse (max. 1000 Hz), frequency, status, limit switch


HART 7, Profibus PA and Foundation Fieldbus in preparation

Pressure ratingPN 10 – 100; Class 150 - 600
 Medium temperatureFrom -40 to 240 °C (-40 to 464 °F)
Material sensor Stainless steel 1.4404 (316L), Hastelloy C22 on request
Transmitter enclosure Die-cast aluminum
 Enclosure rating IP66 / 67 (NEMA 6)

EN 1092-1; ASME B16.5

Wafer design (centering rings included)

 Remote transmitter Connection cable up to 50m (164 ft), remote version in preparation
Temperature sensor Standard integrated temperature sensor
Pressure sensor Optional integrated pressure sensor with or without isolation valve
Display and keypad High-resolution graphical display and 4 operating keys (alternative use magnet pen)
Ex Approvals ATEX II2 G Ex ia - QPS IS Class I Div.1 - IECEx II2 G Ex ia

ATEX II2 G Ex d - QPS XP Class I Div.1 - IECEx II2 G Ex d

ATEX II3 G Ex nA - QPS NI Class I Div. 2 - IECEx II3 G Ex nA

ATEX II2 D Ex tb - QPS DIP Class II, III Div. 1 - IECEx II2 D Ex tb

 Safety integrations level (SIL)  SIL2 according IEC 61508