Vortex flow meter


Take your steam, gas and liquid measurements to a whole new level with the digitally based SITRANS FX330 vortex flowmeter. Designed primarily for applications in auxiliary, supply and energy systems, this device is also highly versatile for use in the process industry. 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 is also ideal for a broad range of chemical, power, and oil and gas installations.
The SITRANS FX330 combines the proven advantages of the well-established sensor program with the latest modern transmitter technology. Also, the SITRANS 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 flowmeter product program consists of two types of flowmeters, a flange and a sandwich version.


Nominal size flanged version
Nominal size sandwich version

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

Process values

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


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

Current output

4 - 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 rating

PN 10 – 100; Class 150 - 600

Medium temperature

From -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 integration level (SIL)

SIL2 according IEC 61508


  • 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)