Siemens SITRANS Vortex Flowmeters

SITRANS FX300 Vortex Flowmeter

  • Versatile Suitable for accurate standard volumetric and mass flow measurement of liquids, steam and gases
  • Accuracy Steam and gases: +/- 1% Liquids: +/- 0.75%
  • All in One Solution Complete system with integrated pressure and temperature compensation
  • Compact or Remote Design Transmitter can be compact mounted or up to 30 meters away from sensor with remote version
Product Options


Siemens SITRANS FX vortex flowmeters provide accurate volumetric and mass flow measurement of steam, gases and liquids as an all-in one solution and include integrated pressure and temperature compensation. The FX300 is a compact vortex flowmeter in a single or dual transmitter version, and is suitable for measuring industrial steam, gases, as well as conductive and non-conductive liquids. E.g. steam (saturated steam, superheated steam), industrial gases (compressed air, nitrogen, liquefied gases, flue gases), and conductive and non-conductive liquids (demineralized water, boiler feed water, solvents, heat transfer oil).

Siemens SITRANS F X vortex flowmeters detect the frequency at which alternating vortices are shed from a bluff body inserted into the flow stream in order to measure flow rate. This principle of measurement
is known as Von Karman's vortex street principle: alternating vortices form behind an object in a stream. The frequency of the alternating vortices is proportional to the flow rate. The passage of a vortex causes a slight stress on a pick-up placed downstream of the bluff body. The stress is picked up and counted as pressure surges by a dual Piezo crystal placed inside the wing.

The main applications of the SITRANS vortex flowmeters can be found in the following


  • All devices have 2-wire technology and HART communication
  • Temperature compensation for saturated steam is a standard feature
  • Pressure, temperature and flow can be read at a single point.No additional installation of pressure and temperature sensors
  • Direct measurement of energy or energy consumption
  • Integrated temperature and pressure measurement enabling direct compensation of density
  • Optimum process reliability thanks to Intelligent Signal Processing (ISP) - stable readings, free of external perturbations
  • Fully welded stainless steel construction with high corrosion, pressure and temperature resistance
  • Maintenance-free sensor design
  • Ready to use due to plug & play feature. No additional cabling work
  • Minimal pressure drop
  • All units parameterized prior to delivery
  • Pressure and temperature compensation for fluctuating volume flows
  • Measurement of consumption in compressed air systems
  • No risk of deposits or damage (sensor in the turbulent area

Manufactured by: Siemens-Milltronics
Model: SITRANS FX300 Vortex Flowmeter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Oil and gas
Power plants
Saturated steam
Super-heated steam
Energy monitoring


Measuring Range Use calculation and sizing program
Nominal Size Flanged version:
From DN15 to DN300 (1/2 inch to 12 inch)
Sandwich version:
From DN15 to DN100 (1/2 inch to 4 inch)
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


Related products


No, all of our flowmeters are competitively priced and rental is an ideal option for cutting costs to a fraction of a full priced new flowmeter.
No problem. The quick start guide is designed to make installing the flow meters a simple task. Everything you require for set up will be found in the peli-box supplied with the flowmeter.
Every flow meter is tested upon shipping and return as part of our ISO9001 procedure. Also, as part of this procedure, the flow meter is calibrated once a year. If a copy of the calibration certificate is needed let us know.
The flow meters typically provide an accuracy of ±1 to 2% of rate, so if you are measuring 100l/sec then the accuracy is between 98-102l/sec.
We are here to help. If the self-help and quick start guides do not help, then call one of our technical support engineers on +44 (0) 1527 882060. We have supplied and supported many clamp on rental installations throughout Europe.
First, contact us for a quote. If you are happy with the quote then send us a purchase order. Or alternatively call us with credit card details and fill out and send us a rental agreement form.
If the stock is permitting, and all paperwork is received by 12pm then flow meters can usually be available the next day.
The minimum hire period for flow meters is one week.
Once you have the meter you can rent it for as long as you need it. However, it would help if you can let us know that you wish to extend the rental period. Upon return the meter is off-hired and once checked and tested, an invoice will be issued to you. Also, if you extend your rental past a 4, 8 or 12 week rental threshold, then you are entitled to a discount.
You are only charged for the period of time for which you have the flowmeter. So, if a flowmeter is returned 3 days late you are only charged for 3 extra days, and each of these days is charged at one fifth of the weeks hire cost.
Normally, you will use your own courier but if you have any problems let us know and we can arrange a pick up the day after you notify us, but you will be charged for the carriage and this cost will be added to the invoice.
Without exception, all our flow meters are tested. If you need a 110v plug instead of the standard 230v plug let us know.
All of our standard transducers will do -40degC to +150degC, but this will depend on your application.
  • Liquid: below 50mm CFLP transducers are required, 50-1000mm CRS-402 transducers and 150-8000mm CRS-401 transducers. All the bits you need can be supplied, and delivered with the meter.
  • Gas: below 80mm CRS-402 is required, for 80-300mm the CRS-401/CRV-310 and for above 300mm the CRW-312 transducers are required.
  • High temperatures: For liquid we can measure +450degC for liquid and for gas/steam +250degC. But please consult RS Hydro.
Of course, we make a small surcharge for each set of transducers. Most applications only require one set, but on occasion some people may require two, for more diverse pipe sizes and applications.
An ultrasonic wall thickness gauge, that measures to within 0.05mm, is provided as standard with all flow meter rental packages.
The screendump facility on the integrated dataloggers on all our flow meters, allows you to photograph any screen and download it to your pc.
After the equipment has been shipped, it is the responsibility of the hirer. However, in our experience it is rare that any of our flow meters are damaged. Our flow meters are tough, as well as accurate, and reliable.
We have hired more ultrasonic clamp on flow meters than any other company in Europe. We are now one of the world's largest distributors of GE Panametrics flow meters. We always review your application before hire so no unwanted surprises are encountered. Every effort has been made to make your flow meter hire and enjoyable experience: quick start guides to help you set up with ease, online videos for further help, rugged packaging for extra durability anywhere, and real flow engineers available for online/telephone support.