Inline ultrasonic flow measurement

Convenient ultrasonic technology. Exceptional performance.

When you need the highest-precision ultrasonic flow measurement, SITRANS F S inline ultrasonic flowmeters deliver. And this flexible product family has something for every industrial and utility application – ATEX approvals, HART and Profibus PA communication, comprehensive self-diagnostics and much more. Can’t afford process downtime? Siemens has cost-effective retrofit solutions, too – including battery-powered options for remote locations.

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Rugged reliability to measure both conductive and non-conductive liquids, including oils and liquid gases: that’s SITRANS F S inline.

• SITRANS FUS060 (Transmitter): advanced and flexible
• SITRANS F US SONO 3100/SITRANS FUS060 (System): for challenging applications requiring transducer replacement under pressure
• SITRANS F US SONO 3300/SITRANS FUS060 (System): for applications where transducer replacement is not required



Whether calculating energy in district heating, chilled water or combined cooling/heating applications, SITRANS F S inline flowmeters cover every installation imaginable.

• SITRANS FUS080 (Transmitter): comes in mains- and battery-powered versions for ultimate versatility
• SITRANS FUS380 (System): for water flow monitoring
• SITRANS FUE380 (System): with custody transfer approval for energy metering systems
• SITRANS FUE950 (Energy Calculator): can be used with various Siemens ultrasonic and electromagnetic flowmeters



SITRANS F S inline retrofit systems can be installed on existing pipes without stopping flow, making them the perfect choice for cost-effective ultrasonic flow measurement.

• SITRANS F US SONOKIT: the world’s first battery-powered weld-in flowmeter
• SITRANS FUS880: especially for the irrigation industry

Product information

SITRANS F S inline ultrasonic flowmeters

Call it the ultrasonic advantage. Because they can operate independent of conductivity, viscosity, temperature, density or pressure, SITRANS F S flow sensors and transmitters deliver impressive performance for a variety of liquids and gases – even under the toughest conditions. District heating and cooling? Water and wastewater treatment? Petrochemical plants? With Siemens inline ultrasonic meters, the possibilities are endless.

How does an ultrasonic flowmeter work?

When traveling in the same direction as a flowing medium, ultrasonic waves move faster than waves traveling against the flow. Ultrasonic flowmeters use this principle to accurately measure the volume of many liquids and gases – and also to derive parameters like density and viscosity. Watch the video to learn more!


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Safety is key in the process industries. A failure in instruments relevant for safety may have serious implications for humans, the process and the environment. Therefore, a wide range of our process instruments come with on-board safety features for maximum risk reduction.


Whatever your process challenge – SITRANS F S has you covered

Monitoring your processes with accurate inline ultrasonic flow measurement leads to higher transparency, improved productivity – and a better bottom line. To optimize every operation, Siemens offers a comprehensive selection of inline flow sensors, transmitters and complete flow systems.

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