SITRANS FS290 is a portable ultrasonic flowmeter system for monitoring volumetric flow in pipes. It contains the SITRANS FST090 battery-operated transmitter and SITRANS FSS220 clamp-on sensors. Install the sensors quickly and easily on the outside of a pipe – without any process interruptions or plant downtime

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SITRANS FS290 flexible, versatile, practical

  • Check metering, temporary and test measurements
  • Compensation of flow disturbances through the anomaly compensation
  • Long battery life, simple battery replacement
  • Measurement accuracy of 1% under good conditions

Technical specifications

Measuring path
Single path – versions 
Modbus RTU, compatible with SIMATIC PDM
Enclosure rating
IP67 (NEMA 4X) with closed lid

240 x 160, fully graphical

Power supply or battery operation
2x digital inputs for totalizer start/stop and reset
1x 4 -20 mA, 1x relay, 1x pulse/frequency
1% for velocities ≥ 0.3 m/s (1 ft/s)
Flow range
±12 m/s (±40 ft/s), bidirectional
Pipe size range
10 mm bis > 6 m (0.5" bis 240 ")
Wall thickness
0.5 - 35mm (0.02" to 1.4")
40 °C to +120 °C (high temperature up to 230 °C)

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Service offers

To remain competitive, companies in industry must ensure – and ideally increase – the availability and productivity of machines and plants. As your partner, we offer a unique range of services and support based on our extensive technology and industry expertise.

Service catalog

As your partner, we offer a unique range of services and support based on our extensive technology and industry expertise. With our offerings, you can expect a high degree of reliability and a successful digital future for your company.

Well trained for excellent handling

Receive standardized or individual expertise directly from the manufacturer – with training centers in more than 60 countries.

Safety integrated

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 FS has you covered

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

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