USA - SITRANS FS290 portable clamp-on ultrasonic flow meter

Portable Clamp-on Ultrasonic Flow System

SITRANS FS290 portable ultrasonic flow meter system is a battery- or mains-powered system, making it the perfect tool for monitoring volumetric flow in pipes that may be too remote for typical measurement systems. The FST090 system contains the battery-powered transmitter and SITRANS FSS220 clamp-on transducers and mounts. The transducers are quickly and easily installed or relocated, as needed, on the outside of a pipe without the need for any process interruptions or plant downtime. Quick, easy, portable and self-contained, the FS290 is the ideal tool for your testing and flow evaluation needs.

SITRANS FS290 Catalog Specifications

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Introducing the new SITRANS FS290 portable clamp-on ultrasonic flow meter


SITRANS FS290: Flexible, versatile, practical

  • Check metering; temporary and test measurements
  • Compensation of flow disturbances via anomaly compensation
  • Long battery life; simple battery replacement
  • Measurement accuracy of up to 1.0% of rate
  • 24-hour, full-capacity battery can easily be replaced with hot swap feature
USA | PI innovation award nominees - FS290

2022 Innovation Award Winner

The SITRANS FS290 portable clamp-on ultrasonic flow meter has received an Honorable Mention from the 2022 P.I. Process Instrumentation Innovation Awards! For more than 20 years, these awards have recognized the most groundbreaking instrumentation on the market, with the winners determined by a reader voting process.

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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Whether you need to measure pressure, temperature, flow, level or weight, Siemens has best-in-class instruments to suit the unique needs of your plant or application - along with a global network of technical support available 24 hours a day, 7 days a week. Our high-performance and cost-efficient range of industrial solutions also includes devices for valve positioning, process protection, recording, controlling, communication and more.

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