Clamp-on Ultrasonic Flow Meter

The SITRANS FS230 digital clamp-on ultrasonic flowmeter is a process-optimizing solution for measuring flow in virtually any typical or hazardous area liquid application. Designed to provide rugged and exceptional performance with outstanding cost savings, the FS230 is an ideal fit for many industries requiring high-quality liquid flow measurement – including liquid hydrocarbon, chemical, water and wastewater, HVAC, power, food and beverage, pharmaceutical, mining and pulp and paper, etc.  Almost anywhere liquid flows in a pipe, the clamp-on ultrasonic flow meter is ready to meet the challenge.

SITRANS FS230 Catalog Specifications

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One of the world’s first digital ultrasonic flow systems, the FS230 features among others:

  • Market-leading accuracy and repeatability – Accuracy of 0.5 to 1.0% of flow rate for all liquids/pipe sizes and repeatability of 0.25% according to ISO 11631
  • Industry-leading 100 Hz data update rate – Detects even the smallest variations in flow 100 times a second
  • Easy to read and use graphic Human Machine Interface (HMI) – Offers intuitive menu-driven navigation as well as step-by-step setup and troubleshooting wizards, with up to 6 user-configurable views on display at a time
  • SensorFlash® internal, non-volatile data storage – Stores settings, calibration/ datalogger information and certificates for easy servicing and increased uptime
  • Versatile sensors  – Requires little to no maintenance and can be installed on pipes as small as 0.5 inches and as large as 394 inches (33ft) without issue


Technical specifications

The SITRANS FS230 flow system consists of a SITRANS FST030 transmitter paired with SITRANS FSS200 clamp-on ultrasonic sensors, which are available in three different models: WideBeam® (High-Precision), Universal and High-Temperature.

Operation and Instruction Manuals


Updated Hazardous Area Approvals
Download Press Release 

Wall mount enclosure, 1- or 2-path
HART 7.5 or Modbus; compatible with SIMATIC PDM
IP66/67, NEMA 4X rating
Up to 6 channels combining analog, relay or digital outputs and binary input + RTD
Full graphical display, 240 x 160 pixels
Power supply
20 to 27 V DC, 100 to 240 V AC, 47 ... 63 Hz (universal power supply)
Conductive and non-conductive liquids
Pipe sizes
12.7 mm to 10 m (0.5" to 394")
Sensor materials


Size A/B: Polyetherimide, stainless steel, aluminum (optional)

Size C/D: Polyetherimide, stainless steel

Size A/B: Polyetherimide, stainless steel, aluminum (optional)

Size C/D: Polyetherimide, stainless steel

High-Temperature: Stainless steel

Temperature range


WideBeam®: -40 to 120 °C (-40 to 250 °F)

Universal: -40 to 120 °C (-40 to 250 °F)

High-Temperature: -40 to 230 °C (-40 to 450 °F)

Pipe material

WideBeam®: Steel and carbon steel

Universal: Most non-steel

High-Temperature: Steel and non-steel

FM, ATEX and IECEX (Zone 0, 1 and 2)

This three part video series will walk you through the SITRANS FS230 set-up

Download, Support, Services

Find download, support and services for the Siemens clamp-on ultrasonic flowmeters
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Proposed solutions for your queries and direct access to our experts in Technical Support.

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 F S 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.

Customer Support: 1-800-333-7421

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