USA - SITRANS FS230 clamp-on ultrasonic flow meter

Clamp-on ultrasonic flow system

The SITRANS FS230 digital clamp-on ultrasonic flow system offers industry-leading flow measurement accuracy with cost savings in both purchasing and operation. The FS230 clamp-on flow meter is ideal for industries requiring high-quality liquid flow measurement, such as hydrocarbon, chemical, water and wastewater, HVAC, power, food and beverage, pharmaceutical, mining, and pulp and paper. It also works as a non-intrusive interface detector and is capable of measuring flow in petrochemical applications requiring differentiation between changing liquids in a pipeline as well as determination of liquid quality. 

SITRANS FS230 Catalog Specifications

Download PDF

Updated release for gas flow measurement applications

Featuring best-in-class performance and user-friendly operation, the SITRANS FS230 is now equipped to handle natural, specialty and process gas as well as liquid flow applications.


Approval options for the FS230 include FM (Factory Mutual) Canada, FM US Class 1 Division 2 and equivalent, ATEX, IECEx, or a selectable option code combining all approvals to provide almost complete worldwide coverage.


SITRANS FS230 with Ex approval

Built to meet the toughest demands of the hydrocarbon industry

Oil flow in refineries is a complex matter. The FS230 clamp-on ultrasonic flow meter with Ex approval accurately tracks the margin and volume being transported in pipeline segments, while keeping the environment protected.


Watch the video to learn more.


One of the world’s first digital ultrasonic flow systems, the SITRANS 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
  • Available internal AGA 9 gas tables – Simplifying correction for temperature and pressure variations in gas flow
  • Industry-leading 100 Hz data update rate – Detects even the smallest variations in flow 100 times a second
  • Three resettable totalizers – Allowing simultaneous totalizing for daily, monthly and annual lease production
  • 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 (33 ft) without issue


Technical specifications

The SITRANS FS230 flow system consists of an FST030 transmitter paired with 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 


External Digital Sensor Link (DSL) Released
Download Press Release


Wallmount enclosure: die-cast aluminum, painted, wall or standpipe mounting options, IP65/NEMA 4X for Ex zone 2 or Class 1 Div 2

Industrial enclosure: die-cast aluminum, painted, wall or standpipe mounting options, IP65/NEMA 4X for Ex zone 1/2 or Class 1 Div 1/2

Digital Sensor Link (DSL) – external variant up to 4-path: die-cast aluminum, painted, IP68, for use in Zone 0/1 or Class 1 Div 1/2

Internal DSL for 1-2-path variant; external SITRANS FS DSL for up to 4 path use; combinable with all FSS200 clamp-on sensor types
Process values (primary) 

Volume flow

Mass flow

Standard volume flow

Flow velocity

Speed of sound

Liquident detection

Totalizer 1, 2 and 3

HART or Modbus RTU; compatible with SIMATIC PDM; USB service port
Data logger

4GB SD card, expandable to 32 GB

Data logging in table format (.csv) for: measurement data, alarms, incidents, firmware updates

Logging interval programmable from 1s – 24 hours

I/O options

3 in/outputs: channel 2, 3 and 4: 4-20 mA active/passive, status output, relay 

Inputs channel 5 and 6 on external SITRANS FS DSL: 2 x temperature PT100/500/1000 or 2 x analogue (temperature and pressure) 

Full-graphic display, 240 x 160 pixel, backlit
Power supply
24 V DC / 90 – 240 VAC
UL, cUL, CE, ATEX, FM, and more
Measuring accuracy
 ≥ 0,3%
Flow range
Liquids ±12 m/s (±40 ft/s), gas, ±40 m/s and more; bidirectional
Pipe diameters
12,7 mm to 10 m (0.5" to 394")

Typical applications: Drinking water supply, water networks, cooling water in power plants, chemical liquids (Ex areas possible), crude oil providers and pipeline operators (product and margin detection, leakage detection, pig runs), gas transport, and gas providers in high pressure grids


Industry-focused articles

Start-up videos

This 3-part video series will walk you through setting up the SITRANS FS230 clamp-on ultrasonic flow meter. Through the use of a display simulator, you will learn the specifics of setting up the flow and piping conditions as well as the flow and totalization outputs.
USA | Virtual Solutions Center

See Siemens flow meters in action at the Virtual Solutions Center!

The Siemens Virtual Process Automation Solutions Center brings the world of process measurement and control to you – and there's no travel required. "Walk" through our interactive 360-degree technology showcase to learn about innovative solutions for your process plant, including clamp-on ultrasonic flow meters and other instrumentation, apps for remote monitoring and support, next-generation distributed control systems, and much more.

Downloads, support & services

Find downloads, support and services for SITRANS FS230 clamp-on ultrasonic flow meters.
Support Request - Siemens USA

The fastest way to the experts

Proposed solutions for your queries and direct access to our experts in Technical Support.

Service offers - Siemens USA

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 - Siemens USA

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.

Process Instrumentation training - Siemens USA

Well trained for excellent handling

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

Process Safety - Siemens USA

Process Safety

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.

USA | Technical Support Contact Info

How can we help you? 

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.

Customer Support: 1-800-333-7421

Contact Us