USA - SITRANS FS230 clamp-on ultrasonic flow meter

Clamp-on Ultrasonic Flow System

SITRANS FS230 digital clamp-on ultrasonic flow system includes the SITRANS FST030 transmitter and proven-in-use FSS200 sensors. These sensors are ideal for typical applications or for challenging hazardous areas the external electronics module SITRANS FS DSL may be used. The FS230 provides rugged and industry-leading performance with cost savings in both purchasing and operation. It 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. 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.

SITRANS FS230 Catalog Specifications

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For more than 40 years, Siemens has set new standards in clamp-on flow measurement. They key to optimal signal transmission is a harmonious interplay of the ultrasonic sensors and the pipe wall. Lambwave sensors transmit the signal waves in the resonance range of the pipe, our Wide Beam technology achieves an even more accurate adjustment to the application and pipe characteristics. Especially in difficult conditions, such an exact adjustment to flow characteristics is the key to highly precise measurements.


SITRANS FS230 with Ex Approval

Built to meet the toughest demands of the hydrocarbon industry.


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
  • 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 (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 


External Digital Sensor Link (DSL) Released
Download Press Release

Wallmount enclosure: die-cast aluminium, painted, wall or standpipe mounting options, IP65/NEMA 4X
Optional external DSL: die-cast aluminium, painted, IP68, for use in zone 0/1
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.


Featured articles

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

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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.

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