The SITRANS FS230 digital clamp-on ultrasonic flowmeter is a process-optimizing solution for measuring flow in virtually any liquid application. Designed to provide both exceptional performance and outstanding cost savings, the FS230 is an ideal fit for many industries requiring high-quality liquid flow measurement – including water and wastewater, HVAC and power, food and beverage, pharmaceutical, chemical, mining and pulp and paper.

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.


SITRANS FST030 wall-mount transmitter
ConfigurationWall mount enclosure, 1- or 2-path
CommunicationHART 7.5 or Modbus; compatible with SIMATIC PDM
EnclosureIP66/67, NEMA 4X rating
I/OUp to 6 channels combining analog, relay or digital outputs and binary input + RTD
DisplayFull graphical display, 240 x 160 pixels
Power supply20 to 27 V DC, 100 to 240 V AC, 47 … 63 Hz (universal power supply)
ApprovalsUL, ULc, CE
SITRANS FSS200 clamp-on ultrasonic sensors
MediaConductive and non-conductive liquids
Pipe sizes12.7 mm to 10 m (0.5″ to 394″)
Sensor materialsWideBeam®:
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 rangeWideBeam®: -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 materialWideBeam®: Steel and carbon steel
Universal: Most non-steel
High-Temperature: Steel and non-steel
ApprovalsFM, ATEX and IECEX (Zone 0, 1 and 2)


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% of flow rate and repeatability of 0.25% according to ISO 11631
  • Best-in-class 100 Hz data update rate – detects even the smallest, most rapid fluctuations in flow
  • Digital Sensor Link (DSL) – digitizes the signal at the earliest stage of measurement for a strong signal-to-noise ratio and high-precision measurement
  • Simplified installation – multiple setup wizards guide you through every step of commissioning
  • Easy-to-use Human Machine Interface (HMI) – fully graphical display with simple menu navigation and the option to display up to 6 customizable parameters at once