Marine and ShipbuildingVarious fluids flowing through thousands of meters of pipework, pipes that just cannot be opened and measuring points that are out of reach. These circumstance make it extremely difficult to perform permanent or point measurements with conventional measurement systems on commercial and military ships.

In the early 1980’s engineers realised that there was a need for a portable tool to determine the flow rates of water, cooling liquids and fuels around the various on-board systems during the later stages of commissioning. For this reason several institutions started working on the prototypes of the early generation of clamp-on flowmeters. Since then the technology has improved dramatically.


  • Stationary flowmeters for permanent measurements
  • Portable flowmeters for point measurements
  • Non-invasive: Measuring from the outside of the pipe (no process interruptions)
  • Advanced transit-time technology
  • Highly accurate

Several of our ultrasonic flowmeter devices allow readings to be taken simultaneously, reducing cost and also allowing supply and return or differential flow measurements on fuel systems.

Our clamp-on sensors are installed on the outside of the pipe. Therefore there is no pressure loss, no risk of leakage and no interruption of the flow process.

The right ultrasonic flowmeter for any situation; both portable and stationary. Various input and output configurations are possible, as well as bi-directional measurements.

The KATflow 150 is one of our ultrasonic clamp-on flowmeters for fixed installations. This instrument is used by commercial cargo boats to monitor diesel and oil consumption.

Our compact and lightweight KATflow 200 ultrasonic clamp-on flowmeter is used on both commercial ships and naval vessels, including submarines. This portable flowmeter has become a valuable measuring instrument for maintenance work on fuel, oil, water, cooling and heating pipes. In addition, the KATflow 200 plays an important role in the testing of fire extinguishing systems.

  • Fuel and oil consumption metering
  • Control of ballast water systems
  • Inline flowmeter performance verification
  • Inspection of fire extinguisher systems
  • Pump and valve testing and inspection
  • Leakage and blockage detection
  • Consumption measurements
  • IHC
  • Damen Shipyards
  • Wärtsilä
  • Tyco FIS (Marine Divisie)
  • Lloyd’s Register
  • Rosetti Marino
  • Stena Drilling
  • Royal Navy
  • Prosafe

“Our ultrasonic clamp-on flowmeters are used on different types of ships. These can be container ships, cruise ships, ferries, tankers, aircraft carriers as well as luxury yachts.”

KATflow 100 - compacte ultrasone flowtransmitter vaste opstelling | U-F-M b.v.

Standard fixed installation clamp-on ultrasonic flowmeter

Marine en Scheepsbouw - KATflow 150

Advanced fixed installation clamp-on ultrasonic flowmeter

Marine en Scheepsbouw - KATflow 170

Fixed installation clamp-on ultrasonic ATEX flowmeter

Marine en Scheepsbouw - KATflow 200

Hand-held clamp-on ultrasonic flowmeter