Ultrasonic flowmeter for high pressure liquids

  • 2-path meter for flow measurement of condensate, high pressure feedwater, spray water or water injection
  • Operating pressure up to 490 bar / 7107 psi
  • Max. DN1000 / 40", up to ASME Cl 4500
  • 3 x 4…20 mA, HART®7, Modbus, FF, Profibus-PA/DP

OPTISONIC 4400 HP – Small high pressure variant (DN25 / 1")

OPTISONIC 4400 HP Ultrasonic flowmeter – Small high pressure variant (DN25 / 1")

The OPTISONIC 4400 HP is a 2-path ultrasonic flowmeter for liquids that are processed under extreme conditions with high operating pressure up to 490 bar / 7107 psi. This makes the flowmeter the perfect choice for accurate flow measurement of condensate and high pressure feed water or spray water measurement at power plants as well as well water injection in upstream oil production.

The dual path design of the flowmeter compensates for variable flow profiles, maintaining unaltered measuring performance. Due its rugged, fully welded construction and its large dynamic range, the OPTISONIC 4400 HP boasts an excellent long-term stability and performs with minimum operational and maintenance costs. The flowmeter comes as compact version or with field converter to be remotely installed. The meter is available with a wide range of materials as well as sizes and can also be used in hazardous areas. Digital communication options and extensive diagnostics round off the functionality of the device.

Product highlights

  • Bi-directional flow measurement over a wide dynamic range
  • Meets the requirements of the oil and gas industry: NACE MR 175/103 and ISO 15156 conformity
  • Independent of flow profile (Reynolds number) and product variations
  • Resistant to corrosive and abrasive products
  • Transducer replacement under process conditions
  • Extensive sensor and process diagnostics (incl. NE 107)
  • Optional heating jacket
  • Welded-end connections on request
  • No periodical maintenance or recalibration needed

Typical applications


  • Applications with high process pressures
  • Various conductive and non-conductive liquids

Oil and gas industry

  • High pressure upstream applications (e.g. well injection)
  • Oil transportation

Conventional and nuclear power industry

  • Heat transfer circuits
  • Boiler feed water
  • HP feed water in combined power plants