OPTISONIC 4400HT Ultrasonic flowmeter for high temperature liquids


  • Applications with high temperatures
  • Various conductive and non-conductive liquids
  • Vacuum distillation and other HT refinery applications
  • Heat transfer circuits
  • Boiler feed water
  • HT feed water in combined power plants
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  • 2-path meter for flow measurement of thermal oil, boiler feed water, crudes and hot feed flows in refineries
  • Up to +600°C / +1112°F
  • Flange: max. DN1000 / 40″
  • 3 x 4…20 mA, HART®7, Modbus, FF, Profibus-PA/DP


  • 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


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