Krohne - OPTISWIRL 4200

  • For liquids, (wet) gases, saturated and superheated steam (+240°C / +464°F)
  • Integrated P+T measurement: direct output of mass, nominal flow, energy, gross/net heat
  • Flange: DN15…300 / 12…12"; wafer version: max. DN100 / 4"
  • 2-wire, 4…20 mA, HART®

The OPTISWIRL 4200 is a Vortex flowmeter with integrated temperature sensor. It is best suited for flow measurement of liquids, dry or humid gases and saturated or superheated steam in supply processes (auxiliary service) and distribution networks. The device is also the optimum solution for advanced energy management systems (acc. to ISO 50001) as it can be supplied with integrated gross and net heat measurement for steam and condensate. For gas and steam measurements with varying process conditions the Vortex meter can also be equipped with an optional integrated pressure sensor.

Unlike traditional Vortex meters, the OPTISWIRL 4200 is able to combine flow, temperature and pressure measurement as well as flow calculation in just one device. This saves approx. 45% of installation costs and results in a better overall system accuracy. The flowmeter is available with flange connection or in flangeless wafer design. It can also be delivered with integrated nominal diameter reduction and as field mount version (with cable length up to 50 m / 164 ft). The OPTISWIRL 4200 is designed for use in Safety Instrumented Systems (SIS) and has approvals for operation in hazardous areas.

Product Highlights

  • Flange or space-saving sandwich (wafer) version (up to DN100 / 4")
  • Compact all-in-one device for varying process conditions
  • Integrated gross and net heat calculation for steam and hot water
  • Optional shut-off valve to allow replacement of pressure sensor without process interruption
  • Advanced technology for signal filtering (AVFD Advanced Vortex Frequency Detection)
  • Optional integrated reduction of nominal size for increased accuracy
  • Approx. 45% less installation costs compared to Vortex meter with external T and P sensors plus calculator
  • Also available as dual Vortex meter with two independent sensors and converters in one device for redundant measurement and applications with high safety requirements
  • Also available as remote version with field housing for installation of converter 50 m / 164 ft away from the sensor
  • SIL2/3 certified acc. to IEC 61508 (for high, low or continuous mode of operation)
  • On-site verification of flowmeter with service tool OPTICHECK

Typical Applications


  • Utility applications: Energy distribution in auxiliary and supply circuits
  • Measurement of (non-)conductive liquids, gases, saturated and superheated steam
  • Gross/net heat metering of steam and hot water
  • Monitoring of compressor output and evaluation of Free Air Delivery (FAD)
  • Measurement of consumption of industrial gases (natural gas, nitrogen etc.)
  • Measurement of consumption in compressed air systems

Chemical and other process industries

  • Hydrocarbons, thermal oils etc.
  • Solvents
  • Desalinated water
  • Gases, welding gases, steam
  • Petrochemical products (benzene, ethylene, etc.)

Iron, steel and metal industry

  • Cooling circuits oxygen, natural gas, steam
  • Compressed air
  • Inert gases
  • Oxygen
  • Natural gas
  • Steam

Food and beverage industry

  • Purified and desalinated water
  • CO2
  • Burner consumption
  • Steam

Machinery and apparatus (OEM industry)

  • Carrier air etc. (e.g. for sterilisation units, packaging machines etc.)
  • Burner consumption

Wastewater industry, renewable power industry

  • Dry and humid biogas at the inlet of CHP (combined heat and power) systems

Pulp and paper industry

  • Compressed air, steam etc.

Oil and gas industry

  • Petrochemical products (benzene, ethylene, steam, etc.)
  • Natural gas

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