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Vortex flowmeters

ENG OPTISWIIRL 5080 manual.pdf RUS OPTISWIRL 5080 технические характеристики.pdf RUS OPTISWIRL 2100 руководство по эксплуатации.pdf ENG OPTISWIIRL 2100 technical characteristics.pdf RUS OPTISWIRL 4200 руководство по эксплуатации.pdf ENG OPTISWIIRL 4200 technical characteristics.pdf RUS OPTISWIRL 5080 руководство по эксплуатации.pdf ENG OPTISWIIRL 5080 technical characteristics.pdf ENG OPTISWIIRL 2100 manual.pdf RUS OPTISWIRL 2100 технические характеристики.pdf ENG OPTISWIIRL 4200 manual.pdf RUS OPTISWIRL 4200 технические характеристики.pdf

The OPTISWIRL series from KROHNE consists of reliable vortex flowmeters for measuring the flow of liquids, (wet) gases, saturated and superheated steam. They feature integrated pressure and temperature compensation, energy calculation capabilities, and Advanced Vortex Frequency Detection (AVFD) technology for stable operation in challenging conditions. The series includes models such as OPTISWIRL 4200 (with P+T compensation for energy management), OPTISWIRL 2100 (cost-effective option for basic applications), and OPTISWIRL 5080 (for high temperatures up to +427°C). The instruments are SIL2/3 certified for safety instrumented systems (SIS) and are ideal for the energy sector.

Operating Principle

The flowmeters operate based on the Karman vortex street principle: the medium flows past a bluff body (vortex shedder), generating vortices on both sides. The frequency of vortex shedding is proportional to the flow velocity. A piezoelectric sensor detects these vortices, and the electronics process the signal with adaptive filtering (AVFD). In compensated models (e.g., 4200), integrated pressure and temperature sensors enable direct calculation of mass flow, normalized volume, and thermal energy (gross/net heat).

Key Features

  • Measurable media: liquids, gases, steam (saturated/superheated, wet).

  • Temperature: up to +240°C (4200/2100), up to +427°C (5080).

  • Sizes: DN15…300 (½…12"), flanged/sandwich/flangeless connections.

  • Pressure: up to PN160 / ASME Cl 1500 (depending on model).

  • Output signals: 2-wire 4…20 mA/HART®7, Foundation Fieldbus, Profibus-PA, Modbus.

  • Accuracy: typically ±0.75–1.5% for liquids/gases, ±1–2% for steam.

  • Additional features: integrated reducer for low flows and large diameters, remote version (up to 50 m), dual-sensor version for redundancy, on-site verification with OPTICHECK.

  • Protection: IP66/67, explosion-proof versions, SIL2/3.

Main Applications

  • Energy and energy management systems (steam, condensate, and thermal energy measurement).

  • Auxiliary processes in industrial plants: steam supply, compressed air, nitrogen, water.

  • Automated safety instrumented systems (SIS), internal energy accounting.

  • High-temperature industries (5080): chemical, petrochemical, metallurgy.

  • General utilities in food, pharmaceutical, water treatment, and other sectors requiring reliability in harsh conditions (vibrations, pulsations, wet gases).

About KROHNE Company

KROHNE Group is a German family-owned manufacturer of industrial automation instruments and measurement technology, founded in 1921 by Ludwig Krohne in Duisburg (Germany). The company started with producing variable area flowmeters for the metallurgy industry and today is a global leader in flow, level, pressure, temperature, and process analytics measurement. With over 4,100 employees, 16 production sites in 11 countries, and representatives in more than 100 countries, KROHNE is renowned for innovations (e.g., the first Coriolis flowmeters with straight tubes), high quality, and independence — the company reinvests most of its profits and remains family-owned for over 100 years.