KROHNE OPTIWAVE 5400 24 GHz Radar Level Transmitter
Overview of the KROHNE OPTIWAVE 5400
The KROHNE OPTIWAVE 5400 is a two-wire, loop-powered non-contact radar level transmitter for liquids, pastes and slurries. Working in the 24–26 GHz K-band with FMCW technology, it is designed by KROHNE for liquids in basic process applications: storage, process and batch tanks up to 100 m high, as well as open-air measurements on dams and rivers. With ±2 mm accuracy, HART 7 and SIL 2/3 certification, it offers a dependable measurement without contact with the product and without moving parts.
Seven Star LLC supplies the KROHNE OPTIWAVE 5400 to utilities, oil and gas operators and process plants across the Sultanate of Oman and the GCC. As a trusted supplier with engineering support in Muscat, we size the antenna to the nozzle and tank height, confirm the flange standard and Ex approval, and provide the KROHNE handbook with each offer.
Measuring Principle
The KROHNE OPTIWAVE 5400 emits a high-frequency signal whose frequency increases linearly during each measurement phase, known as the frequency sweep. The signal is reflected by the product surface and received after a delay that equals twice the distance divided by the speed of light. Because the frequency has moved on in the meantime, the difference between the transmitted and received frequency is directly proportional to distance. The converter transforms this difference into a spectrum with a Fast Fourier Transform and calculates level as tank height minus measured distance; volume and mass are available as secondary values.
For liquids with a dielectric constant of 1.4 or higher the device measures in direct mode. When the dielectric constant is lower, the TBF Auto and Full TBF modes evaluate the reflection from a flat tank bottom or a reference plate, so even light hydrocarbons can be measured. Tank Bottom Management algorithms filter irregular reflections from an empty vessel, and an empty-tank spectrum function suppresses false echoes from internals. Being non-contact, the KROHNE OPTIWAVE 5400 is not affected by product density or conductivity and has no wetted moving parts to maintain.
Engineering Design of the KROHNE OPTIWAVE 5400
The signal converter sits in a polyester-coated aluminium housing, with 316L stainless steel as an option, rated IP66/IP68 and NEMA 4X/6. A backlit 128 × 64 pixel LCD with a four-button keypad can be operated with a bar magnet, so settings can be changed without opening the cover in a hazardous area. The wiring uses an M20 × 1.5 entry as standard, with ½ NPT or a four-pin M12 connector as alternatives, and the device is supplied from 12 to 30 V DC in non-Ex and Ex i versions.
Two antenna families are available. The 316L Metallic Horn antenna comes in sizes from DN40 to DN200 with an optional purging connection for sticky media, while the PP Drop antenna has an ellipsoidal, smooth surface that resists condensation and build-up and achieves a 5° beam angle at DN150. Antenna extensions adapt the instrument to long nozzles, and a DN65 horn version is designed for mounting on the KROHNE BM 26 A magnetic level indicator. Process connections include G and NPT threads and EN 1092-1, ASME B16.5 and JIS flanges.
Key Features
The KROHNE OPTIWAVE 5400 brings the following capabilities, as documented in the KROHNE handbook:
- FMCW radar in the 24–26 GHz band with a maximum measuring range of 100 m using DN150 or DN200 antennas.
- Accuracy of ±2 mm up to 10 m, ±0.02 % of distance beyond 10 m, 1 mm resolution and ±1 mm repeatability.
- Fast tracking of level changes up to 60 m/min for process and batch vessels.
- Output options of 4–20 mA with HART 7, PROFIBUS PA or FOUNDATION Fieldbus H1 with PID and integrator blocks.
- SIL 2/3 certification according to EN 61508, with SIL 3 achievable in a 1oo2 homogeneous redundant set-up.
- Metallic Horn antenna in 316L for up to +130 °C, or PP Drop antenna with PP flange plate protection for corrosive liquids.
- NAMUR NE 107 diagnostics, with PACTware, HART DD and DTM files provided free of charge.
- Optional NACE MR0175/MR0103/ISO 15156 construction and ASME B31.3 code compliance.
Industrial Applications
KROHNE names fuels, hydraulic oils and other hydrocarbons in the petrochemical and oil and gas industries, alcohols, solvents, acids, bases and lime slurry in chemical plants, and process and cooling water in the power industry as typical media. In Oman, the KROHNE OPTIWAVE 5400 is a natural fit for diesel and fuel storage at power stations and terminals, produced-water and chemical injection tanks at oil fields, and dosing tanks in water treatment and desalination plants along the Batinah coast. The PP Drop antenna handles condensing atmospheres in hot climates, where the 316L horn may also be purged to keep the antenna clean.
For larger industrial projects in Sohar, Duqm and Salalah, Seven Star LLC supplies the KROHNE OPTIWAVE 5400 together with related level and flow instruments. Engineers comparing technologies can also consider the KROHNE OPTIWAVE 7500 80 GHz radar, the VEGA VEGAPULS 6X radar sensor or the VEGA VEGAPULS 64 radar level sensor, and for interface duties
the KROHNE OPTIFLEX 7200 guided radar
.Technical Specifications of the KROHNE OPTIWAVE 5400
The following specifications of the KROHNE OPTIWAVE 5400 are taken from the KROHNE handbook MA OPTIWAVE 5400 C R04 (03/2023), chapter 8 Technical data.
| Parameter | Specification |
|---|---|
| Model | KROHNE OPTIWAVE 5400 C |
| Measuring principle | 2-wire loop-powered FMCW radar |
| Frequency range | K-band, 24–26 GHz |
| Application | Level of liquids, pastes and slurries |
| Maximum measuring range | 15 m (DN40 horn) to 100 m (DN150/DN200 antennas) |
| Accuracy | ±2 mm up to 10 m; ±0.02 % of distance above 10 m |
| Beam angle | 17° (DN40 horn) to 5° (DN200 horn, DN150 Drop) |
| Process temperature | −50 to +130 °C (horn); −40 to +100 °C (PP Drop) |
| Process pressure | −1 to 16 barg |
| Ambient temperature | −40 to +80 °C |
| Dielectric constant | ≥1.4 direct mode; ≥1.1 TBF mode |
| Outputs | 4–20 mA HART 7.4; PROFIBUS PA; FOUNDATION Fieldbus H1 |
| Power supply | 12–30 V DC (non-Ex / Ex i) |
| Materials | Housing aluminium or 316L; antenna 316L or PP |
| Process connections | G 1–1½ A, NPT; EN DN40–200, ASME 1½–8 in, JIS 40–200A |
| Ingress protection | IP66/IP68, NEMA 4X/6 |
| Approvals | ATEX, IECEx, cQPSus and others; SIL 2/3 |
How to Order
Send Seven Star LLC an RFQ for the KROHNE OPTIWAVE 5400 with the liquid, its dielectric constant, tank height, nozzle size and length, process pressure and temperature, preferred antenna and output protocol, and the required Ex approval. Our instrumentation division in Muscat will confirm the order code and the current lead time. The KROHNE handbook with full technical data can be downloaded from this page, and our engineers support customers in Oman and the GCC through installation and commissioning.
- Instruction Manual KROHNE OPTIWAVE 5400 C Handbook incl. Technical Data (MA R04, 03/2023) Download
KROHNE product families on this page
KROHNE names its instruments by measuring principle, which makes a tag list easy to read:- OPTIFLUX and WATERFLUX: electromagnetic flowmeters, such as OPTIFLUX 2300, OPTIFLUX 4300 and WATERFLUX 3070 for water networks
- OPTISONIC and ALTOSONIC: ultrasonic flowmeters, including the inline OPTISONIC 3400, the clamp-on OPTISONIC 6300, the OPTISONIC 7300 for gas and the ALTOSONIC V12 for custody transfer of gas
- OPTIMASS: Coriolis mass flowmeters such as OPTIMASS 1400 and 6400
- H250 M40 and DK800: variable area flowmeters
- OPTIWAVE and OPTIFLEX: radar and guided radar level transmitters
Where KROHNE flowmeters and level transmitters are used
Typical duties in the GCC are produced water and injection water metering, potable water and wastewater networks, fuel gas and sales gas measurement, chemical dosing, and tank level in terminals and process units. Coriolis meters cover mass flow and density on hydrocarbons, while electromagnetic meters need a conductive liquid.Ordering KROHNE instruments: what we need
Send the full type code and serial number from the nameplate, or a clear photo of it. For a new KROHNE flow meter we need line size and flange rating, liner and electrode material for electromagnetic types, fluid, flow range, pressure and temperature, power supply, output and protocol, and the hazardous area approval required. We check the code against KROHNE documentation before quoting and provide the manufacturer's datasheet and certificates on request.Browse KROHNE products by category: Flowmeters, Level Transmitter, Flow Computers.
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