Radar (FMCW) level transmitter for liquids in basic process applications

  • Continuous, non-contact level measurement in closed tanks or in the open air
  • 24 GHz radar, Horn or Drop antennas
  • Measuring range: 0…100 m / 328 ft
  • -50…+130°C / -58…+266°F; -1…16 barg / -14.5…232 psig

OPTIWAVE 5400 – Version with Horn antenna and flange connection

Radar (FMCW) level transmitter OPTIWAVE 5400 – Version with Horn antenna and flange connection

The OPTIWAVE 5400 is a 2-wire 24 GHz radar (FMCW) level transmitter for liquids in basic process applications. It is particularly designed for continuous, non-contact level measurement in the chemical, petrochemical as well as oil and gas industry. It can be equipped with a PP Drop antenna for condensing atmospheres and corrosive media but features also Metallic Horn antennas. Due to its high dynamic range, the 24 GHz radar can measure distances up to 100 m / 328 ft.

The OPTIWAVE 5400 provides accurate readings even in processes with fast changing levels, in closed tanks or in open air (e.g. dams, rivers etc.). This level transmitter can be used to upgrade radars in basic applications requiring higher accuracy. It offers flange or thread connections as well as optional antenna extensions to suit any nozzle length. It is approved for hazardous areas and comes with extensive device diagnostics (acc. to NE 107) as well as HART®7 communication.

Product highlights

  • 2-wire, loop-powered, with HART®7
  • PP Drop antenna:
    • Insensitive to condensation
    • Small beam angle (5° with drop antenna DN150 / 6” Drop antenna)
    • Ellipsoidal shape and smooth surface to minimise scaling
    • Flange protection against corrosive media
    • For distances of up to 80 m / 262.5 ft
  • 316L metallic Horn antenna:
    • DN200 / 8” antenna for distances up to 100 m / 328 ft
    • Optional purging system
  • ± 2 mm / 0.08” accuracy
  • Can measure in processes with fast changing levels (≤60 m/min / 196.85 ft/min)
  • Antenna extensions to suit any nozzle length
  • Flange or thread connections
  • Large, backlit LCD screen with 4-button keypad for operation with bar magnet; no need to open the housing cover
  • PACTware™, HART® DDs and DTMs provided free of charge with full functionality
  • Extensive sensor diagnostics (incl. NE 107)
  • 3-year warranty

Typical applications


  • Level measurement in/on storage, process or batch tanks (max. 100 m / 328 ft) and open air applications (dams, rivers etc.)

Chemical Industry

  • Alcohols e.g. methanol, ethanol
  • Solvents, acids, bases
  • Phosphorus
  • Additives
  • Condensate

Petrochemical Industry, Oil and Gas Industry

  • Fuels
  • Hydraulic oils and other hydrocarbons

Power Industry

  • Process and cooling water

Iron, Steel and Metal Industry

  • Molten steel batching

Technical data

Product typeLevel transmitter
Measurement principlesRadar
Level measurement typeContinuous measurement
Measured mediaLiquids, Pastes, Slurries
Contact to measured mediumNo
Interface measurementNo
Measuring range (liquids)0…100 m/
0…328 ft
Process pressure (relative)-1…16 barg/
-14.5…232 psig
Pressure ratingsEN (1092-1): PN40
ASME (B 16.5): Cl 300#
JIS (B 2220): 10k
Process temperature-50…130°C/
Ambient temperature-40…80°C/
Wetted partsAustenitic stainless steel (1.4404/316L), Polypropylene (PP)
Process sealsEPDM, FKM/FPM, Kalrez® 6375
Accuracy (liquids)±2 mm/
±0.08 in


Certificates/Approvals ExATEX, cQPSus, EAC, IECEx, NEPSI
Certificates/Approvals OthersCRN, WHG
Ingress protectionIP66/68, NEMA4X/6P
NAMUR complianceNE 107, NE 21, NE 43, NE 53


Digital outputsHART®
Analogue outputs4…20 mA

Process connections

Flange connectionsEN (1092-1): DN80…200
ASME (B 16.5): 3…8"
JIS (B 2220): 40…200A
Thread connectionsMale:
G1, G1 1/2
1 NPT, 1 1/2 NPT