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
  • PACTwareTM, 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 type Level transmitter
Measurement principles Radar
Level measurement type Continuous measurement
Measured media Liquids, Pastes, Slurries
Contact to measured medium No
Interface measurement No
Measuring range (liquids) 0…100 m/
0…328 ft
Process pressure (relative) -1…16 barg/
-14.5…232 psig
Pressure ratings EN (1092-1): PN40
ASME (B 16.5): Cl 300#
JIS (B 2220): 10k
Process temperature -50…130°C/
Ambient temperature -40…80°C/
Wetted parts Polypropylene (PP), Austenitic stainless steel (1.4404/316L)
Process seals EPDM, FKM/FPM, Kalrez® 6375
Accuracy (liquids) ±2 mm/
±0.08 in


Certificates/Approvals Ex IECEx, NEPSI, cQPSus, EAC, ATEX
Certificates/Approvals Others CRN
Ingress protection NEMA4X/6P, IP66/68
NAMUR compliance NE 21, NE 53, NE 43, NE 107


Digital outputs HART®
Analogue outputs Current (mA)

Process connections

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

Download Center

  • Technical datasheets and handbooks
  • Flyers and brochures
  • Certificates and approvals
  • Software and driver
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