E+H Levelflex FMP51 Guided Radar Transmitter

Levelflex FMP51 for level measurement even under extreme process conditions like 
high temperature and high pressure in the process industry. FMP51 offers maximum reliability even in case of moved surface and foam or when numerous tank baffles interfere with the measurement. Levelflex FMP51 is used for continuous level measurement of liquids, pastes and slurries but also for interface measurement. The measurement is not affected by changing media, temperature changes, gas blankets or vapors.

  • Reliable measurement even for changing product and process conditions
  • HistoROM data management concept for fast and easy commissioning, maintenance and diagnostics
  • Highest reliability due to new Multi-Echo Tracking evaluation
  • Hardware and software developed according to IEC 61508 up to SIL3
  • Heartbeat Technology for a cost-effective and safe plant operation during the entire life cycle
  • Seamless integration into control or asset management systems and intuitive, menu-guided operation concept (on-site or via the control system)
  • World’s easiest proof test for SIL and WHG saves time and costs

Version with rod, rope or coax probe.

  • Process connections: Threads or flange
  • Temperature: -50 to +200°C (-58 to +392°F)
  • Pressure: -1 to +40bar (-14.5 to +580psi)
  • Maximum measuring range: Rod 10m (33ft), rope 45m (148ft), coax 6m (20ft)
  • Accuracy: ±2mm (0.08″)
  • International explosion protection certificates, overfill prevention WHG, SIL, marine approval, 5-point linearity protocol
  • Measuring principle

    Guided radar

  • Characteristic / Application

    Premium device

    Rod probe, Rope probe, Coaxial probe

    Integrated data memory, Factory precalibrated, Reliable measuring: in case of moved surface + foam, for changing medias.

  • Interface measurement

    Clean interfaces liquid/ liquid;

    Simultaneous measurement of interface and overall level

  • Specialities

    Heartbeat Technology,

    Bluetooth® commissioning,

    Operation and maintenance SmartBlue App,


    RFID TAG for easy identification

  • Supply / Communication

    2-wire (HART/ PROFIBUS PA/ FOUNDATION Fieldbus)

    4-wire (HART)

    Bluetooth® wireless technology and App (optional)

  • Accuracy

    Rod probe :+/- 2 mm (0.08 in) 

    Rope probe <= 15 m (49 ft): +/- 2 mm (0.08 in)

    Rope probe > 15 m (49 ft): +/- 10 mm (0.39 in)

    Coaxial probe: +/- 2 mm (0.08 in)

  • Ambient temperature

    -50…+80 °C

    (-58…+176 °F)

  • Process temperature

    -50…+200 °C

    (-58…+392 °F)

  • Process pressure absolute / max. overpressure limit

    Vacuum…40 bar 

    (Vacuum…580 psi)

  • Main wetted parts

    Rod probe:

    316L, Alloy C, Ceramic

    Rope probe: 

    316, 316L, Alloy C, Ceramic 

    Coaxial probe:

    316L, Alloy C, Ceramic, PFA

  • Process connection


    G3/4…G1 1/2;

    MNPT 3/4…MNPT1 1/2


    ASME 1 1/2″…8″, 
    DN50…DN 200, 
    JIS 10K

  • Sensor length

    Rod probe: 10 m (33 ft) 

    Rope probe: 45 m (148 ft) 

    Coaxial probe: 6 m (20 ft)

  • Max. measurement distance

    Rod: 10 m (33 ft) Min DK>1.6

    Rope: 25 m…30 m (82ft…98 ft) Min DK>1.6;

    30m…45 m (98ft…148 ft) Min DK>1,9

    Coaxial probe: 6 m (20 ft) Min DK>1.4

  • Communication

    4…20 mA HART 


    FOUNDATION Fieldbus

    Bluetooth® wireless technology

  • Certificates / Approvals


  • Safety approvals

    Overfill prevention WHG


  • Design approvals

    EN 10204-3.1

    NACE MR0175, MR0103

    ASME B31.1, B31.3


  • Marine approval

    GL/ ABS/ LR/ BV/ DNV

  • Options

    Sensor remote with 3 m/ 9 ft cable,

    Gas-tight feed through,

    Remote operation via SmartBlue App using Bluetooth®

  • Application limits

    Horizontal storage tank cyl.: 
    use coax probe

    Corrosive liquids: FMP52

    Interface measurement: Use coax system in favor (coax probe, bypass, stilling well) 

    Interface with emulsion: FMP55

DataSheet: Levelflex FMP51, FMP52, FMP54 Technical Information

Levelflex FMP51 Modbus Technical Information

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