E+H Prosonic FDU93 Ultrasonic Level Transmitter

The FDU93 ultrasonic sensor for continuous, non-contact and maintenance-free level measurement of fluids, pastes, sludges and powdery to coarse bulk materials. But also for flow measurement in open channels and measuring weirs. The measurement is unaffected by dielectric constant, density or humidity and also unaffected by build-up due to the self-cleaning effect of sensors. Suited for explosion hazardous areas. Maximum measuring range in liquids 25m (85ft), solids 15m (50ft).

  • Integrated temperature sensor for Time-of-Flight correction. Accurate measurements are possible, even if temperature changes are present
  • Suited for rough ambient conditions thanks to separate installation from the transmitter (up to 300m)
  • Reduced build-up formation because of the self-cleaning effect
  • Integrated automatic sensor detection for transmitters FMU90/FMU95 for simple commissioning
  • Weather resistant and flood-proof (IP 68)
  • Non-contact measurement method minimizes service requirements
  • International Dust-Ex and Gas-Ex certificates available

Sensor for continuous, non-contact level measurement of fluids and of bulk materials in silos, on belts, stockpiles and in crushers. Also for flow measurement in open channels and at weirs. Typically used in measurements in low structural heights.

  • Process connection: Thread
  • Temperature: -40 to +95°C (-40 to +203°F)
  • Pressure: +0.7 to +3bar (+10 to +43psi)
  • Maximum measuring range: Liquids 25m (85ft), solids 15m (50ft)
  • Blocking distance: 0.6m (2ft)
  • International explosion protection certificates
  • Measuring principle


  • Characteristic / Application

    Separated version with field housing or top hat rail housing for control cabinet instrumentation, 300m in-between sensor and transmitter

  • Supply / Communication

    4-wire (HART , Profibus DP)

  • Accuracy

    +/- 2mm + 0.17% of measured distance

  • Ambient temperature

    -40 °C … 95 °C
    (-40 °F … 203 °F)

  • Process temperature

    -40 °C … 95 °C
    (-40 °F … 203 °F)

  • Process pressure absolute / max. overpressure limit

    0.7 bar … 3 bar abs
    (10 psi … 43 psi)

  • Main wetted parts

    UP (unsaturated polyester)
    Silicon / Al PTFE coated

  • Process connection

    G / NPT 1″

  • Blocking distance

    0.6 m (2 ft)

  • Max. measurement distance

    15 m (50 ft)

  • Communication

    4 … 20 mA HART
    Profibus DP

  • Certificates / Approvals


  • Options

    Second 4…20mA output

  • Components


Download : Prosonic S FDU90,91,91F,92,93,95 Technical Information,Operating Instructions

Alignment Unit FAU40 Technical Information

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