Last Updates: 16/08/2020

E&H Prosonic FDU92 Ultrasonic measurement Time-of-Flight

Part Number: FDU92 Categories: ,
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  • The FDU92 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 20m (65ft), solids 10m (33ft).

    • Integrated temperature sensor for Time-of-Flight correction. Accurate measurements are possible, even if temperature changes are present
    • Hermetically welded PVDF sensor for highest chemical resistance
    • 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)
    • International Dust-Ex and Gas-Ex certificates available

    Sensor for continuous, non-contact level measurement of fluids and 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 +4bar (+10 to +58psi)
    • Maximum measuring range: Liquids 20m (65ft), solids 10m (33ft)
    • Blocking distance: 0.4m (1.3ft)
    • International explosion protection certificates
    • Measuring principle


    • Product headline

      Version with separate transmitter in field housing or top hat rail housing
      Cost effective solution for open channel flow measurement in water / wastewater plants

    • Max. measurement error

      distance measurement: +/- 2mm + 0.17%

    • Measuring range

      max measuring distance up to 20m / 65ft

    • Max. process pressure


    • Medium temperature range


    • Degree of protection


    • Display/Operation


    • Outputs

      4…20mA HART
      Option: second 4…20mA output

    • Inputs


    • Digital communication


    • Hazardous area approvals

      ATEX, IECEx, FM, CSA

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

    Alignment Unit FAU40 Technical Information

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