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Ultrasonic measurement
Time-of-Flight
Prosonic FDU93

Prosonic FDU93 ©Endress+Hauser
Prosonic FDU93 ©Endress+Hauser

Time-of-Flight measuring principle

Ultrasonic sensor for level and flow measurement for connection to FMU9x (measuring range up to 25m)

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).

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  • Lợi ích

    • 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-...

  • Phạm vi ứng dụng

    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.

    • ...

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Details

  • Measuring principle

    Ultrasonic

  • 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

    Transmitter:
    4 ... 20 mA HART
    Profibus DP

  • Certificates / Approvals

    ATEX, FM, CSA, IEC Ex, INMETRO, NEPSI, EAC Ex

  • Options

    Second 4...20mA output

  • Components

    Transmitter:
    FMU90

  • Measuring principle

    Ultrasonic

  • Characteristic / Application

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

  • Supply / Communication

    4-wire (HART, Profibus DP)

  • Accuracy

    +/- 2 mm + 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)

  • Application

    Application

  • Max. measurement distance

    Max. measurement distance

  • Communication

    Transmitter:
    4...20 mA HART
    Profibus DP

  • Certificates / Approvals

    ATEX, FM, CSA, IEC Ex, INMETRO, NEPSI, EAC Ex

  • Options

    Second 4...20 mA output

  • Components

    Transmitter:
    FMU90, FMU95

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