Endress Hauser AG

- Model FMU41 - Ultrasonic Measurements Time-of-Flight

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Cost effective device for sophisticated level measurement in liquids and bulk solids for up to 8m. The Prosonic FMU41 sensor is suited for non-contact level measurement in fluids, pastes, coarse bulk material and flow measurement in open channels or at weirs. The two-wire or four-wire compact transmitter can be used in applications with storage tanks, agitators, on stockpiles and conveyor belts. The envelope curve can be shown on the on-site display for simple diagnosis. Linearization function (up to 32 points) for conversion of the measured value into any unit of length, volume or flow rate.

  • Reliable non-contact measurement

  • Quick and simple commissioning via menu-guided on-site operation with four-line plain text display, 7 languages selectable

  • Envelope curves on the on-site display for simple diagnosis

  • Hermetically sealed and potted sensor

  • Chemically resistant sensor out of PVDF

  • Calibration without filling or discharging

  • Integrated temperature sensor for automatic correction of the temperature dependent sound velocity

Two-wire or four wire instrument for continuous non-contact level and flow measurement.

  • Process connection: Thread

  • Temperature: -40 to +80°C (-40 to +176°F)

  • Pressure: +0.7 to +3bar (+10 to +44psi)

  • Maximum measuring distance: Liquids 8m (26ft), Solids 3.5m (11ft)

  • Blocking distance: Liquids and Solids 0.35m (1.15ft)

  • International explosion protection certificates

Continuous / Liquids

  • Measuring principle

    Ultrasonic

  • Characteristic / Application

    Compact ultrasonic transmitter

  • Supply / Communication

    2/4-wire (HART), PROFIBUS PA, FOUNDATION Fieldbus

  • Accuracy

    +/- 2 mm or +/- 0,2 % of set measuring range

  • Ambient temperature

    -40 °C ... 80 °C
    (-40 °F ... 176 °F)

  • Process temperature

    -40 °C ... 80 °C
    (-40 °F ... 176 °F)

  • Process pressure absolute / max. overpressure limit

    0.7 bar ... 3 bar abs
    (10 psi ... 44 psi)

  • Main wetted parts

    PVDF

  • Process connection

    G / NPT 2'

  • Blocking distance

    0.35 m (1.15 ft)

  • Application
  • Max. measurement distance

    8 m (26 ft)

  • Communication

    4 ... 20 mA HART
    PROFIBUS PA
    FOUNDATION Fieldbus

  • Certificates / Approvals

    ATEX, FM, CSA, TIIS, INMETRO, NEPSI

  • Application limits

    For higher resistance:

    FMU42/FDU9x

    Foam / high turbulence possible:

    FMU42/FDU91

    Fast filling and discharging rate:

    FMU90 + FDU9x

    Level limit detection:

    FMU90 + FDU9x

Continuous / Solids

  • Measuring principle

    Ultrasonic

  • Characteristic / Application

    Compact ultrasonic transmitter

  • Supply / Communication

    2/4-wire (HART), PROFIBUS PA, FOUNDATION Fieldbus

  • Accuracy

    +/- 2 mm or +/- 0,2 % of set measuring range 1)

  • Ambient temperature

    -40 °C ... 80 °C
    (-40 °F ... 176 °F)

  • Process temperature

    -40 °C ... 80 °C
    (-40 °F ... 176 °F)

  • Process pressure absolute / max. overpressure limit

    0.7 bar ... 3 bar abs
    (10 psi ... 44 psi)

  • Main wetted parts

    PVDF

  • Process connection

    G / NPT 2'

  • Blocking distance

    0.35 m (1.15 ft)

  • Max. measurement distance

    3.5 m (11 ft)

  • Communication

    4 ... 20 mA HART
    PROFIBUS PA
    FOUNDATION Fieldbus

  • Certificates / Approvals

    ATEX, FM, CSA, TIIS, INMETRO, NEPSI

  • Application limits

    Take notice of range diagram

Liquids

  • Measuring principle

    Ultrasonic

  • Product headline

    Compact ultrasonic measuring instrument
    Cost effective solution for open channels

  • Max. measurement error

    Low accuracy

  • Measuring range

    Measuring distance 0,4...8m [1.3...26ft]

  • Max. process pressure

    atm.

  • Medium temperature range

    -40°C...80°C
    (-40°F...176°F)

  • Degree of protection

    IP68

  • Outputs

    4...20mA(Hart),PA,FF

  • Inputs

    2-wire 16-36V DC
    4-wire 16-36V DC
    90-253V AC 50/60Hz

  • Digital communication

    PROFIBUS PA, FOUNDATION Fieldbus

  • Hazardous area approvals

    ATEX, FM, CSA

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