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DeltabarModel FMD78 -Differential Pressure Transmitter

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Differential pressure transmitter with two diaphragm seals for differential pressure and level. The Deltabar FMD78 differential pressure transmitter with metal sensor uses two capillary diaphragm seals. Typically used in process and hygiene applications for continuous measurement of pressure differences in liquids, vapors, gases and dusts. The integrated HistoROM data module makes the management of process and device parameters easy. Designed according to IEC 61508 for use in SIL3 safety applications.

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  • Large variety of different process connections and membrane materials

  • New TempC Membrane for diaphragm seals: Minimum temperature effects and short recovery times

  • Highest safety due to gas tight feedthrough with capabilities up to SIL2/3, certified to IEC 61508

  • Easy menu-guided commissioning via local display, 4 to 20 mA with HART, PROFIBUS PA, FOUNDATION Fieldbus

  • HistoROM data management concept for fast and easy commissioning, maintenance and diagnostics

  • Cost savings with modular concept for easy replacement of sensor, display or electronics

  • Seamless and independent system integration (HART/PA/FF)

For differential pressure, level, volume or mass measurement in liquids.

  • Process connections: Threads, flanges, pancake and hygienic connections

  • Process temperature: -70 up to +400°C (-94 to +752°F)

  • Measuring ranges: 100mbar to +16bar (1.5 to 240psi);

  • Accuracy: ±0.075%

  • International explosion protection certificates, overfill prevention WHG, hygienic approvals, marine approvals, SIL

  • Measuring principle

    Differential pressure

  • Characteristic / Application

    Digital transmitter with metallic measuring diaphragms diaphragm seals and capillaries
    Modular transmitter
    Long term stability
    Enhanced safety via self diagnostic functions
    Secondary process barrier

  • Specialities

    TempC membrane

  • Supply / Communication

    4...20 mA HART:
    10,5...45V DC
    Ex ia: 10,5...30V DC
    PROFIBUS PA /
    FOUDATION Fieldbus:
    9...32V DC

  • Accuracy

    0,075% + influence of diaphragm seal

  • Long term stability

    0,05% of URL/year

  • Ambient temperature

    -50°C...85°C
    (-58°F...185°F)

  • Process temperature

    -40°C...400°C
    (-40°F...752°F)

  • Process pressure absolute / max. overpressure limit

    160bar (2400 psi)

  • Pressure measuring range

    100mbar...40bar
    (1.5psi ... 600 psi)

  • Main wetted parts

    Alloy C276
    316L
    Monel
    Tantalum

  • Process connection

    Diaphragm seal (Pancakes, threads)
    Flanges (DIN, ASME)
    Tri-Clamp ISO2852
    Hygienic connections

  • Process connection hygienic

    Tri-Clamp

    DIN11851

    NEUMO

    Varivent

    SMS

    DRD

    Universal adapter

  • Max. measurement distance

    400m (1312ft) H2O

  • Communication

    4...20 mA HART
    PROFIBUS PA
    FOUNDATION Fieldbus

  • Certificates / Approvals

    ATEX, FM, CSA, CSA C/US, IEC Ex, INMETRO, NEPSI, EAC

  • Safety approvals

    SIL

  • Design approvals

    EN10204-3.1

    NACE MR0175, MR0103

  • Hygienic approvals

    3A, EHEDG

  • Marine approval

    GL/ ABS

  • Options

    HistoROM/M-Dat
    4-line digital display
    SS- or Aluminiumhousing
    Separate housing

  • Application limits

    Measuring cell:

    Metal welded