Differential pressure Deltabar FMD78

  • Measuring principle

    Differential pressure

  • Characteristic

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

  • Supply voltage

    4…20 mA HART
    10,5…45V DC (Non Ex):
    Ex ia: 10,5…30V DC
    PROFIBUS PA:
    9…32 V DC (Non Ex)
    FOUNDATION Fieldbus:
    9…32 V DC (Non Ex)

  • Reference Accuracy

    0,075% + influence of diaphragm seal

  • Long term stability

    0.08 % of URL/ year
    0.14 % of URL/ 5 years
    0.27 % of URL/ 10 years

  • Process temperature

    -70°C…400°C
    (-94°F…752°F)

  • Ambient temperature

    -50°C…85°C
    (-58°F…185°F)

  • Measuring cell

    100 mbar…40 bar
    (40 inH2O…600 psi)

  • Smallest calibratable span

    5 mbar (0.075 psi)

  • Vacuum resistance

    50 mbar (0.73 psi)

  • Max. Turn down

    100:1

  • Max. overpressure limit

    160 bar
    (2400 psi)

  • Process connection

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

  • Process connection hygienic

    Tri-Clamp
    DIN11851
    NEUMO
    Varivent
    SMS
    DRD
    Universal adapter

  • Material process membrane

    316L, AlloyC,
    Tantal,
    Gold-Rhodium
    PTFE

  • Material gasket

    None, diaphragm seal welded

  • Fill fluid

    Silicone oil,
    Inert oil,
    Vegetable oil
    Low- temperature oil
    High- temperature oil

  • Material housing

    316L, Die-cast aluminum

  • Communication

    4…20 mA HART
    PROFIBUS PA
    FOUNDATION Fieldbus

  • Certificates / Approvals

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

  • Safety approvals

    SIL

  • Design approvals

    NACE MR0175
    EN10204-3.1

  • Hygienic approvals

    3A, FDA

  • Marine approvals

    GL/ ABS

  • Specialities

    Diagnostic functions
    TempC Membrane

  • Successor

    PMD78B

  • 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

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