Differential pressure
Deltabar FMD77

Deltabar FMD77 temperature isolator short, transmitter vertical ©Endress+Hauser
Deltabar FMD77 temperature isolator short, transmitter horizontal ©Endress+Hauser
Deltabar FMD77 with two diaphragm seals and a capillary on the low pressure side ©Endress+Hauser

Pressure measuring principle

Deltabar FMD77 temperature isolator long, transmitter vertical ©Endress+Hauser
Deltabar FMD77 temperature isolator long, transmitter horizontal ©Endress+Hauser

Differential pressure transmitter with one diaphragm seal for level measurement

The Deltabar FMD77 differential pressure transmitter with metal sensor uses a one-sided diaphragm seal or diaphragm seals on both sides with a capillary on the low pressure side. Typically used in the process industry for continuous level measurement in liquids. 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.

  • Avantajlar

    • Large variety of different process connections and membrane materials

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

    • New TempC Membrane minimizes influences of ambient and process temperature...

  • Uygulama alanı

    For level, volume or mass measurement in liquids.

    • Process connections: Threads and flanges

    • Temperature: -70 to +400°C (-94 to +752°F)

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

    • Accuracy: ±0.075%

    • International explosion protection...

Özellikler ve şartlar

Geri

Details

  • Measuring principle

    Differential pressure

  • Characteristic

    Digital transmitter with metallic measuring diaphragms, one side with diaphragm seal
    Modular transmitter
    Long-term stability
    Secondary process barrier
    enhanced saftey via self diagnostic functions

  • Supply voltage

    4...20mA 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

    0,05% of URL/year
    0,125% of URL/5 years

  • Process temperature

    -40°C...400°C
    (-40°F...752°F)

  • Ambient temperature

    -50°C...85°C
    (-58°F...185°F)

  • Measuring cell

    100 mbar...16 bar
    (40 inH20...240 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

    Low pressure side:
    1/4-18NPT
    RC1/4"
    High pressure side:
    Flanges (DIN, ASME, JIS)

  • 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

  • Safety approvals

    SIL
    WHG/ Overfill prevention

  • Design approvals

    NACE MR0175
    EN10204-3.1

  • Specialities

    Diagnostic functions

  • Measuring principle

    Differential pressure

  • Characteristic / Application

    Digital transmitter with metallic measuring diaphragms one side with diaphragm seal
    Modular transmitter
    Long term stability
    Enhanced safety via self diagnostic functions
    Secondary process barrier

  • Supply / Communication

    4...20 mA HART:
    10,5...45V DC
    Ex ia: 10,5...30V DC
    PROFIBUS PA /
    FOUNDATION 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...16bar
    (1.5psi...230 psi)

  • Main wetted parts

    Alloy C276
    316L
    Monel
    Tantalum

  • Process connection

    Low pressure side:
    1/4-18NPT
    RC1/4"
    High pressure side:
    Flanges (DIN, ASME, JIS)

  • Max. measurement distance

    160m (525ft) 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

  • Options

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

  • Application limits

    Measuring cell:

    Metal welded

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