Endress Hauser Differential Pressure Deltabar FMD77 Series

The Differential Pressure Deltabar for Industrial automation

The Endress Hauser Deltabar FMD77 series 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.

Main Features

• 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 fluctuations
• 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)

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An Eye-Opening Guide to Pressure sensor Types

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 safety 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

0.08 % of URL/ year

0.14 % of URL/ 5 years

0.27 % of URL/ 10 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)

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

Specialities

Diagnostic functions

Successor

PMD78B

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 Endress Hauser Deltabar FMD77 series datasheet Catalog  Endress Hauser Deltabar FMD77 series Operating Instruction Catalog