Differential pressure
Deltabar FMD77

Differential pressure transmitter with one diaphragm seal for level measurement

FMD77

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Deltabar FMD77 temperature isolator short, transmitter vertical

Deltabar FMD77 temperature isolator short, transmitter horizontal

Deltabar FMD77 with two diaphragm seals and a capillary on the low pressure side

Deltabar FMD77 temperature isolator long, transmitter horizontal

Specs at a glance

Accuracy

0,075% + influence of diaphragm seal
Process temperature

-40°C...400°C
(-40°F...752°F)
Pressure measuring range

100mbar...16bar
(1.5psi...230 psi)
Process pressure / max. overpressure limit

160bar (2400 psi)
Main wetted parts

Alloy C276
316L
Monel
Tantalum
Max. measurement distance

160m (525ft) H2O
Material process membrane

316L, AlloyC,
Tantal,
Gold-Rhodium,
PTFE
Measuring cell

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

See all specifications

Field of application

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.

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 certificates, overfill prevention WHG, hygienic approvals, marine approvals, SIL

Benefits

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)

Videos

Pressure measuring principle

Extended selection

High-end products
Highly functional and convenient

Technical excellence

Simplicity

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Simple products
Easy to select, install and operate

Technical excellence

Simplicity

What is FLEX?

Standard products
Reliable, robust and low-maintenance

Technical excellence

Simplicity

What is FLEX?

High-end products
Highly functional and convenient

Technical excellence

Simplicity

What is FLEX?

Specialized products
Designed for demanding applications

Technical excellence

Simplicity

Variable

What is FLEX?

FLEX selections	Technical excellence	Simplicity
F L E X Fundamental selection Meet your basic measurement needs	Technical excellence	Simplicity
F L E X Lean selection Handle your core processes easily	Technical excellence	Simplicity
F L E X Extended selection Optimize your processes with innovative technologies	Technical excellence	Simplicity
F L E X Xpert selection Master your most challenging applications	Technical excellence	Simplicity Variable

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Predecessor

Deltabar S FMD630

Success stories

Optimized logistics concept for tank systems

We implemented a highly effective logistics concept at chemicals distributors Brenntag Schweizerhall AG's Basel site.
Read the full story
Level measurement of silos on construction sites

Discover how Profibaustoffe Austria GmbH automated the monitoring of bulk material inside silos to deliver refills on a "just- in-time" basis.
Read the full story
Time saved, safety increased

Employees of Returkraft regularly have to fulfill and document all requirements of the SIL measuring points in the plant.
Read the full story
Fit for purpose instrumentation for CNG compressors

The Egyptian government is working to replace liquid fuels with natural gas. To achieve this they targeted increasing the number of CNG stations in their country from 306 to 1000 by the end of 2021.
Read the full story
Extend SIL proof test intervals with new Liquiphant FTL51

Discover how our customer CABB was able to extend SIL proof test intervals with the new Liquiphant FTL51
Read the full story

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Accessories

Flushing ring NPS 2" Cl. 150-2500, 316L

Flushing ring NPS 3" Cl. 150-2500, 316L

See more accessories

	EN
03/04/2017
10/12/2014
07/08/2013
01/10/2011
01/05/2010

Language:	English
Version:	03/04/2017
File size:	4.8 MB
File name:	BA00296PEN_1616.pdf

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01/04/2024
04/01/2022
03/12/2020
23/11/2020
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Language:	English
Version:	01/04/2024
File size:	3.7 MB
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01/04/2024
04/01/2022
03/12/2020
23/11/2020
01/04/2020

	EN
01/08/2024
03/04/2017
15/04/2015
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07/05/2014

	EN
11/07/2024
01/03/2018
15/04/2015
10/12/2014
01/11/2014

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10/12/2014
01/11/2014
07/05/2014
17/01/2013

	EN
01/08/2024
03/04/2017
15/04/2015
10/12/2014
07/05/2014

Differential pressureDeltabar FMD77

Differential pressure transmitter with one diaphragm seal for level measurement

Specs at a glance

Accuracy

Process temperature

Pressure measuring range

Process pressure / max. overpressure limit

Main wetted parts

Max. measurement distance

Material process membrane

Measuring cell

Field of application

Benefits

Videos

Extended selection

Predecessor

Success stories

Optimized logistics concept for tank systems

Level measurement of silos on construction sites

Time saved, safety increased

Fit for purpose instrumentation for CNG compressors

Extend SIL proof test intervals with new Liquiphant FTL51

Measuring principle

Characteristic

Supply voltage

Reference Accuracy

Long term stability

Process temperature

Ambient temperature

Measuring cell

Smallest calibratable span

Vacuum resistance

Max. Turn down

Max. overpressure limit

Process connection

Material process membrane

Material gasket

Fill fluid

Material housing

Communication

Certificates / Approvals

Safety approvals

Design approvals

Specialities

Successor

Measuring principle

Characteristic / Application

Supply / Communication

Accuracy

Long term stability

Ambient temperature

Process temperature

Process pressure / max. overpressure limit

Pressure measuring range

Main wetted parts

Process connection

Max. measurement distance

Communication

Certificates / Approvals

Safety approvals

Design approvals

Options

Successor

Application limits

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