Differential pressure
Deltabar FMD78

Differential pressure transmitter with two diaphragm seals for differential pressure and level

FMD78 -

Compare

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...40bar
(1.5psi ... 600 psi)
Process pressure / max. overpressure limit

160bar (2400 psi)
Main wetted parts

Alloy C276
316L
Monel
Tantalum
Max. measurement distance

400m (1312ft) H2O
Material process membrane

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

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

See all specifications

Field of application

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.

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 +40 bar (1.5 to 600psi)
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
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)

Videos

00:00

Pressure measuring principle
00:00

The new TempC Membrane

Extended selection

High-end products
Highly functional and convenient

Technical excellence

Simplicity

What is FLEX?

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

Learn more about the FLEX selections

Loading alternative products

Predecessor

Deltabar S FMD633

Success stories

Simple and efficient level measurements in silos

Simple and efficient level measurement in silos with the product familiy Micropilot FMR10B, FMR20B and FMR30B
Read the full story
Simple and efficient level measurements in sewer systems

Simple and efficient level measurements in sewer systems with the product familiy Micropilot FMR10B, FMR20B and FMR30B
Read the full story
Simple and efficient level measurements in open channels

Simple and efficient level measurements in open channels with the product familiy Micropilot FMR10B, FMR20B and FMR30B
Read the full story
Reliable level measurements in bunker and stockpiles

Simple and efficient level measurements in in bunker and stockpiles with the product familiy Micropilot FMR10B, FMR20B and FMR30B
Read the full story
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

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
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 / 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
Successor

PMD78B
Application limits

Measuring cell:
Metal welded

We value your privacy

We use cookies to enhance your browsing experience, collect statistics to optimize site functionality, and deliver tailored advertisements or content.

By selecting "Accept all", you consent to our use of cookies.
For further details please review our cookie policy .

	EN	More
01/04/2024
04/01/2022
03/12/2020
23/11/2020
01/04/2020

Language:	English
Version:	01/04/2024
File size:	3.7 MB
File name:	TI00382PEN_3524-00.pdf

	EN	Select other language
06/12/2024
25/03/2024
15/09/2023
28/10/2021
30/07/2021

Language:	English
Version:	06/12/2024
File size:	1.3 MB
File name:	TI00426FEN_2624.pdf

	EN	Select other language
01/04/2024
04/01/2022
03/12/2020
23/11/2020
01/04/2020

	EN	Select other language
03/04/2017
10/12/2014
07/05/2014
30/04/2013
01/10/2011

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

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

	EN	Select other language
10/12/2014
07/08/2013
01/10/2011
15/05/2008
01/06/2007

Differential pressureDeltabar FMD78

Differential pressure transmitter with two diaphragm seals for differential pressure and level

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

Simple and efficient level measurements in silos

Simple and efficient level measurements in sewer systems

Simple and efficient level measurements in open channels

Reliable level measurements in bunker and stockpiles

Optimized logistics concept for tank systems

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

Process connection hygienic

Material process membrane

Material gasket

Fill fluid

Material housing

Communication

Certificates / Approvals

Safety approvals

Design approvals

Hygienic approvals

Marine approvals

Specialities

Successor

Measuring principle

Characteristic / Application

Specialities

Supply / Communication

Accuracy

Long term stability

Ambient temperature

Process temperature

Process pressure / max. overpressure limit

Pressure measuring range

Main wetted parts

Process connection

Process connection hygienic

Max. measurement distance

Communication

Certificates / Approvals

Safety approvals

Design approvals

Hygienic approvals

Marine approval

Options

Successor

Application limits

Back

TI Deltabar S PMD75, FMD77, FMD78

TI Weld-in adapter, process adapter and flanges

TI Deltabar S PMD75, FMD77, FMD78

Cerabar S / Deltabar S / Deltapilot S, Description of device functions FOUNDATION Fieldbus V 04.00.zz

Cerabar S /Deltabar S /Deltapilot S Description of device functions PROFIBUS PA V04.01.zz

Deltabar S FMD77/78; PMD75 PROFIBUS PA (V 04.01.zz) Operating Instructions

Deltabar S FMD77, FMD78, PMD75 HART V02.30.zz Operating Instructions

Deltabar S FMD77/78; PMD75 FOUNDATION Fieldbus (V 04.00.zz) Operating Instructions

Differential pressure
Deltabar FMD78