Deltabar FMD78 - Differential Pressure

 

 

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.

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 gastight 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)

  •  

Field of application

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 +16bar (1.5 to 240psi);

  • Accuracy: ±0.075%

  • International explosion protection certificates, overfill prevention WHG, hygienic approvals, marine approvals, SIL

 

Features and specifications

Continuous / Liquids

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
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 -40°C...85°C
(-40°F...185°F)
Process temperature -40°C...400°C
(-40°F...662°F)
Process pressure absolute / 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, IECEx, NEPSI, INMETRO
SIL
NACE
Marine
WHG/ Overfill prevention
EN10204-3.1
3A

 



Pressure:

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...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 -70°C...400°C
(-94°F...752°F)
Ambient temperature -40°C...85°C
(-40°F...185°F)
Measuring cell 100mbar...40bar
(40inH2O...600psi)
Smallest calibratable span 5 mbar (0.075 psi)
Vacuum resistance 50 mbar (7.25psi)
Max. Turn down 100:1
Max. overpressure limit 160bar 
(2400psi)
Process connection Diaphragm seal (Pancake, threads)
Flanges (DIN, ASME)
Hygienic connections
Tri-Clamp ISO2852
 
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...20mA HART
PROFIBUS PA
FOUNDATION Fieldbus
Certificates / Approvals ATEX, FM, CSA, CSA C/US, IEC Ex, TIIS, INMETRO, NEPSI
 
Safety approvals SIL
WHG/ Overfill prevention
 
Design approvals NACE MR0175
EN10204-3.1
 
Hygienic approvals 3A, FDA
 
Marine approvals GL/ ABS
 
Specialities Diagnostic functions
TempC Membrane