FMD71 Electronic differential pressure Deltabar

Field of application

The electronic dp Deltabar FMD71 is a differential pressure system, used to measure the pressure or level, volume or mass of liquids in pressurized tanks or distillation columns/evaporators. The high pressure sensor (HP) measures the hydrostatic pressure. The low pressure sensor (LP) measures the head pressure. The level is calculated in the transmitter using these two digital values. The electronic dp system eliminates issues of traditional differential pressure measurements.

For differential pressure, level, volume or mass measurement of liquids in pressurized tanks and distillation columns/evaporators.

• Process connections: Threads, flanges and hygienic connections

• Process temperature: -40 up to +150°C (-40 to +302°F)

• Measuring range: 100mbar to +40bar (6 to 600psi)

• Accuracy: Single sensor up to ±0.05%, system up to ±0.07%

• International explosion protection certificates, hygienic approvals

Benefits

• Eliminates traditional mechanical issues resulting in greater process availability and reliability

• Overload-resistant high purity ceramic sensor (99.9% Al₂O₃)

• Safety risks are minimized with the new electronic differential pressure system architecture and design

• Lowest total cost of ownership due to reduced installation time, maintenance, downtime and spare requirements

• Multivariable level measurement: HART-based differential pressure, head pressure and sensor temperatures from one system

• Continuous health indication of the entire system via HART-based diagnostic

• High reproducibility and long-term stability

• Measuring principle

  Differential pressure

• Characteristic

  Electronic differential pressure transmitter with ceramic sensor (Ceraphire) for level, volume or mass measurement in liquids.

• Supply voltage

  4...20 mA HART:
  12...45V DC (Non Ex)
  Ex ia: 12...30V DC

• Reference Accuracy

  0.075% of individual sensor,
  "PLATINUM" 0.05% of individual sensor

• Long term stability

  0.05% of URL/year of individual sensor

• Process temperature

  –25...+150°C
  (–13...+302°F)

• Ambient temperature

  –40...+80°C
  (–40...+176°F)

• Measuring cell

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

• Vacuum resistance

  0 mbar

• Max. Turn down

  100 : 1

• Max. overpressure limit

  60 bar (900 psi)

• Process connection

  Threads
  Flansch (DIN, ASME, JIS)

• Process connection hygienic

  DIN11851
  DIN11864-1
  Tri-Clamp
  DRD
  Varivent

• Material process membrane

  Ceramic
  316L, AlloyC

• Material gasket

  Viton, Kalrez, EPDM, NBR, Silicone

• Fill fluid

  Silicone Oil

• Material housing

  Die-cast aluminum
  Stainless steel

• Communication

  4...20 mA HART

• Certificates / Approvals

  ATEX, FM, CSA, IECEx, NEPSI, INMETRO, UK Ex

• Design approvals

  NACE MR0175,
  EN10204-3.1,

• Hygienic approvals

  EHEDG,
  3A