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Electronic differential pressure | Deltabar FMD71 ENDRESS+HAUSER SAS

Electronic differential pressure | Deltabar FMD71

Differential pressure sensor 

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Electronic differential pressure system utilizing two ceramic sensor modules and one transmitter.

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.

• 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


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

Measuring Principle : Differential pressure Characteristic / Application : Electronic differential pressure transmitter with ceramic sensor (Ceraphire) for level, volume or mass measurement in liquids. Supply / Communication : 4...20 mA HART: 12...45V DC, Exia: 12...30V DC Accuracy : 0.075% of individual sensor, Long term stability : 0.05% of URL/year of individual sensor Ambient temperature : –40...+80°C (–40...+176°F) Process temperature : –25...+150°C (–13...+302°F) Process pressure absolute / max. overpressure limit 60 bar (900 psi) Pressure measuring range : 100mbar...40bar (1.5psi...600psi) Process connection : Threads Flanges (DIN, ASME, JIS)
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See also

Pressure sensors Membrane pressure sensor  Hydraulic pressure sensor  Piezoresistive pressure sensor Pressure transducer Pressure transmitter 

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