FMD71 Electronic differential pressure

Product Item : FMD71-AA24AAC1H1HGDBCCCTIJ
Category： Pressure
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
Communication:4...20 mA HART
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Electronic differential pressure Deltabar FMD71

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.

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

Field of application

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

Features and specifications

Continuous / Liquids

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, "PLATINUM" 0.05% 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)
Process connection hygienic	DIN11851 DIN11864-1 Tri-Clamp DRD Varivent
Communication	4...20 mA HART
Certificates / Approvals	ATEX, FM, CSA, IECEx NACE, EN10204-3.1, EHEDG, 3A

Pressure

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 abs.
Max. Turn down	100 : 1
Max. overpressure limit	60 bar (900 psi)
Process connection	Threads Flansch (DIN, ASME, JIS)
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
Design approvals	NACE MR0175, EN10204-3.1,
Hygienic approvals	EHEDG, 3A