All >> Pressure measurement >> Differential pressure Deltabar

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Product name:

Differential pressure Deltabar

Product series:

FMD78

Product brand:

E+H/Endress+Hauser

Product feature:

• Large variety of process connections and membrane materials • New TempC membrane for diaphragm seals: minimum temperature effects and short recovery times • Highest safety with gas-tight feedthrough, supporting SIL2/3 capabilities and certified to IEC 61508 • Easy menu-guided commissioning via local display, 4 to 20 mA with HART, PROFIBUS PA, and 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)

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Measuring principle:

The differential pressure transmitter measures by detecting the pressure difference between two pressure points. The device is connected to different measurement points of the process system through two pressure ports: the high-pressure side (HP) and low-pressure side (LP). When gas or liquid media act on both sides, the generated differential pressure (ΔP) causes the internal sensing element, such as a metal diaphragm, to deform mechanically. This deformation is converted into an electrical signal through capacitive sensing technology or resistive strain gauge technology. The signal is then processed by the signal conditioning circuit, including amplification, linearization compensation, and temperature correction. Finally, the transmitter outputs an industrial standard 4–20 mA analog signal or digital signals such as HART protocol.

Product positioning:

Foundamental

Using scenario:

Deltabar FMD78 differential pressure transmitter features a metal sensor with dual capillary diaphragm seals. It is mainly used for continuous differential pressure measurement of liquids, gases, steam, and dust in the process and hygienic industries. The built-in HistoROM data module enables convenient management of process and device parameters. Compliant with IEC 61508 standards, it meets SIL3 functional safety requirements.

防爆型式：

非防爆

Ex i

Ex d

精度：

±0.075% o.f.s.

最大量程：

≤4MPa

最小量程：

≥10kPa

单侧静压：

≤16MPa

通讯方式：

4-20mA HART

PROFIBUS PA

一年稳定性：

0.03% URL/年

0.04% URL/年

0.05% URL/年

0.08% URL/年

0.2% URL/年

五年稳定性：

0.05% URL/5年

0.07% URL/5年

0.08% URL/5年

0.11% URL/5年

0.14% URL/5年

0.28% URL/5年

十年稳定性：

0.08% URL/10年

0.1% URL/10年

0.15% URL/10年

0.21% URL/10年

0.27% URL/10年

0.31% URL/10年

防护等级：

IP66

IP67

外壳材质：

铝/铸铝

316(L) 铸造/卫生型

供电电源：

24V DC

人机界面：

无显示&不可操作

有显示&可操作

SIL认证：

SIL2 (单表)

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Instruction

Operation

2D/3D

Certificate

Summary

FMD78 operating instructions.pdf

FMD78 操作指导.pdf

FMD78 technical information.pdf

FMD78 产品说明.pdf

FMD78 产品概览.pdf

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