Product description Deltabar FMD71, FMD72
12 Endress+Hauser
3 Product description
3.1 Product design
Level measurement (level, volume and mass) with Deltabar:
LP 1
HP
p1
p2
P = p2
LP
P = p1 + p2
HP
A0016449
LP Sensor module LP (low pressure)
HP Sensor module HP (high pressure)
p2 Head pressure
p1 Hydrostatic pressure
1 Transmitter
The FMD71/FMD72 is best suited to level measurement in vessels with pressure overlay
or in vacuum vessels and tanks, high distillation columns and other vessels with changing
ambient temperatures.
The sensor module HP is mounted on the lower measuring connection and the sensor
module LP is mounted above the maximum level. The transmitter can be mounted on
pipes or walls with the mounting bracket.
The sensor signal is transmitted digitally. In addition, sensor temperatures and the
individual process pressures present at the respective sensor modules can be individually
evaluated and transmitted.
NOTICE
Incorrect sizing/order of sensor modules
‣
In a closed system, please note that the sensor module is affected by the superimposed
head pressure (p2) in addition to the hydrostatic pressure (p1). This must be taken into
account when sizing the sensor module on the high-pressure side (HP).
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