Emerson Rosemount 8732EM, Reference Manual

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8705 flanged sensor Figure 2-3:
8711 wafer sensor Figure 2-4:
8721 hygienic sensor Figure 2-5:
The flow sensor contains two magnetic coils located on opposite sides of the sensor. Two
electrodes, located perpendicular to the coils and opposite each other, make contact with
the liquid. The transmitter energizes the coils and creates a magnetic field. A conductive
liquid moving through the magnetic field generates an induced voltage at the electrodes.
This voltage is proportional to the flow velocity. The transmitter converts the voltage
detected by the electrodes into a flow reading. A cross-sectional view is show in
Figure 2-6 .
Introduction
6 Rosemount ® 8732EM Transmitter with HART Protocol Reference Manual