5.2.1 Pressure sensor
The sensor measures the hydrostatic pressure and transforms it into a 4–20 mA
electric signal. The controller converts the signal to a water level that is
expressed in meters or feet.
5.2.2 Open Bell
The Open Bell level sensor connects to a pneumatic sensor in the controller.
The range is 0 m to 5.1 m (16.7 ft). The lowest water level must sink below the
Open Bell level sensor in each pump cycle.
5.2.3 Float switches
A float switch provides an input signal at a configured start or stop level. A
maximum of five switches is possible.
5 Function Description
Flygt FGC 400 Installation, Operation, and Maintenance 13
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