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NOTE: This is an unformatted excerpt from our online fire protection training library.

Supervisory Initiating Devices

water level


The switch used to monitor the water level within a fire pump reservoir or other fire protection water supply tank is a float switch. When the water level is at the proper level the buoyant force pushing the float upward holds a switch open. When the water level drops, the float drops and closes the switch. Closure of the switch initiates a supervisory signal.
NOTE: This is an unformatted excerpt from our online fire protection training library.

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