Water level sensor

Details Water level sensor Water level sensor

2007-03-20

2007-03-20

Williams, Hezron (Department: 2856)

Measuring and testing

Liquid level or depth gauge

Float

Reexamination Certificate

active

11273210

ABSTRACT:
A liquid level sensor apparatus for monitoring the drain line of condensate from an air handler of a refrigeration system senses the presence of backup liquid in a vertical pipe in the drain system. A closure of the upper end of the pipe supports a magnetic switch assembly down in the pipe. A float with magnet surrounds the switch. When water in the pipe raises the float to a fixed distance below the closure, the magnet opens the switch circuit to control the air conditioning system. A vent in the closure permits air in the pipe to escape as the water rises in the pipe. Optical and sonic alarms may be included.

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