| 摘要 |
A fluid-sensing switch system that can monitor pre-established threshold fluid levels in the primary drain pan inside an air conditioning unit or other condensate-producing unit, and also in a secondary drain pan positioned under the unit, providing redundant safety response capability. Once the threaded plug of a sensing probe is connected to the unit's weep hole, it positions a center sensor extending through a false-trigger-reducing resilient piece in a position to wait for rising fluid capable of breaching a weep hole dam. The center sensor provides a first power potential, while a circular sensor also present provides the second power potential needed for signal generation. A signal-generating member connected to both sensors is electrically connected to the unit to shut it off, and/or activate a pump that removes fluid from the secondary drain pan. When mounted on a secondary drain pan, the signal-generating member provides the redundant safety response capability.
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