Patent ID: 8561417
Filing Date: 2013-10-22
Classification: F24F,G01F,H01H

Abstract:
1. A liquid level sensing system to monitor the liquid level in a drain pan associated with a liquid producing unit, said liquid sensing system comprising: a first liquid sensor including a distal end portion disposed within the drain pan and electrically connected to a first power potential; a second liquid sensor including a distal end portion disposed within the drain pan electrically connected to a second power potential; said distal end portion of said first liquid sensor being disposed higher in the drain pan than at least a portion of said distal end portion of said second liquid sensor; a signal generating module operatively coupled to said first liquid sensor and to said second liquid sensor such that when liquid within the drain pan reaches a predetermined level said first liquid sensor and said second liquid sensor contact the liquid causing said signal generating module to generate a shutoff signal fed to the liquid producing unit causing the liquid producing unit to cease producing liquid; and wherein said liquid sensing further includes an anti-microbial member comprising an anti-microbial material to inhibit the growth of moss, algae or fungus on and near said first liquid sensor or said second liquid sensor.