The DiversiTech UA-1 Universal Alarm 24VAC is a low-voltage HVAC safety alarm designed to detect and indicate potential system faults, particularly condensate overflow conditions. It works by connecting to 24VAC control circuits and monitoring compatible safety switches, including Wet Switches, condensate pumps, SOS devices, and float switches used in air conditioners, heat pumps, and... https://www.partshnc.com/ua-1-diversitech-alarm-universal-24vac