The 5100ALBV is a water detector alarm for dry fire sprinkler auxiliary drains (low point drains or drum drips). The 5100ALBV detects water in the auxiliary drain and alerts you that maintenance is needed to prevent freezing. The alarm can be added to existing auxiliary drains or comes preassembled on the model 5300ALBV. It can be powered by a 9V battery, 12-24 VDC, or an optional 110V plug. The 5100ALBV can also be wired to the Fire Control Panel or Building Management System (BMS) for remote notification.