Electric Float Switch allows single point detection of coolant high/low levels through a side wall of a tank using normally open or normally closed contacts 30 Watt rated switch can be wired into a OEM Low Coolant Level circuit or used as a switch for an aftermarket coolant level light Includes a 1/2" NPT aluminum bung so that the level sensor option can be added by drilling and welding the bung to a customer's aluminum coolant tank