The 12/24V electronic bilge switch activates your bilge pump automatically when water exceeds the acceptable level and deactivate when water has been removed. Switches DC positive and can be used with PN 01-66-027, Bilge Pump Panel 3-way 12/24V, in combination with any bilge pump. For a fully automatic removal of your bilge water connect a switch to your electrical bilge pump. Fully sealed without any moving parts. Will not corrode and are not affected by oil or debris. Note! Product picture shows a similar product and electronic bilge switch looks slightly different from the digital bilge switch.