Whale Marine Electric Bilge Sensor Switch The electric bilge sensor switch by Whale Marine is designed to work with your bilge waste system by sensing water levels. Once the switch senses 2 of wter it will automatically turn the bilge pump on until the water reaches below 12. The body of the switch is nylon to hold up to high temperatures. Specifications Voltage 12V d.c. or 24V d.c. Current Suitable up to 20A Standby current .008A California Residents WARNING Cancer and Reproductive Harm - P65Wa