attwood Digital Bilge Switch, 12 Volt White switch 15 a max. Pump amp draw Rated 12-volt 36 inches wire Fully Potted electronics The S3 series digital bilge switch incorporates a proprietary solid state electronic sensing technology to detect bilge water levels and trigger pump activation Operates in any bilge water mixture consistently without failure You can rest ensured that your pump won't be exposed to continuous cycling as the S3 switch won't be fooled by splashing bilge water, chemicals, sludge build up or foam Can be mounted on the floor of the bilge directly to a stringer wall or alongside the basket of the pump without added components or brackets Directly compatible with all other competitive products. Equipped with fully sealed electronics that are completely protected from water or chemical damage. Free from moving parts that can jam up, break or wear out over time.