Johnson ULTIMA Bilge Switch Manufacturers Code : 34-36303 Suitable For Use with 12 & 24v DC SUPPLY Ultima Switch is rated to handle pumps up to 20A at 12V ...or 10A at 24V No moving parts, totally sealed solid state electronics and field detectors Environmentally sensitive; no mercury No exposed sensors eliminate corrosion possibilities Activates at a 50 mm (2") fluid level and deactivates at a 20 mm (¾") fluid level A three second delay prevents false starts from water sloshing in the bilge Meets ISO 8846