The AS888 float switch from JOHNSON protects electric pumps, is fully automatic and universally compatible. The mechanism is controlled by an internal ball. When the ball is still, the switch remains in the OFF position. As the water level rises, the ball begins to move and the float switch automatically switches on the bilge pump. Made of corrosion-resistant materials.  Suitable for 12 and 24 V operation. Max. amps: 15 A @ 12 V. Max. dimensions (LxWxH): 75 x 115 x 98 mm.