S3 Series digital bilge switch incorporates a proprietary Electronic Sensing technology to detect bilge water levels and trigger pump activation. Attwood has engineered the S3 Series bilge switch to operate 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.
For added convenience, the S3 bilge switch 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.

5 year warranty

Specs:
DC Volts - 12
Max Amps - 15
Width - 3.16"
Height - 2.73"

Activates pump automatically. For use with all DC bilge pumps. Ignition protected. Marine grade tinned wires. Two year warranty

Available without fuse (model 35A) or with inline fuse (model 35AF)

Specs:
DC Volts - 12-24-32
Max Amps 14
Height 2", Length 4-1/2", Width 1-1/2"

Available without fuse (model 37A) or with inline fuse (model 37FA)

Specs:
DC Volts - 12-24-32
Max Amps - 20
Height - 2", Length - 5", Width - 2"

Available without fuse (Model 40) or with inline fuse (Model 40F)

Specs:
DC Volts - 12-24-32
Max Amps - 20
Height - 2-3/4", Length - 4-7/8", Width - 2-1/2"