Rule Super Float Switch 12v/24v  £59.50

Now backed by a 5 year warranty, the non-mercury Rule Super Float Switch is designed for the toughest applications.
Design includes marine grade 14 gauge “blocked wire,” larger float for increased buoyancy, removable base for easy maintenance and a snap switch design capable of handling pumps drawing up to 20 amps at 12 volt DC.
Dimensions: 105mm long, 40mm wide, 110mm high (at max.lift)
Maximum Current: 20 amp
For automatic on/off bilge pump control.
Switch design prevents rapid on/off cycling.
Mercury Free