Rule-A-Matic Plus Bilge Pump Float Switch | West Marine
PHCC PRO SERIES, 110V AC, 10 ft Cord Lg, Float Switch - 49AX06|VSC2 - Grainger
Float switch - Wikipedia
Sludge Boss Septic Float Switch, Heavy-Duty Sewage Pump Switch for Viscous Liquids and Suspended Solids in Wastewater, Mercury-Free Self-Orienting Tank Float for Septic Pumps to 1/2 HP (20 Ft Cable) - -