... hydroponics, saltwater tank, freshwater tank, gardening, aquariums for power head control, pet bowls, fish tanks, filtration, heating, pumps, ponds, basement alarms ... drain pans, pressure washers, carpet cleaning mach., reef aquarium, fluid control, ice machines, coffee pots, marine, automotive, automobiles, tropical fish tanks ... :1 x 107(DC 5V,10mA) FX-1AH-55-M16C Water Level Float Switch