Review on TEMCo Float Switch for Sump Pump & Water Level Control - NO/NC Function, 13ft Cord, 5-Year Warranty [Model CN0359] by Sean Maples

is a float switch. The nice thing is that it's dual (either floating up or down) - meaning it's a switch that can be wired to operate in either direction, up-down or vice-versa. The wire cross-section is suitable for the boosters and pumps for which it is designed and is of sufficient length. While you usually do your own wiring, wire will do for most applications. There's not much more to say about this as each app will be different depending on how you use it. I use it as a backyard drain pump (we don't have a lot of water in Asia, so I haven't used it yet. But the plan is to have a drain pump for the rare occasions when my backyard floods my pit, and there's a lot of flow off the roof down).