What are float switches?
Float switches are most commonly used in tanks or basins with three floats connected to a junction box which is, in turn, connected to a control panel. The diagram below shows a typical multiple float switch system design. These three floats control the levels in the tank by turning “on” or “off” as the fluid levels rise and fall. The bottom pump off float latches the holding relay on water rise, the pump on float then rises and runs pump until the bottom float drops out releasing the holding relay. These floats work well with low voltage, intrinsically safe circuits. They are used in many different applications wherever fluid levels need to be monitored including sump pump basins, sewage basins, cisterns, septic tanks, chemical solution tanks and more. Float switches replace air bubbler systems, transducers, diaphragm switches, ultrasonic and electrode systems. All can be used in residential, commercial, industrial, agricultural and municipal applications.
