A float switch is a device used to detect the level of liquid in a tank or container. It operates by using a floating object that rises and falls with the liquid level. When the liquid reaches a certain height, the float activates a switch, which can then control pumps, alarms, or other equipment. Float switches are commonly used in various applications, including sump pumps, sewage systems, and water tanks. They help prevent overflow or dry running of pumps, ensuring efficient operation and protecting equipment from damage. Their simple design makes them reliable and easy to install.