floatswitchar

Float switches are a type of mechanical level sensor used to detect the level of liquids within a tank or vessel. They operate on a simple principle involving a buoyant float attached to a lever mechanism. As the liquid level rises, it lifts the float, which in turn actuates a switch. Conversely, as the liquid level drops, the float sinks, causing the switch to return to its original state. This action can be used to control pumps, activate alarms, or signal a change in liquid level.

There are several common designs for float switches. Some utilize a simple pendulum-like float that tilts a microswitch. Others employ a magnetic reed switch enclosed in a sealed tube, activated by a magnet in the float as it moves. The materials used in float switches vary depending on the application, with common options including plastic, stainless steel, and other corrosion-resistant metals to handle different chemical compositions of liquids.

Float switches are widely used in various industries. They are found in residential sump pumps to prevent basement flooding, in industrial machinery to monitor oil levels, and in agricultural settings for controlling water levels in tanks. Their straightforward design, reliability, and relatively low cost make them a popular choice for many liquid level monitoring and control applications. However, they are generally not suitable for viscous liquids or those with suspended solids that could impede the float's movement.