A vertical float switch is very important for enabling you to monitor the level of the water in a tank. As its name suggests, this type of switch floats on the water of the tank. A vertical float switch is composed of two different parts: a stem (or 'reed') and a doughnut - shaped float. The stem runs through the float and, when the water level drops below a certain level, the stem and the float will align. This alignment triggers an electrical signal to the electrical mechanisms that are situated outside of the tank. The result might be a warning light indicating that personnel need to come and manually adjust the water levels, or the result may be the triggering of an automatic mechanism that allows more water to flow into the tank. Hermetically sealed wires and the use of magnetic connections ensure that these switches are totally safe to use.