When you see a side-mounted float level switch, you will definitely think that it is a float level switch designed to be installed sideways on the vessel wall. This type of switch is mainly used to monitor the level of liquid, and trigger the internal switch action when the float rises or falls with the liquid level. It is usually fixed by means of threaded or flanged connections.
However, the side-mounted float level switch can be mounted not only on the side of the container wall, but also on the top. Just like the picture below.
The side-mounted float switch controls the liquid level instead of the float moving directly on the arm bar as most people think, but the angle between the arm end connecting the float and the junction box and the plane changes, and the position of the float naturally changes in the space. And when this arm end is not in contact with liquid, it is naturally sagged by gravity; When the liquid level rises and touches the float, because the density of the float is less than that of the liquid to float on the liquid surface, the natural float and the connecting arm are floating, and the internal micro switch receives the signal and sends out the next instruction to remind the water level alarm point to arrive. As for why it is called a side-mounted float level switch, it is because its connecting arms are parallel to the water surface, as if inserted from the side, whether it is side-mounted or top-mounted.
The connecting arm of the top-mounted side-mounted float level switch is a right-angle type, while the connecting arm of the side-mounted side-mounted float level switch is only straight.
Therefore, the side-mounted float level switch is not only side-mounted, it can also be top-mounted, I hope you are not confused by the name.