For tank wall thickness of 1-4 mm
This horizontal level switch can be mounted from the outside into the container. All you need is a hole with a diameter of 21.3 mm. This is where you plug the float switch from the outside into your container (external mounting). Then carefully tighten the screw.
In the installation position shown, it switches with increasing liquid. By turning the float switch by 180 ° It switches off when the liquid is decreasing.