The SM-FOZ-41XX family of single point side entry float switches are designed around the simple, proven and reliable reed switch and magnet principle.
The SM-FOZ-4105 and SM-FOZ-4120 are mounted from the inside and outside of the tank respectively whereas the SM-FOZ-4115 has a universal fitting, which expands on tightening, and can be mounted from either the inside or outside of the tank. All three versions can be used to trigger either a low level or high-level alarm.