Magnetic proximity sensors are used where high positional accuracy in sensing is required. Cylindrical magnet sensors are available from the smallest 2.5 mm diameter ultra-miniature packages to the standard 6.0 mm diameter packages. Threaded versions are suitable for applications where positional adjustment is required. Screw mountable magnet sensors can be directly mounted on enclosures, doors and windows. All of these sensors come in two versions, one for switching low level 10 W loads, and the other, for switching up to 60 W line voltage loads.