Mounting bracket for a security device

A magnetic switching system for detecting relative movement between a first and a second member, the switch device comprising:

• a first part coupled to the first member including a switch having an electrically conductive shiftable body that shifts between simultaneous contact with two switch elements and non-simultaneous contact with the two switch elements based upon an applied magnetic field, the first part including a flux concentrator positioned in proximity with the shiftable body, the flux concentrator providing a reduced reluctance path for the applied magnetic field such that the strength of the applied magnetic field is increased and the flux concentrator directing at least a portion of a magnetic field emanating there-from toward said switch;
• a second part coupled to the second member including a magnetic component to generate the applied magnetic field, said first and second parts spaced apart from each other by an operational gap;
• a bracket affixed to the first member, said bracket having a substantially flat body including a mounting element receiving said first part thereon, said bracket further including two substantially parallel slots extending through the substantially flat body, the slots extending perpendicular to the operational gap such that the size of the operational gap may be adjusted.