Abstract: A switch assembly utilized for interconnecting foil conductors on a window or the like with a burglar alarm system. The switch assembly comprising a first switch unit adapted to be mounted on a movable window or the like, with a second switch unit adapted to be mounted on a fixed surface adjacent to the movable window. The first switch unit includes a slot with first contacting means including a pair of spring biased slidable contact elements insulated from one another and extending through the slot. The contact elements each have a fixed end and a free end. Coupling means for permitting removable positional securement of the conducting elements between each one of the fixed ends and the foil conductors is provided. The second switch unit comprises a second housing having second contacting means fixedly secured to the second housing and comprising a pair of contact members insulated from one another for engagement with the first contacting means.