Installing magnetic contact sensors is a relatively simple process that can be done by a professional or a DIY enthusiast. The first step is to choose the right type of sensor for your needs, based on the size and type of doors and windows you want to protect. Next, you will need to mount the sensors on the door or window frame and the door or window itself, making sure they are aligned properly. Finally, you will need to connect the sensors to the alarm control panel, either through wired or wireless connections.