Your security system motion detectors are the key to making sure that any intruders who successfully enter are stopped in their tracks by the sounding alarm. Although there are some given places for these motion detectors, such as your entryways, hallways stairways, and any vulnerable windows, there are also places where motion sensors should not be. It is a good idea to have motion detection in as many areas of the home as possible, but homeowners must take caution to place the sensors in areas that will not trigger a false alarm.