Our sensors stay connected across multiple rooms and floors. This way, your pets can freely roam around your house and the motion sensors will not detect them. Simplisafe Home Security Systems Home Security Systems Wireless Home Security Systems Home Security Home protects the entryways while leaving the motion sensors dormant so you can freely move about your place. How do simplisafe motion sensors work . Simplisafe doesn’t have any fancy sensors or touchscreen control panels, but it does a decent job of covering the essentials. Sensor testing (while in test mode) motion sensors: The way that a motion sensor detects movement has nothing to do with how light or dark it is in the immediate area. Mount it in a corner for maximum coverage of your room. You can arm or disarm using the keypad or the optional key fob. When more than 2 inches away, the sensor signals that it is open. New sensors can be added to your all new simplisafe system in one of two ways. Motion se...