Abstract: A sensor-based communications device activator, including a first signal transmitting device having a sensor and a second signal transmitting device, which may be preprogrammed to automatically alert emergency rescue personnel to the location of an individual who, due to an emergency, is unable to alert the emergency personnel on his/her own behalf. When one or more stimuli are sensed by the sensor, the activator directs a communications device, optionally including a GPS-based location tracking technologies component, to contact an emergency service. Alternatively, a manual alert device of the activator may be activated by the user to achieve this same result. Whether the communications device is contacted automatically or manually, the emergency service not only will learn that the individual is in danger, but can also learn, via the GPS-based component, the location of the endangered individual.