Intruder Detector

The intruder detector, developed with a NASA license is designed to prevent burglaries. This technology was simulated from the Apollo Lunar Exploration Program. Before a prowler breaks in, he is unaware that his presence has already been detected and reported. Encased in a stainless steel tube, detector is implanted in the ground outside the facility being protected - home, bank, industrial or other facility. Vibration-sensing detector picks up the footstep of anyone within a preset range. Detector is connected by cable to transmitter which relays warning to a portable radio receiver. Radio alerts plant guards or home occupants by emitting an audible tone burst for each footstep.

Full article: http://hdl.handle.net/hdl:2060/20070018927