Sensormatic is a subsidiary of Tyco International, that manufactures and sells electronic article surveillance equipment. Sensormatic Electronics Corporation was purchased by Tyco International in 2001. The acquisition was executed by a merger of Sensormatic with a subsidiary of Tyco. Sensormatic is frequently called by the name of its parent company ADT, formerly ADT/Tyco. They manufacture acusto-magnetic (AM) electronic article surveillance systems.