Perimitrax, a covert perimeter intrusion detection sensor manufactured by the Senstar-Stellar Corporation, generates an invisible electromagnetic radio-frequency detection field around buried sensor cables. This field is approximately 1 meter high by 2 meters wide and up to 200 meters long per zone. If an intruder disturbs the field, an alarm is presented locally or, in the case of a network system, is instantly displayed as an alarm on a central control system. Unlike other sensors, Perimitrax is an adaptive system, which means it has the unique ability to detect moving targets based on size or mass and movement. Unless a target possesses the minimum alarm characteristics, it will not be detected; therefore, although a person or vehicle crossing through the field will be detected, Perimitrax's unique algorithms easily filter out common false and nuisance alarms. Because the sensor cables do not affect site aesthetics and the detection field is invisible, intruders or escapees remain unaware of its presence and therefore cannot locate, avoid, or tamper with it. Combined with its advanced technical capabilities, these inherent features result in the lowest vulnerability to defeat of any outdoor system.