Motion detection for outdoor perimeter security and intrusion detection is a necessary part of the security unit. Make sure your motion detection system uses highly reliable passive infrared technology to detect intrusions. SmarterBeam is a motion diction solution used for protecting outdoor perimeters where a fence line is present. A single detector has a range of 500 feet when installed just inside the fence. When an intruder moves through the invisible infrared curtain, the sudden change in the infrared radiation is detected and an alarm condition occurs with each fence security breach. SmarterBeam uses adaptive threshold decoding (ATD) and signal shape analysis with perimeter security devices, which dramatically reduces nuisance alarms.