Basic operation. The system comprises four transmitters and four receivers which can be housed within either a freestanding or wall mounted tower enclosure. The towers are of an ultra-slimline design and provide a full 180 degree unobstructed view for the beams. Tower enclosures are constructed from aluminum and acrylic with all fixings being stainless steel or zinc steel. This ensures that housings remain both functional and attractive throughout their installed life.

Reducing false alarms. The system monitors the sixteen individual beam paths and when an object bigger than the distance between the beam heads is detected a beam response time of 40 milliseconds is employed. If a single beam is broken the system automatically sets the required beam break time to 500 milliseconds or more. This dual response reduces the likelihood of the beams responding to small animals or blowing debris while still offering protection against a crawling intruder.

Outdoor perimeter protection. A slim 2"x9" photoelectric detector for the exterior surface of buildings which protects multiple doors and windows. Provides more economical and superior protection for roll-up doors and windows than multiple contacts or audio discriminators. Attempts to break glass or force entry are detected before the attack. Even when windows or roll-up doors are left open for ventilation, it stays on guard.

Go to extreme lengths. Satisfy your long range outdoor protection needs. Patented alignment technology (I.A.S.C.) gives alignment data at the transmitter and receiver to make aiming accurate. Lightning protection exceeding 14kV, form C relay output, adjustable frequencies, environmental disqualification circuitry, and a 5-year warranty assure a successful installation.

Example of structure protected by exterior sensors. Photoelectric beams and long range Passive Infrared Motion Detectors protect the perimeter of the property while wide angle Passive Infrared Motion Detectors protect the areas close to the structure.