Creating an invisible barrier up to 300 meters, Unifore photobeams are the ideal sensor can protect the perimeter of your premises. They offer distinct advantages when compared to PIR sensors as it uses active infrared technology. Photobeams are able to create an upper and lower beam between IR receiver and IR transmitter, triggering an alarm only when both beams are interrupted therefore can eliminate false alarms caused by falling leaves, branches, animals. Active infrared photobeams are so far one of the best established perimeter security solutions in the market place. They come with relay outputs (NC, NO), can be easily connected with other security systems.