Absolute Plus is a modular tailor-made barrier available in different configuration, heights (2/2.5/3/4 m) and ranges (200/80/50 m) according to customer and site requirements. Absolute Plus is enclosed in extruded aluminum columns in which infrared beam and microwave technology are combined into one unit. Both sensing elements are located in a single casing, and are connected electronically by using a special "and" logic function. Since the two sensors will not "sense" an intrusion detection precisely at the same time, the system is designed to generate an alarm when both sensors produce an output in a preselected time interval.