Mounting active infrared beams into towers rather than on to walls or poles enhance the security level as it makes it very difficult for potential intruders to find out the number and height of beams installed. To encourage the use of towers without increasing the installation workload or risk of mistakes, we have introduced both two and three meters, 180° and 360°, free-standing and wall-mounted pre-built towers. The TWD-204RR a double sided two metre 360°free standing tower, with this model two beams can be fitted per side with heaters.