Beam Sensor:
It is used to protect your property fences ,Photoelectric beam systems detect the presence of an intruder by transmitting visible or infra red light beams across an area, where these beams maybe obstructed. To improve the detection surface area, the beams are often employed in stacks of two or more. The technology can be an effective long-range detection system, It consists of two separate components: a transmitter and a receiver. The light beams only travel one way (from the transmitter to the receiver).when the lights beams are obstructed by an intruder, it signals the alarm control panel.