Outdoor sensors: what are they for?

 The outdoor sensors, also called perimeter sensors are small electronic devices that through various systems, such as infrared rays or microwaves, are able to identify the attackers who come to your home and through the control unit trigger the alarm.

 The perimeter alarm is efficient when the sensors are placed in strategic positions in the garden or courtyard adjacent to the home, or in positions that intercept the main access routes.

 How does it work?

 The perimeter anti-theft device works through external sensors which are external peripherals of the alarm system which through beams create an invisible protection system, with which any unwanted presences can occur.

 The sensors are constantly active and send all the information collected to the control unit, but only the signals that indicate the presence of an intruder trigger the alarm.

 Most of the wireless external perimeter sensors have a programming inside them, which allows to avoid false alarms, due for example to the circulation in the garden of the dog or cat.

 Types of perimeter sensors based on waves

 The sensors according to the rays they use are divided into:

 ·         Infrared sensors that use two different mechanisms: with active infrared, the waves are introduced into the reference area by the sensor itself, which then processes the return signals to see if there are any interruptions. With passive infrared instead, the waves are generated by the external elements that move in the external space and are reworked by the control unit.

·         Microwave sensors that analyze analyze the reflected radiation of a moving body. Microwaves reduce false alarms and allow for more accurate monitoring.

·         Dual technology sensors:  which use both microwaves and infrared rays, to ensure greater safety in areas very close to the home?

 Perimeter anti-theft devices

 It is evident that sensors are fundamental components of the alarm system because they are the first to be alerted by the presence of an intruder.

 The outdoor sensors are also divided according to the specific task to be performed:

 1.       External perimeter curtain sensors: create a barrier that has a triangular shape and is used for fairly limited areas. These sensors are usually used in front of entrance doors and are also called "volumetric" because they analyze the difference in volume between the moment when the area is safe and when an intruder arrives.

2.       Sensors for windows: they can be curtain or magnetic and are activated in the event of an attempted break-in.

3.       Underground sensors with wire: they detect the presence of an intruder based on the imperceptible movements of the ground. They are very efficient because they are very difficult to evade.

4.       Fiber optic sensors: they intervene against tampering in wired home alarm systems in Chicago.

5.       Barrier sensors: they create an invisible barrier through the waves (infrared / microwave) and can be both wireless and wired. Barrier sensors can monitor up to 100 meters away and secure the entire garden area.