If the alarm is programmed actions that the alarm system should take, the infrared sensor is the watchman, because he’s the one who identifies drive and informs the central alarm about the occurrence.
In our article you will learn what types of infrared alarm sensor available on the market, what are security, which the functioning of each one and what is the intended use of each model.
We ask that you read our article until the end and if you have any questions or want to make a comment, please use the comments field at the bottom of the page.
Infrared Sensor Models
As we have said, are the infrared alarm sensor “electronic eyes” Mindful of your alarm system.
It is through this sensor that is made to identify an intruder in your property.
There are several models of infrared sensors:
External sensors, semi-open and interns;
Wired sensors and wireless sensors;
Pet sensor and sensor microwave;
Passive infrared sensor and infrared sensor.
Double beam sensor and sensor with triple beam.
The infrared pet function is indicated for sites that have small animals crawling, i.e. that move in low altitude, avoiding with this false triggers caused by your pet.
The pet sensor is classified by weight, e.g., 20 pounds pet sensor means that no firing will not occur if there is a move from a low animal to 20 kg.
Although used in all places and in all applications these sensors should be installed just where the offset of your animal, because a person who normally weighs more than 20 kg can crawl and also avoid the shot, breaking the system, taking advantage of technology that had been made for another goal.
Can Summarize The Pet Sensor:
Intended use: locations with small animals;
Place of application: only in places where your animal passes;
Avoid applying at all locations because this sensor does not captures movement near the ground.
The infrared sensor with the microwave function is a sensor indicated for those who want to increase the level of protection and avoid the most false triggers.
The microwave sensor has an advanced optical filter and an analysis and intelligent processing technology that detects the movement of the body through Doopler effect of microwaves.
Thus, the microwave sensor is composed of three components: a transmitter, a receiver and an analysis and detection circuit that emits pulses and analyzes the signals back.
The microwave sensor is suitable for installation in outdoor areas, because it is in these areas that occur most of the shots.
We can summarize the microwave Sensor:
Intended use: sensor designed to avoid false shots;
Place of application: external locations where usually occur false shots;
Sensor with higher cost.
Passive Infrared Sensor (Ivp)
As its name reveals, this infrared sensor emits infrared light, only receives the signal emitted by body heat.
This type of sensor is the most common and has several utilities provided serve as turning on the light presence sensor environments, how to identify the presence of a person and notify the central alarm about this presence.
It works by detecting the warmth and is called passive, because unlike the active sensor, only detects the infrared light, no issues.
By the way, you should not use these sensors in close to places that have a very large variation in temperature such as places where a Sun or strong wind such as Windows, doors, fireplace, heater, air conditioning etc.
Passive infrared sensors have multiple sensitivity settings and to reach and work with an opaque lens, called “Fresnel” and an led that flashes to detect the presence of a person.
We can summarize the passive infrared Sensor:
Intended use: sensor suitable for light bulbs and for every use in alarm systems;
Place of installation: recommended internal installation;
Avoid installation near areas with large temperature change.
Active Infrared Sensor (Vat)
This infrared sensor emits infrared light through a point and receives this signal at another point and it is precisely the interruption of this connection between the points that will generate the shot. It’s like there’s an invisible line and cross it is raised the alarm.
Due to this characteristic, the active sensor is also called barrier perimeter sensor or sensor.
Are enough used in ordinances of building and condominiums, where there’s a very large cars, because they are able to detect that there is a car between the sensors and prevent the gate from closing on the car.
Another very common function of these sensors is installing on walls to replace the electric fence, because they are more discreet, present no danger even being installed in low walls and does not rust, so are widely used on the coast where the effect of the salty air it oxidizes very quickly the electric fence.
We Can Summarize The Infrared Sensor:
Intended use: input and output of vehicles and to protect walls in place of the electric fence;
Installation location: on top of walls and garage doors.
In our article you learned how to work each of the various types of infrared sensors on the market and what your using.
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