Even with powerful doors and reliable locks it’s impossible to be completely sure security of your own home. To maximize the level of security of yourself and your belongings, you need a security alarm for your home or apartment. All modern systems work on a similar principle. But they differ in how the data is transmitted, the number and type of sensors and other properties. In order to better understand what is better in each case, it is necessary to understand what types of burglar alarms exist and how they work. 


Home ajax burglar alarms differ in the way the data is transmitted and the recipient receives this information. Otherwise, the principle of their action is similar and is based on interaction. The main components of the system:

A set of sensors and sensors of various working principles

Control panel

An executive system, which includes sound and light alarm devices, as well as devices that send a signal to the apartment owner’s security department or telephone

Power supply unit

The wire connection may be lost when using a wireless alarm

\He receives them, processes them, and transmits the generated signal to the transmitter and transmission device. Information within the system can be transmitted over power lines or radio stations, and to security firms and apartment owners, it arrives via cellular networks, over the air, city phone networks, or over the Internet.

The most important role in the security alarm system belongs to the sensors – they will explode first and it is necessary to notice any illegal movements in the apartment. Sensors are divided into two such types:


This is the main sensor needed to fix the intrusion of uninvited guests into the house.

Detection sensors

They are, as a rule, built into GSM alarms and can warn the owner of water leaks, gas leaks, fire reports, the presence of smoke and carbon monoxide, lack of power, etc.

Safety sensor on which the basis of the alarm may be different:

Magnetic touch sensors are near windows and doors and respond to their turn;

 They work on the principle of detecting sharp changes in ambient temperature. If an attacker enters the sensor battlefield, the latter will detect a rapid temperature rise at one point and the same rapid temperature drop. Such fluctuations make the detector travel. This type of detector is placed on the ceiling or wall, the angle of action can be different: there are 360-degree sensors, but there are point sensors.

Ultrasonic sensor they work on the principle of ultrasonic emission with a frequency of 15-75 kHz.  If no one is in the protected area, the waves will return with the same frequency. The human body can absorb some of the energy by changing the frequency of the working wave is based on the Doppler principle. When the sensor detects that the signal is incorrectly returned, it sends information about the alarm. It is easy to deceive such sensors and therefore is considered obsolete.

Microwave sensor allows you to detect the presence of uninvited guests by sending the microwave from the transmitter to the recipient. They can be in the same building when it comes to an apartment or house, or indifferent buildings when it is covered. Front perimeter. 

Photoelectric sensor it allows you to recognize the thief’s movements using visible or infrared beams emitted by the device on the wall. If the attacker passes through the beam, an alarm will sound. It is not difficult to bypass such a sensor, therefore it is recommended to install it randomly in a checkerboard pattern to obtain a fence beam.

Earthquake sensors Used to inspect broken glass are usually installed on glass or on window frames. When the glass is broken, a shock frequency of 3-5 kHz is emitted, which is recorded by the sensor.

When opening doors or windows, violating the integrity of glass or walls, moving around the apartment to the control point receives the appropriate signal. Usually, the sensors and control panels are manufactured accordingly. The principle of complete interchangeability and this means that, if necessary, the alarm system can be expanded. The type and number of sensors are selected. It depends on the configuration and size of the apartment. Many sensors are not always good because they can be duplicated. That is why it is better to contact a specialist for a competent organization of home security systems.

You can configure the alarm so that in addition to alerting the owner and/or the security company, sirens and emergency lights work the front door is blocked or the smoke generator is activated

Signals are transmitted from sensors to control panels and alarm devices wirelessly via radio channels or through a wired trunk cable.

  • Both systems are used successfully today. But still, wireless can win the palm of your hand.
  • The cable system has the following advantages:
  • Reduce management costs
  • High signal quality
  • High reliability under proper installation

The main disadvantage of such a system – a long and laborious installation, the presence of a large number of cables that can significantly damage the interior, therefore it is recommended to install a cable alarm at the repair stage. Moreover, the wiring must be installed as inconspicuously as possible, otherwise, there is a big risk that an attacker will violate its integrity and disable the alarm system entirely.

Wireless alarm system Find more and more applications in such view Benefits:

  • Quick installation;
  • Lack of wires

Among the minuses they call a higher cost and the risk that the radio signal can sink in, therefore it is better to amplify the system with elements that will prevent radio interference, a wireless alarm may not work always, and the distance between the safety sensor and the control panel should not be too large.

The disadvantages of wireless also include the lack of constant monitoring of communication channels. Since it is not always possible to keep track of the current state and performance of the sensor, you cannot be completely confident that in a dangerous situation an alert will be sent. On the other hand, it cannot be said that wireless alarms are frankly unreliable – they can fail under conditions of strong electromagnetic interference.

You also need to be prepared that the wireless system needs a battery replacement. On batteries, it’s better not to save money, and most detectors have a low battery alert option.


 It depends on who received the information on how to enter the apartment. Alarms can be divided into:

  • Stand alone;
  • Remote control

Autonomous system – the simplest version of the alarm When the sensor is triggered, an audio signal (about 120 dB) or a light signal psychologically affects the thief and attracts the attention of the neighbors, able to send a message to the owner. There is no security service signal; the apartment owner takes full responsibility. The advantages of such a system are low cost and ease of handling. Standalone alarm system suitable for apartment building but it’s not very effective for a private house, especially if it’s in a remote area. There are also some false positives.

Remote Alarm It provides the transfer of information about hacking to remote controls in public or private security structures. But at the same time this does not prevent the possibility of using an audio signal. Upon receiving a signal of theft, security personnel must arrive at the scene in minutes.  But not cheap because you have to pay not only but only for installation and connection but they also regularly pay a monthly fee to the security company.

Many, out of distrust, fear that during their stay at home security company employees will be able to get into the apartment. One should not be afraid of this for a number of reasons: firstly, the unlock code is known only to family members, and secondly, all unlocking situations are recorded in the protocol in the remote control. By the way, the remote alarm also responds when someone cuts the telephone cable if the system uses this communication channel to transmit data.

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