Which alarm system should you buy for your home?

An alarm system gives you a certain feeling of security.
Ready for use day and night, the externally visible part shows:
we don’t make it easy for the (potential) burglar!

Some homeowners even have a dummy facade box to enjoy this deterrent effect …

Alarm types

The security levels or degrees of security of the alarm systems are called alarm types. Since these are mostly systems that are used for an alarm in the event of a break-in, they are usually referred to as intrusion alarm systems (EMA for short) or hold-up alarm systems (UMA for short). There are four security levels for EMA / UMA, these depend on the level of risk. Your specialist company can access a catalog of police duties here.

Subdivision of the 4 security levels / degrees of security:

  • Step 1:
    Not recommended as this is far below the police requirements
  • Level 2:
    EMA / UMA with a security level 2 are recommended for smaller residential properties. They have a medium sensitivity and overcoming security
  • Level 3:
    This security level has increased security against overcoming and is recommended for residential buildings and smaller commercial properties
  • Level 4:
    An EMA / UMA with security level 4 has a high degree of security against overcoming and responsiveness. The system is therefore ideally suited for monitoring people, residential buildings, commercial and public objects with a high risk potential

Alert types

Before purchasing a burglar alarm system, it is important to be clear about the different types of alarm. Of course, you will receive detailed advice from your specialist company on the subject of burglary protection. But we want to give you some information in advance.

Remote alarm
In the case of remote alarms, an external agency is asked for help, in most cases this is the police. Very often the remote alarm is also a silent alarm, so there is no perceptible signal. This does not scare off the criminal and the help center can prepare for the operation.

External alarm
The external alarm is probably the most common in the private sector. Here the alarm is usually given by optical and / or acoustic signals (acoustic alarm). The external alarm with its external signaling device serves primarily to deter the intruder and to attract attention.

Internal alarm
Another type of alarm is the internal alarm. This is primarily used for test purposes, such as a test alarm in schools or hospitals. No external agency (fire brigade) is asked for help and the alarm can be given at any time. However, the internal alarm is also often used in buildings that have their own security staff.

False alarm
The unintentional / unfounded triggering of an alarm is referred to as a false alarm.
Mainly caused by incorrectly designed or defective system components, but operating errors can also lead to false alarms.
Frequent false positives cause the EMA to “lose credibility”. In the case of an authorized report, this could also be confused with a malfunction.
Again and again, installations that often triggered false reports are no longer used and thus lead to a loss of investment.
In addition, a false positive can generate significant, unnecessary costs.

Monitoring types

Before installing an EMA / UMA, the question arises: What should be monitored? Whether private or commercial surveillance, the alarm system usually has several components. A distinction is made between outer skin monitoring and trap monitoring, whereby in the private sector often only the first variant occurs. A combination usually makes sense in the commercial sector.

Outer skin monitoring
The focus here is on those points that can be influenced from outside. These are, for example, windows and doors. The monitoring takes place in such a way that the alarm is triggered as soon as an opening or even a breakthrough takes place. A corresponding plant system works here with contacts that are attached to the critical points. One advantage of the outer shell monitoring is the alerting before the perpetrator enters the property or property. Second, the EMA can remain switched on when they are on site. For these reasons, this type of monitoring is very often used in residential buildings.

Trap surveillance
This means the monitoring of the interior. Depending on the property, use and environment, various sensors or motion detectors are attached to strategically important points. The alarm is triggered if the perpetrator is already in the surveillance area of ​​the EMA. You should keep in mind that a pure outer skin monitoring is usually associated with higher costs than a combination of both types.

Monitoring types

Determining the location is very important when it comes to the type of motion detector. A distinction is generally made between three types of working method:

Ultrasound monitoring
Sound waves are constantly emitted by the transmitter. During the reflection, the recipient is informed whether there is a change (target / actual comparison). This immediately indicates when objects – such as people or animals – are in the monitored area. In the case of a motion detector with ultrasound, it is essential to ensure that it is not installed above radiators, near sound sources or air currents. Since the carrier medium for sound waves is air, false alarms can otherwise quickly occur.

Infrared (IR) monitoring
The IR sensor detects heat sources and reports temperature differences in the environment. A change always occurs here when an object enters the monitored area. A person who moves has changing thermal radiation. This irregularity triggers the alarm. In the case of motion detectors, the passive infrared detector (PIR detector) is the most common. Pay attention to the twilight switch, which can either be built into the PIR detector or is available individually. It is used to monitor the brightness value and is mostly used outdoors, e.g. to control a light source in the dark.

Monitoring by electromagnetic waves
The motion detector offers the same functions as the ultrasound. However, the waves emitted differ; electromagnetic waves do not require a carrier medium. An alarm is also possible in a vacuum.


If the installation of an alarm system or EMA / UMA is planned, you should pay attention to a few points. Of course, your specialist company is the first point of contact here.

  • detailed instruction in the alarm system / EMA / UMA; the operating instructions should be at hand at all times
  • Only arm the alarm system / BAS / UMA when all parts are fully functional
  • In order to properly justify a possible legal claim later, you should insist on a description of the facility – according to the police duty catalog. If a deviation is planned, this must be documented.
  • Handover of the distribution plans, installation plans and connection plans
    Maintenance at regular intervals by qualified specialists
  • Type of surveillance: outer shell, trap surveillance or a combination solution?
  • Correct planning of the burglar protection system: Before a perpetrator can overcome the mechanical hurdles, the alarm should have been triggered
  • Trial period after installation (approx. 4 weeks) to determine whether there are any defects
  • Which type of alert is the best for me?
  • tested devices through acceptance by a testing or certification body according to DIN EN 45011
  • Monitored areas should only be allowed to enter after the system has been disarmed; False alarms are avoided and the “inevitability” is observed
  • Confirmation by the specialist company that the guidelines are being observed; Pay particular attention to the standards DIN EN 50130, DIN EN 50136 and DIN VDE 0833

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