July 6, 2025, 10:09 am | Read time: 3 minutes
A push of a button, a beep–and is your home secure? It’s not quite that simple. Some alarm systems even go off during thunderstorms. Find out which technology offers effective protection and what the police think of certain systems at myHomebook.
If you’re looking to buy an alarm system, your main goal is usually to better protect yourself from burglars. However, security doesn’t start with technology. The most important step is first securing windows and doors, as Sabrina Krenzler from the police crime prevention unit of the states and the federal government emphasizes. Nevertheless, alarm systems can be deterrents, depending on their features and use. Krenzler points out that burglars are aware that these systems can quickly and specifically alert security companies. This increases the risk for perpetrators of being detected and apprehended. Ideally, both should be combined: mechanical protection and an alarm system that ideally triggers before the burglar overcomes this protection.
Buying an Alarm System: Caution with Infrasound Systems
When planning to buy an alarm system, you should rely on proven technology. Systems based on infrasound, also known as air pressure, air volume, or room resonance frequency technology, work with built-in pressure sensors that detect air pressure fluctuations—such as those that occur when a window is opened. An alarm is then triggered.
But here’s the problem: Natural events like thunderstorms or strong winds can also cause pressure changes. According to Krenzler, this can lead to false alarms. The police are critical of this technology. There are no certifications for these systems from accredited testing bodies. Additionally, the “k-einbruch” initiative points out that frequent false alarms, which can sometimes incur costs, can significantly undermine the credibility of an alarm system.
Also of interest: When Insurance Does NOT Cover Burglary
Different Types of Surveillance Compared
If you’re looking to buy an alarm system, you should know which surveillance technology is suitable for your home. Two methods are common:
- Trap Surveillance: This involves motion detectors or sensors using infrared, ultrasound, or microwave technology to detect movements within an area. The downside is that the technology only comes into play when burglars have already entered the area monitored by the alarm system.
- Perimeter Surveillance: This specifically secures windows and doors and triggers an alarm before actual entry. This variant is particularly suitable for residential homes, as it can be activated even when people are present.
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Types of Alarms: How to Respond in an Emergency
Alarm systems can respond to a break-in in different ways:
- External Alarm: This emits a loud signal tone in the house to deter the burglar. An optional strobe light can also be installed as a visual signal.
- Internal Alarm: Informs people in the building so they can react in time without encountering the perpetrator.
- Remote Alarm: Notifies a constantly staffed emergency or service control center, which can call for help in an emergency. It is important that these centers are certified.
Additionally, experts recommend configuring alarm systems so they can also be used as panic alarms. Many modern, tested systems can also be easily integrated into existing smart home solutions.
The protection of a house must be tailored to local conditions and personal risk. Which technology is suitable in a specific case should be clarified in consultation with a specialist company or a police crime prevention advisory center.
With material from dpa