Last updated: 16/10/2022

Welcome to our big door alarm test 2022. Here we present all the door alarms that we have tested in detail. We have compiled detailed background information and also added a summary of customer reviews on the web.

With this we want to make your purchase decision easier and help you to find the best door alarm for you.

You will also find answers to frequently asked questions in our guide. If available, we also offer interesting test videos. Furthermore, you will also find some important information on this page that you should definitely pay attention to if you want to buy a door alarm.


  • A door alarm allows you to quickly, easily and inexpensively retrofit your home and make it more burglar-proof.
  • There is a wide range of door alarms available to meet different needs.
  • Door alarms are versatile and do not have to be limited to securing burglar-prone doors and windows.

The Best Door Alarms: Our Picks

Guide: Questions you should ask yourself before buying a door alarms

How does a door alarms work?

A door alarm almost always consists of two sensors. These are usually two magnets.

When mounting the door alarm, one sensor is attached to the door frame and the other to the door.

It is important that both sensors are at the same height, because as soon as you switch on the door alarm, the two sensors come into contact with each other.

If the door is opened undesirably, the contact between the two sensors is interrupted and the door alarm emits an acoustic signal. The volume of this signal can reach up to 130 dB (decibels).

A door alarm can prevent a burglary. (Image source: / Holger Kraft)

If you should accidentally trigger the alarm or want to switch off the door alarm, you can choose between different variants of a door alarm.

For example, there are door alarms with remote control, pin code lock or key.

What types of door alarms are there?

The differences are in the features that the door alarm can have. Most door alarms are a combination of several features. There are:

  • Door alarms with sensor
  • Door alarms with motion detector
  • Door alarms in the form of a doorstop
  • Door alarms with key or key switch
  • Door alarms with pin code
  • Door alarms with remote control
  • Door alarms with app

Basically, every door alarm works in the same way. Either a door alarm consists of two parts. Both parts are equipped with a sensor that are in contact with each other.

If this contact is interrupted, the door alarm is triggered. Then there is a door alarm with a motion detector that is triggered as soon as it detects movement in its radius.

In addition to the basic types of door alarms, you can also opt for different operating options. Here you can choose between key, pin code, remote control and app.

Type feature
Key/key lock easy to switch on and off with the corresponding key
Pin code a pin code is required to switch on and off, higher security
Remote control easy to switch on and off even from a distance
App choice between different switching on and off options

Apart from the classic door alarms mentioned above, you can also opt for a door alarm in the form of a doorstop or wedge. This is triggered as soon as the door is opened and stopped by the wedge.

What does a door alarms cost?

There is a very wide price range for door alarms. The cheapest models start at a few euros and many are also called “alarm systems”, whereby this is an alarm sensor or motion detector with an acoustic signal.

The higher the quality of the door alarm, the higher the price. An average door alarm has a price of ten to twenty euros.

Individual door alarms in a price segment below 100 euros are best suited for protecting individual doors.

If you want to protect your whole flat or house from burglary, it is better to invest in a real alarm system.

Why is a door alarms useful?

With a door alarm, you can retrofit doors and windows without much effort to increase the burglary protection of your home. It is also an inexpensive alternative to a complete alarm system.

Door alarms and surveillance cameras are often combined. (image source: / Josh Shaw)

Another advantage is that if you choose a door alarm with sensors, the alarm will always go off as soon as the two sensors are no longer in contact with each other.

It doesn’t matter whether the door has been forced open, a window broken and the door handle used, or whether the door has simply been drilled open.

Installation is also usually very simple. Normally, you should not need any further help.

What is a door alarms suitable for?

A door alarm can be used in many ways and is suitable for almost all doors and windows that are particularly at risk of burglary, for example the front door or patio door.

Patio doors are particularly vulnerable to burglary. A door alarm is worthwhile here. (Image source: / StockSnap)

A door alarm is not only useful for securing front doors. Such an alarm system can also be installed on showcases or cabinets with valuable objects that should not be opened by everyone.

A door alarm can also be attached to a refrigerator or freezer to prevent the door from being left open.

In principle, a door alarm can be attached to any door that should not be opened by everyone. This includes, for example, an emergency exit or a fire door.

How is a door alarms fitted?

Fitting a door alarm is not difficult. Most devices can be attached to the door and door frame without drilling using the adhesive strips provided. Some door alarms also need to be fixed with small screws.

Type of attachment advantages and disadvantages
Adhesive strips very easy to remove again without further damage, also easy to tear off and deactivate in the event of a break-in
With screws more difficult to attach, leaves damage, not so easy to remove and deactivate in the event of a break-in

It is important that the recommended distances between the two sensors are observed. You must check on the Internet whether the door alarm of your choice is the right size for your door.

If both sensors of the door alarm are at the same height and are triggered as soon as this is no longer the case, you have successfully installed your door alarm.

What are the alternatives to a door alarms?

A door alarm is best suited for securing individual doors, but if you want to protect your entire home from burglars, you should choose a different type of protection.

As an alternative to a door alarm, you can choose an alarm system with video surveillance for burglary protection to be really safe.

Buying criteria: You can use these factors to compare and evaluate door alarms

In the following, we would like to show you which factors you can use to compare and evaluate door alarms. This will make it easier for you to decide whether a particular door alarm is suitable for you or not.

In summary, these are:

  • Installation
  • Operation
  • Volume
  • Drive type
  • Trigger type
  • Possible applications


A door alarm can be installed in two ways: with screws or with adhesive strips. The latter is the more common option here.

A door alarm that is attached to the door frame with screws cannot be easily removed. So if a burglar gets the idea of trying to tear off the door alarm to get around it, the screws will prevent him from doing so.

However, the screws leave damage in the door or door frame that will be visible if you no longer want to use the door alarm.

As mentioned above, most door alarms come with adhesive strips so you can easily attach them to the door and door frame.

It is a simple principle and the door alarm does not leave any damage on the door afterwards. In the event of a break-in, the alarm can be quickly torn off by the burglar and thus put out of action.


You can distinguish between four types of operation: with a key switch, with a pin code, with a remote control and with an app. The same applies to all types of operation: they cannot be deactivated by just anyone.

A door alarm with a key switch can be switched on and off with the corresponding key. This keeps the handling simple and prevents mistakes from being made when setting the alarm.

However, the keys for the door alarm must be kept somewhere or can get lost.

A door alarm with a pin code is a four-digit code that is required to activate or deactivate the door alarm.

This code is usually generated automatically, but does not change after that. With a door alarm with a pin code, you do not have to keep a physical object, but remember the code in order to be able to enter it.

A door alarm with remote control has only two options, similar to the door alarm with key switch: you can switch the door alarm on and off with two different buttons.

Here, too, the handling is kept simple, but the remote control must be kept somewhere.

A door alarm with app works similarly to a door alarm with remote control. The function for switching the door alarm on and off is in the associated app.

Door alarms can sometimes also be operated via apps. (Image source: / Andriy Popov)

Here, however, no physical object such as a remote control needs to be kept and the door alarm can be operated from any internet-enabled device.

In addition, other properties of the door alarm can usually be changed in the app, such as the volume or the alarm sound.


The volume of most door alarms ranges from 100 dB to 120 dB. However, it is often the case that you can also set the volume manually on the device. This feature is more common with door alarms from the higher price categories.

However, the highest possible volume is usually not loud enough to replace a real alarm system.

A door alarm is more suitable for protecting against burglars at night, because if you are not there, it is difficult to hear the alarm sound.

Drive type

Door alarms for retrofitting doors and windows are usually battery operated. This means that they are easy to install and you don’t have to look for a power source to connect them to.

However, there is the possibility that you can get a door alarm that is connected to the power supply. This prevents the unwanted standby mode that occurs when the batteries are flat. However, this makes it more difficult to install.

Triggering time

With door alarms, you can choose between two different variants with regard to the triggering time.

With the first variant, an alarm is triggered immediately if the secured door is opened. On the other hand, you can buy a door alarm with a time delay mode.

This time delay is either fixed or can be set manually. The range of the delay is between five and thirty seconds.

Possible applications

A door alarm can be used in many ways. You can use it classically for doors to increase the burglary protection of your home.

It is particularly recommended to use it on doors that are at high risk of burglary, such as a patio door.

You can also convert a door alarm into a window alarm. The principle is the same.

However, if only the window pane is broken during a burglary without the window frame being opened, the alarm will not be triggered. For such cases, a glass breakage sensor is recommended.

Some door alarms still sound the alarm even if a window is smashed. (Image source: / martaposemuckel)

If you have a display case with valuable objects, you can also use the door alarm here to prevent unwanted opening.

The same applies to important doors that must not be opened easily, for example an emergency exit or escape route, a fire door, or a door in a nursing home where there is a risk of it being opened by a person suffering from dementia.

Another way to use a door alarm is to attach it to a refrigerator or freezer. If you forget to close the door properly, the door alarm can alert you.

Facts worth knowing about door alarms

How do I change the battery of my door alarm?

Changing the battery of a door alarm is as simple as changing the battery of a remote control. Depending on how your door alarm is mounted, you may need to carefully unscrew it from the adhesive strips or unscrew it loosely.

Then you can easily replace the batteries in the drawer on the door alarm and reattach the alarm.

It is important to know that most door alarms with conventional batteries have a life span of several months.

However, many are not equipped with the feature that they will beep if the batteries reach a low level. Therefore, you should check from time to time that your door alarm is still working.

How can I switch off my door alarm?

It depends on the type of operation you have chosen.

If you have chosen a door alarm with remote control, you will find at least two buttons on your remote control: one to activate and one to deactivate. This makes it easy to switch off your door alarm.

The same applies to a door alarm with a key. On the door alarm itself, you will find a lock that only allows you to turn it on and off. With the help of your key, you can select the appropriate mode.

In the case of a door alarm with a pin code, you have to enter the pin code of your door alarm to activate or deactivate it.

If you have an app for your door alarm, it depends on what options the operator offers you. You can use the app as a remote control or as a pin code lock.

Where can I find operating instructions for my door alarm?

In most cases, a door alarm comes with an instruction manual. However, if this is not the case or you have lost it, you can also look on the manufacturer’s website.

Every now and then you can also find an instruction manual for a door alarm in forums or on other websites. They are posted there because others have similar problems to yours.

Image source: / pixabay