Buy door guards – safety for emergency exits and escape routes in accordance with DIN EN 179

The AlertLatch door guard is the simple and secure solution for monitoring emergency exits. Compatible with DIN EN 179 emergency exit locks , ideal for kindergartens, schools and public buildings .

When the door guard is triggered, a continuous 98 dB alarm sounds. An optional pre-alarm is available, which sounds when the button is pressed. This prevents misuse of emergency exit doors without compromising escape route safety. Order now – available with or without pre-alarm.

AlertLatch Einhand-Türwächter Basic sichert ein Bürogebäude

Our top seller: The complete door guard set for secure escape route protection

✔ Compatible with DIN EN 179
✔ 98 dB alarm
✔ Easy installation
✔ Developed in Germany

Buy the complete set now →

Why a door guard is indispensable for your establishment

How does a door guard work?
The door guard oversees emergency exits and escape doors. It detects unauthorized door openings and triggers an audible alarm in such cases. This ensures that escape doors are not misused or abused in everyday life – without impairing their intended function in an emergency. This prevents unauthorized opening, while ensuring that escape routes remain usable at all times in accordance with DIN EN 179.

When is a door guard used?
These devices are used wherever doors serve as escape routes but also need to be secured – for example, in kindergartens, schools, hospitals, and government offices. They prevent the unauthorized opening of emergency exits without violating safety regulations.

What is an escape route safety system?
 Escape route security includes all technical measures,
These devices prevent escape and rescue routes from being misused or blocked . Examples include door monitors, emergency exit locks, electric locking mechanisms, and alarm systems. The goal is to balance security and escape routes – that is, to prevent misuse without trapping people in an emergency.

Overview of the advantages of the AlertLatch door guard

✔ Easy installation under the door handle (screw or adhesive mounting)
✔ Compatible with emergency exit locks according to DIN EN 179
✔ Integrated battery level monitoring
✔ 98 dB alarm (can be switched off) with optional pre-alarm
✔ Various models (Basic / Pre-alarm / Complete set / Cylinder options)

From FiSCHER Akkumulatorentechnik GmbH – 48 years of experience in safety and emergency lighting systems.

As a long-established manufacturer of emergency lighting and safety components, FiSCHER stands for certified quality and reliable delivery. AlertLatch is our innovative solution for the safe monitoring of escape routes – developed in Germany and compliant with the German Workplace Ordinance (ArbStättV) and the German Technical Rules for Workplaces (ASR A2.3).

Frequently asked questions about door guards & escape route security

What variations are there?

Models with and without pre-alarm, different cylinder options, single or multi-packs.

AlertLatch - Safety and regulatory compliance for emergency exits

The AlertLatch ensures that emergency exits are always unobstructed, as required by the Workplace Ordinance (ArbStättV) and the Technical Rules for Workplaces (ASR). At the same time, the AlertLatch gives operators effective control over the use of their premises.

Advantages of AlertLatch:
• Does NOT prevent emergency exits from being opened
• Ensures unobstructed escape routes in accordance with the Workplace Ordinance and Technical Rules for Workplaces
• A short pre-alarm when activated protects against misuse
• Very loud main alarm when fully opened
• Easy installation under the door handle

With AlertLatch, you meet the legal requirements for emergency exits while still maintaining control over your properties. Unauthorized access is reliably prevented without compromising security.

Trust AlertLatch for maximum safety and compliance of your emergency exits and escape routes!

Is the AlertLatch door monitor tested according to DIN EN 179?

A clear yes and no – and for good reason. DIN EN 179 regulates emergency exit devices with lever handles or push plates for doors in escape routes, but does not explicitly mention door monitors. Therefore, testing can only be carried out in accordance with DIN EN 179. Nevertheless, the AlertLatch door guard ensures compliance with all relevant safety requirements for emergency exit devices.


PS: Our managing director Axel Fischer has been active in standardization work nationally and internationally for over 10 years, leads European standardization projects and has in-depth expertise in this field.

Can I install the AlertLatch door guard myself?

You should have some manual dexterity and a basic set of tools. Detailed video installation instructions are available here to make assembly as easy and efficient as possible.

Door guards are usually much more expensive, why are you cheaper?

The door guard market was long dominated by a few companies. Thanks to expired patents, we can now offer our AlertLatch door guard – with innovative features and attractive pricing. As a company in the emergency lighting industry, we are accustomed to lean margins, which allows us to offer high-quality products at a significantly lower price than the industry standard. We pass these cost advantages directly on to you – without compromising on quality or features.

Find the right door guard now

Ensure the safety of your escape routes – with the right AlertLatch model for your emergency exit or escape route.

Buy a one-handed door guard now